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300-101 Practice Exam Free

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  • 300-101 Practice Exam Free – 50 Questions to Simulate the Real Exam
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300-101 Practice Exam Free – 50 Questions to Simulate the Real Exam

Are you getting ready for the 300-101 certification? Take your preparation to the next level with our 300-101 Practice Exam Free – a carefully designed set of 50 realistic exam-style questions to help you evaluate your knowledge and boost your confidence.

Using a 300-101 practice exam free is one of the best ways to:

  • Experience the format and difficulty of the real exam
  • Identify your strengths and focus on weak areas
  • Improve your test-taking speed and accuracy

Below, you will find 50 realistic 300-101 practice exam free questions covering key exam topics. Each question reflects the structure and challenge of the actual exam.

Question 1

Which value does Frame Relay use to identify a connection between a DTE and DCE?

A. DLCI

B. IP address

C. MAC address

D. VLAN ID

 


Suggested Answer: A

 

Question 2

When implementing a 6to4 tunnel, which IPv6 address is the correct translation of the IPv4 address 192.168.99.1?

A. c0a8:6301:2002::/48

B. 2002:c0a8:6301::/48

C. 2002:c0a8:6301::/8

D. 2002::/16

 


Suggested Answer: B

16 bits for the most significant 6to4 reserved bits (2002::/16) + 32 bits source ipv4 address (traslated in HEX format) = 48 bits.

Question 3

A network engineer wants to monitor hop-by-hop response time on the network. Which IP SLA operation accomplishes this task?

A. ICMP path jitter

B. ICMP-echo

C. ICMP path echo

D. UDP-echo

 


Suggested Answer: C

 

Question 4

Refer to the exhibit and the partial configuration on router R2. On router R4 all RIP routes are redistributed into the OSPF domain. A second redistribution is configured on router R2 using a route map. Based on the configuration on router R2, which EIGRP external routes will be present in the routing table of R1?
 Image

A. the routes originating from the RIP routing domain

B. the routes originating from the OSPF stub area

C. all OSPF inter and intra-area routes

D. all routes originating from RIP and OSPF routing domains

 


Suggested Answer: A

 

Question 5

Under which condition does UDP dominance occur?

A. when TCP traffic is in the same class as UDP

B. when UDP flows are assigned a lower priority queue

C. when WRED is enabled

D. when ACLs are in place to block TCP traffic

 


Suggested Answer: A

Mixing TCP with UDP –
It is a general best practice to not mix TCP-based traffic with UDP-based traffic (especially Streaming-Video) within a single service-provider class because of the behaviors of these protocols during periods of congestion. Specifically, TCP transmitters throttle back flows when drops are detected. Although some UDP applications have application-level windowing, flow control, and retransmission capabilities, most UDP transmitters are completely oblivious to drops and, thus, never lower transmission rates because of dropping.
When TCP flows are combined with UDP flows within a single service-provider class and the class experiences congestion, TCP flows continually lower their transmission rates, potentially giving up their bandwidth to UDP flows that are oblivious to drops. This effect is called TCP starvation/UDP dominance.
TCP starvation/UDP dominance likely occurs if (TCP-based) Mission-Critical Data is assigned to the same service-provider class as (UDP-based)
. Even if WRED is enabled on the service-provider class, the same behavior would be
Streaming-Video and the class experiences sustained congestion observed because WRED (for the most part) manages congestion only on TCP-based flows.
Reference:
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book/VPNQoS.html

Question 6

Refer to the exhibit.
 Image
When you examine the routing tables of R1 and R4, you are not able to see the R1 Ethernet subnet on the R4 routing table. You are also not able to see the R4
Ethernet subnet on the R1 routing table.
Which two configuration changes should be made to resolve this issue? Select the routers where the configuration change will be required, and select the required
EIGRP configuration command(s). Choose two answers. (Choose two.)

A. R1 and R4

B. R2 and R3

C. ip summary-address eigrp 1 10.1.1.0 255.255.255.0 and ip summary-address eigrp 1 10.2.2.0 255.255.255.0

D. variance 2

E. eigrp stub connected

 


Suggested Answer: F. no auto-summary

Of course, the routing is going through R2 and R3 to reach R4. So the two routers that need configuration change are R2 and R3. Also you need to set auto-summary to No. The no auto-summary command configures classless routing protocols such as RIPv2 and EIGRP to really act as classless because by default they’re classfull.

Question 7

For troubleshooting purposes, which method can you use in combination with the "debug ip packet" command to limit the amount of output data?

A. You can disable the IP route cache globally.

B. You can use the KRON scheduler.

C. You can use an extended access list.

D. You can use an IOS parser.

E. You can use the RITE traffic exporter.

 


Suggested Answer: C

The “debug ip packet” command generates a substantial amount of output and uses a substantial amount of system resources. This command should be used with caution in production networks. Always use with the access-list command to apply an extended ACL to the debug output.
Reference:
http://www.cisco.com/c/en/us/support/docs/security/dynamic-multipoint-vpn-dmvpn/111976-dmvpn-troubleshoot-00.html

Question 8

A customer requests policy-based routing. Packets arriving from source 209.165.200.225 should be sent to the next hop at 209.165.200.227, with the precedence bit set to priority. Packets arriving from source 209.165.200.226 should be sent to the next hop at 209.165.200.228, with the precedence bit set to critical.
Which configuration completes these requirements?

A. access-list 1 permit 209.165.200.225 access-list 2 permit 209.165.200.226 ! route-map Texas permit 10 match ip address 1 set ip precedence critical set ip next “”hop 209.165.200.227 ! route-map Texas permit 20 match ip address 2 set ip precedence priority set ip next-hop 209.165.200.228 ! interface ethernet 1 ip policy route-map Texas

B. access-list 1 permit 209.165.200.225 access-list 2 permit 209.165.200.226 ! route-map Texas permit 10 match ip address 1 set ip precedence priority set ip next “”hop 209.165.200.227 ! route-map Texas permit 20 match ip address 2 set ip precedence critical set ip next-hop 209.165.200.228 ! interface ethernet 1 ip policy route-map Texas

C. access-list 1 permit 209.165.200.228 access-list 2 permit 209.165.200.227 ! route-map Texas permit 10 match ip address 1 set ip precedence priority set ip next “”hop 209.165.200.226 ! route-map Texas permit 20 match ip address 2 set ip precedence critical set ip next-hop 209.165.200.225 ! interface ethernet 1 ip policy route-map Texas

D. access-list 1 permit 209.165.200.227 access-list 2 permit 209.165.200.228 ! route-map Texas permit 10 match ip address 1 set ip precedence priority set ip next “”hop 209.165.200.225 !

 


Suggested Answer: B

 

Question 9

Scenario:
You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. The customer has disabled your access to the show running-config command.
 Image
 Image
 Image
 Image
 Image
How many times was SPF algorithm executed on R4 for Area 1?

A. 1

B. 5

C. 9

D. 20

E. 54

F. 224

 


Suggested Answer: C

 

Question 10

ROUTE.com is a small IT corporation that has an existing enterprise network that is running IPv6 0SPFv3. Currently OSPF is configured on all routers. However,
R4's loopback address (FEC0:4:4) cannot be seen in R1's IPv6 routing table. You are tasked with identifying the cause of this fault and implementing the needed corrective actions that uses OPSF features and does not change the current area assignments. You will know that you have corrected the fault when R4's loopback address (FEC0:4:4) can be seen in RTs IPv6 routing table.
Special Note: To gain the maximum number of points you must remove all incorrect or unneeded configuration statements related to this issue.
 Image
 Image
 Image
 Image
A.
B.
C.
D.

 


Suggested Answer: Explanation

 

Question 11

When an EIGRP topology change is detected, what is the correct order of events when there is a FS?

A. The neighbor adjacency is deleted. The feasible route is used. DUAL is notified. Remove all topology entries learned from that neighbor.

B. DUAL is notified. Remove all topology entries learned from that neighbor. The neighbor adjacency is deleted. Routes enter the Active state and the feasible route is used.

C. The neighbor adjacency is deleted. Routes enter the Active state and the feasible route is used. DUAL is notified. Remove all topology entries learned from that neighbor.

D. DUAL is notified. The neighbor adjacency is deleted. Remove all topology entries learned from that neighbor.

 


Suggested Answer: D

 

Question 12

You have completed an OSPF implementation, and you are verifying OSPF operation. During this verification, you notice that the OSPF route of 172.16.10.0 is repeatedly appearing and disappearing from the routing table. Further investigation finds that the OSPF CPU utilization is very high and the routers are constantly performing SPF calculations. You determine that 172.16.20.2 is the source of the 172.16.10.0 route. Using the show ip ospf database router 172.16.20.1 command, you notice that when this show command is performed repeatedly, the contents of the LSA change every few seconds.
What could be the cause of this problem?

A. OSPF authentication errors between some of the routers.

B. Two routers have the same OSPF router ID.

C. Issues with mistuned OSPF timers.

D. OSPF LSA pacing issues between some of the routers.

 


Suggested Answer: E. OSPF neighbor adjacency problems between some of the routers.

When two routers use the same router ID in an OSPF domain, routing possibly does not work correctly. Cisco bug IDs CSCdr61598 and CSCdu08678 enhance the detection and reporting mechanisms of duplicate router IDs. Access the Bug Toolkit (registered customers only) in order to view additional information about these Cisco bug ID.
Reference:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080117102.shtml

Question 13

Refer to the exhibit.
 Image
Which command only announces the 1.2.3.0/24 network out of FastEthernet 0/0?

A. distribute list 1 out

B. distribute list 1 out FastEthernet0/0

C. distribute list 2 out

D. distribute list 2 out FastEthernet0/0

 


Suggested Answer: D

Access list 2 is more specific, allowing only 1.2.3.0/24, whereas access list 1 permits all 1.0.0.0/8 networks. This question also asks us to apply this distribute list only to the outbound direction of the fast Ethernet 0/0 interface, so the correct command is “distribute list 2 out FastEthernet0/0.”

Question 14

Refer to exhibit.
 Image
The exhibit shows R1 topology table to reach 192.168.1.0/24 network. Which route(s) will be installed in routing table of R1 to reach network 192.168.1.0/24 after configuring R1 with the following command?
Router(config-router)# variance 2

A. R2 only

B. R2 and R3

C. R2 and R4

 


Suggested Answer: D. R2, R3 and R4

EIGRP will only use equal-cost load-balancing feature even when the variance command is used. However, if you use both the traffic-share min command and variance command, even though traffic is sent over the minimum-cost path only, all feasible routes get installed into the routing table, which decreases the convergence times

Question 15

What does the default value of the EIGRP variance command of 1 mean?

A. Load balancing is disabled on this router.

B. The router performs equal-cost load balancing.

C. Only the path that is the feasible successor should be used.

D. The router only performs equal-cost load balancing on all paths that have a metric greater than 1.

 


Suggested Answer: B

Explanations –
The point of the question is about the balance configuration of EIGRP. If variance is 1, it means that it support Equal cost path.

Question 16

You have been asked to evaluate how EIGRP is functioning in a customer network.
 Image
 Image
Which key chain is being used for authentication of EIGRP adjacency between R4 and R2?

A. CISCO

B. EIGRP

C. key

D. MD5

 


Suggested Answer: A

R4 and R2 configs are as shown below:
<img src=”https://www.examtopics.com/assets/media/exam-media/02670/n27369600001.png” alt=”Reference Image” />
To successfully authenticate between two EIGRP neighbors, the key number and key-string must match. The key chain name is only for local use. In this case we have key number “1” and key-string “CISCO” and they match so EIGRP neighbor relationship is formed.
Note :
You can download this sim to practice at http://www.digitaltut.com/download/ROUTE_EIGRP.zip. Please use GNS3 with version older than v1.0 to open it
(v0.8.3.1 for example). IOS used in this lab: c3640-jk9s-mz.124-16.bin

Question 17

Scenario:
You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. The customer has disabled your access to the show running-config command.
Which of the following statements is true about the serial links that terminate in R3

A. The R1-R3 link needs the neighbor command for the adjacency to stay up

B. The R2-R3 link OSPF timer values are 30, 120, 120

C. The R1-R3 link OSPF timer values should be 10,40,40

D. R3 is responsible for flooding LSUs to all the routers on the network.

 


Suggested Answer: B

<img src=”https://www.examtopics.com/assets/media/exam-media/02670/n27368400000.jpg” alt=”Reference Image” />
We can see the configured timers using the following command:
Check the Serial1/0 interface of R3 which is connected to R2 with the “show ip ospf interface serial 1/0” command:
There are two things we should notice from the output above:
+ The “network type” connection between R2-R3 is “NON_BROADCAST” (usually we have “BROADCAST”). OSPF neighbors are discovered using multicast
Hello packets. In non broadcast environment, multicast (and broadcast) messages are not allowed so OSPF neighborship cannot be formed automatically.
Therefore we have to establish OSPF neighborship manually by using “neighbor ” command under OSPF process (OSPF will send unicast Hello message to this address). For example on R2 we have to use these commands: router ospf 1 neighbor 192.168.23.3
And on R3:
router ospf 1
neighbor 192.168.23.2
+ For non broadcast environment the default Hello timer is 30 seconds; Dead timer (time to wait before declaring a neighbor dead) is 120 seconds and Wait timer
(causes the interface to exit out of the wait period and select a DR on a broadcast network. This timer is always equal to the dead timer interval) is 120 seconds. In the output we also see the default timers for non broadcast network.
Note :
You can download this sim to practice at http://www.digitaltut.com/download/ROUTE_OSPF.zip. Please use GNS3 with version older than v1.0 to open it (v0.8.3.1 for example). IOS used in this lab: c3640-jk9s-mz.124-16.bin

Question 18

A network administrator executes the command clear ip route. Which two tables does this
"Pass Any Exam. Any Time." - www.actualtests.com                         4 command clear and rebuild? (Choose two.)

A. IP routing

B. FIB

C. ARP cache

D. MAC address table

E. Cisco Express Forwarding table

F. topology table

 


Suggested Answer: AB

 

Question 19

Image
Refer to the exhibit. A network engineer has configured GRE between two IOS routers. The state of the tunnel interface is continuously oscillating between up and down. What is the solution to this problem?

A. Create a more specific ARP entry to define how to reach the remote router.

B. Save the configuration and reload the router.

C. Create a more specific static route to define how to reach the remote router.

D. Check whether the Internet service provider link is stable,

 


Suggested Answer: C

References:
http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/22327-gre-flap.html

Question 20

Drag and drop the Cisco Express Forwarding adjacency types from the left to the correct type of processing on the right.
 Image
A.
B.
C.
D.

 


Suggested Answer: Explanation

<img src=”https://www.examtopics.com/assets/media/exam-media/02670/n27419700001.png” alt=”Reference Image” />

Question 21

By default, which statement is correct regarding the redistribution of routes from other routing protocols into OSPF? Select the best response.

A. They will appear in the OSPF routing table as type E1 routes.

B. They will appear in the OSPF routing table as type E2 routes

C. Summarized routes are not accepted.

D. All imported routes will be automatically summarized when possible.

E. Only routes with lower administrative distances will be imported. B

 


Suggested Answer: Explanation

Type E1 external routes calculate the cost by adding the external cost to the internal cost of each link that the packet crosses while the external cost of E2 packet routes is always the external cost only. E2 is useful if you do not want internal routing to determine the path. E1 is useful when internal routing should be included in path selection. E2 is the default external metric when redistributing routes from other routing protocols into OSPF.

Question 22

Refer to the exhibit. A network engineer executes the show ipv6 ospf database command and is presented with the output that is shown.
Which flooding scope is referenced in the link-state type?
 Image

A. Link-local

B. Area

C. As (OSPF domain)

D. Reserved

 


Suggested Answer: B

 

Question 23

Scenario:
You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. The customer has disabled your access to the show running-config command.
 Image
 Image
 Image
 Image
 Image
Which of the following statements is true about the serial links that terminate in R3

A. The R1-R3 link needs the neighbor command for the adjacency to stay up

B. The R2-R3 link OSPF timer values are 30, 120, 120

C. The R1-R3 link OSPF timer values should be 10,40,40

D. R3 is responsible for flooding LSUs to all the routers on the network.

 


Suggested Answer: B

 

Question 24

How is network layer addressing accomplished in the OSI protocol suite?

A. Internet Protocol address

B. Media Access Control address

C. Packet Layer Protocol address

D. Network Service Access Point address

E. Authority and Format Identifier address

 


Suggested Answer: D

OSI network-layer addressing is implemented by using two types of hierarchical addresses: network service access-point addresses and network-entity titles.
A network service-access point (NSAP) is a conceptual point on the boundary between the network and the transport layers.
The NSAP is the location at which OSI network services are provided to the transport layer.
Each transport-layer entity is assigned a single NSAP, which is individually addressed in an OSI internetwork using NSAP addresses.
Network Service Address Point (NSAP) address is the equivalent of an IP address for an OSI network; A NSAP address is a hexadecimal address with a length of up to 40 hexadecimal digits.
NSAP addresses are used in ATM and IS-IS.

Question 25

Which Cisco Express Forwarding component(s) contain forwarding information?

A. FIB, adjacency table

B. adjacency table

C. FIB, RIB, Adjanceny table

D. FIB

E. RIB

 


Suggested Answer: A

 

Question 26

Which command can be entered on router R5 to configure 80 percent of the bandwidth of a link for EIGRP Autonomous System 55?

A. R5(config-if#)#ip bandwidth percent eigrp bandwidth 55 80

B. R5(config-pmap-c)#priority percent 80

C. R5(config-if)#ipv6 bandwidth-percent eigrp 55 80

D. R5(config-if)#ipv6 bandwidth-percent eigrp 80 55

E. R5(config-if)#ip bandwidth-percent eigrp 80 55

 


Suggested Answer: C

 

Question 27

Which two statements are true about EIGRP manual summarization? (Choose two.)

A. Manual summarization is configured on a per interface basis.

B. Manual summaries can be configured with the classful mask only.

C. When manual summarization is configured, autosummarization is automatically disabled by default.

D. The summary address is assigned an administrative distance of 10 by default.

E. The summary address is entered into the routing table and is shown to be sourced from the Null0 interface.

 


Suggested Answer: AE

 

Question 28

Which TCP port for BGP?

A. port 161

B. port 123

C. port 179

D. port 47

 


Suggested Answer: C

 

Question 29

After implementing EIGRP on your network, you issue the show ip eigrp traffic command on router C. The following output is shown:
RouterC#show ip eigrp traffic -
IP-EIGRP Traffic Statistics for process 1
Hellos sent/received: 2112/2076 -
Updates sent/received: 47/38 -
Queries sent/received: 5/3 -
Replies sent/received: 3/4 -
Acks sent/received: 29/33 -
Input queue high water mark 2, 0 drops
SIA-Queries sent/received: 0/0 -
SIA-Replies sent/received: 0/0 -
Moments later, you issue the same command a second time and the following output is shown:
RouterC#show ip eigrp traffic -
IP-EIGRP Traffic Statistics for process 1
Hellos sent/received: 2139/2104 -
Updates sent/received: 50/39 -
Queries sent/received: 5/4 -
Replies sent/received: 4/4 -
Acks sent/received: 31/37 -
Input queue high water mark 2, 0 drops
SIA-Queries sent/received: 0/0 -
SIA-Replies sent/received: 0/0 -
Moments later, you issue the same command a third time and the following output is shown:
RouterC#show ip eigrp traffic -
IP-EIGRP Traffic Statistics for process 1
Hellos sent/received: 2162/2126 -
Updates sent/received: 53/42 -
Queries sent/received: 5/5 -
Replies sent/received: 5/4 -
Acks sent/received: 35/41 -
Input queue high water mark 2, 0 drops
SIA-Queries sent/received: 0/0 -
SIA-Replies sent/received: 0/0 -
What information can you determine about this network?

A. The network is stable.

B. There is a flapping link or interface, and router C knows an alternate path to the network.

C. There is a flapping link or interface, and router C does not know an alternate path to the network.

D. EIGRP is not working correctly on router C.

E. There is not enough information to make a determination.

 


Suggested Answer: B

Explanation –
We notice that the Queries received number is increased so router C has been asked for a route. The Replies sent number is also increased -> router C knows an alternate path to the network.

Question 30

Which three items can you track when you use two time stamps with IP SLAs? (Choose three.)

A. delay

B. jitter

C. packet loss

D. load

E. throughput

F. path

 


Suggested Answer: ABC

 

Question 31

Refer to the exhibit.
 Image
After configuring the routes, the network engineer executes the show ip route command. What is the expected results?

A. Gateway of last resort is 10.0.2.1 to network 0.0.0.0 10.0.0.0/24 is subnetted, 2 subnets C 10.0.2.0 is directly connected, FastEthernet0/0 10.0.1.0 is directly connected, FastEthernet0/1 S*0.0.0.0/0 [1/0] via 10.0.2.1(1/0] via 10.0.1.1

B. Gateway of last resort is 10 0.2 1 to network 0.0.0.0 10 0.0 0/24 is subnetted, 1 subnet C 10.0.2.0 is directly connected, FastEthernet0/0 S* 0.0.0 0/0 [1/0] via 10.0.2.1

C. Gateway of last report is not set

D. Gateway of test resort is 10.0.1.1 to network 0.0.0.0 10.0.0.0/24 is subnetted 1 subnet C 10.0.1.0 is directly connected FastEthernet0/1 S*0.0.0.0/0 [1/0] via 10.0.1.1

 


Suggested Answer: C

 

Question 32

Which two statements about EVN are true? (Choose two.)

A. Virtual network tags are assigned per-VRF.

B. It is supported only on access ports.

C. Virtual network tags are assigned globally.

D. Routing metrics can be manipulated only from directly within the routing-context configuration.

E. The VLAN ID in the 802.1q frame carries the virtual network tag.

F. The VLAN ID is the ISL frame carries the virtual network tag. AE

 


Suggested Answer: Explanation

 

Question 33

The following configuration is applied to a router at a branch site: ipv6 dhcp pool dhcp-pool dns-server 2001:DB8:1:B::1 dns-server 2001:DB8:3:307C::42 domain-name example.com
!
If IPv6 is configured with default settings on all interfaces on the router, which two dynamic IPv6 addressing mechanisms could you use on end hosts to provide end-to-end connectivity? (Choose two.)

A. EUI-64

B. SLAAC

C. DHCPv6

D. BOOTP

 


Suggested Answer: AB

“Pass Any Exam. Any Time.” – www.actualtests.com 84

Question 34

What two situations could require the use of multiple routing protocols? (Choose two)

A. when using UNIX host-based routers

B. when smaller broadcast domains are desired

C. because having multiple routing protocols confuses hackers

D. when migrating from an older Interior Gateway Protocol (IGP) to a new IGP

E. when all equipment is manufactured by Cisco

F. when there are multiple paths to destination networks AD

 


Suggested Answer: Explanation

Simple routing protocols work well for simple networks, but networks grow and become more complex.
While running a single routing protocol throughout your entire IP internetwork is desirable, multiprotocol routing is common for a number of reasons, including company mergers, multiple departments managed by multiple network administrators, multivendor environments, or simply because the original routing protocol is no longer the best choice.
Often, the multiple protocols are redistributed into each other during a migration period from one protocol to the other.

Question 35

Refer to the exhibit.
 Image
Network administrators have set up a hub and spoke topology with redundant connections using EIGRP. However, they are concerned that a network outage between Router R1 and Router R2 will cause traffic from the 10.1.1.x network to the 10.1.2.x network to traverse the remote office links and overwhelm them.
What command should be used to configure the spoke routers as EIGRP stub routers that will not advertise connected networks, static routes, or summary addresses?

A. eigrp stub

B. eigrp stub receive-only

C. eigrp stub connected static

D. no eigrp stub connected static

E. No additional command is needed beyond a default EIGRP configuration.

 


Suggested Answer: B

A router that is configured as a stub with the eigrp stub command shares connected and summary routing information with all neighbor routers by default. Four optional keywords can be used with the eigrp stub command to modify this behavior:
receive-only
Reference Image
connected
Reference Image
static
Reference Image
summary
Reference Image
This section provides configuration examples for all forms of the eigrp stub command. The eigrp stub command can be modified with several options, and these options can be used in any combination except for the receive-only keyword. The receive-only keyword will restrict the router from sharing any of its routes with any other router in that EIGRP autonomous system, and the receive-only keyword will not permit any other option to be specified because it prevents any type of route from being sent. The three other optional keywords (connected, static, and summary) can be used in any combination but cannot be used with the receive- only keyword. If any of these three keywords is used individually with the eigrp stub command, connected and summary routes will not be sent automatically.
The connected keyword will permit the EIGRP Stub Routing feature to send connected routes. If the connected routes are not covered by a network statement, it may be necessary to redistribute connected routes with the redistribute connected command under the EIGRP process. This option is enabled by default.
The static keyword will permit the EIGRP Stub Routing feature to send static routes. Without the configuration of this option, EIGRP will not send any static routes, including internal static routes that normally would be automatically redistributed. It will still be necessary to redistribute static routes with the redistribute static command.
The summary keyword will permit the EIGRP Stub Routing feature to send summary routes. Summary routes can be created manually with the summary address command or automatically at a major network border router with the auto-summary command enabled.
This option is enabled by default.
In the following example, the eigrp stub command is used to configure the router as a stub that advertises connected and summary routes: router eigrp 1 network 10.0.0.0 eigrp stub
In the following example, the eigrp stub command is issued with the connected and static keywords to configure the router as a stub that advertises connected and static routes (sending summary routes will not be permitted): router eigrp 1 network 10.0.0.0 eigrp stub connected static
In the following example, the eigrp stub command is issued with the receive-only keyword to configure the router as a receive-only neighbor (Connected, summary, and static routes will not be sent): router eigrp 1 network 10.0.0.0 eigrp eigrp stub receive-only
Reference:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1829/products_feature_guide09186a00
80087026.html

Question 36

Which routing protocol will continue to receive and process routing updates from neighbors after the passive interface router configuration command is entered?

A. EIGRP

B. RIP

C. OSPF

D. IS-IS

 


Suggested Answer: B

 

Question 37

A network administrator is troubleshooting a DMVPN setup between the hub and the spoke. Which action should the administrator take before troubleshooting the
IPsec configuration?

A. Verify the GRE tunnels.

B. Verify ISAKMP.

C. Verify NHRP.

D. Verify crypto maps.

 


Suggested Answer: A

 

Question 38

Based on the exhibited output, which three statements are true? (Choose three.)
 Image

A. R1 is configured with the variance command.

B. The route to 10.2.0.0/16 was redistributed into EIGRP.

C. A default route has been redistributed into the EIGRP autonomous system.

D. R1 is configured with the ip summary-address command.

E. The router at 10.1.1.2 is configured with the ip default-network 0.0.0.0 command.

 


Suggested Answer: F. R1 is sourcing an external EIGRP route from Null0.

Explanation –
From the routing table above, we see that network 172.16.1. can be reached via 2 unequal paths (with FD of 23072000 & 20640000) so surely R1 has been configured with the variance command
By configuring a default route and redistribute it into EIGRP you will get the line D *EX 0.0.0.0/0 … line in the routing table of that router
From the line 10.2.0.0/16 is a summary, 00:16:18, Null0 we know that this network has been summarized with the ip summaray-address command (notice that
10.2.0.0 is not the major network of net

Question 39

Which STP feature can reduce TCNs on ports that are connected to end devices?

A. BPDU guard

B. Root guard

C. PortFast

D. BackboneFast

 


Suggested Answer: C

 

Question 40

A network engineer is migrating an IPv4 point-to multipoint Frame Relay network to IPv6. Which IPv6 address type must be used in a Frame Relay map configuration command to ensure that the OSPF protocol still works after migration?

A. unique-local

B. link-local

C. global

D. site-local

E. multicast

 


Suggested Answer: B

 

Question 41

Refer to the following.
Router # sh ip route eigrp -
13.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
D 13.0.0.0/8 is a summary, 00:00:32, Null0
What happens to packets that are forwarded from the 13.0.0.0/8 network to the Null0 interface?

A. Flagged

B. Accepted

C. Summarized

D. Dropped

 


Suggested Answer: D

When an EIGRP router summarizes, it automatically builds a route to null0 for the summarized route. The router to null0 prevents packets that do not match a specific entry in the routing table from following a default route. (The route to null0 causes the packet to be dropped).

Question 42

Refer to the exhibit.
 Image
What happens when the router stops receiving advertisements for the 10.1.2.0/24 network?

A. The summary route will be removed from the table.

B. The summary route will remain in the table.

C. The more specific routes will be advertised from the table.

D. 10.1.2.0/24 will still be advertised but packets destined for it will be dropped when they reach this router.

 


Suggested Answer: B

If you look very closely at the routing table output, we can conclude that R1 has “auto- summary” enabled under the EIGRP routing process.
D 10.0.0.0/8 is a summary, 00:23:20, Null 0
Anytime the “auto-summary” is enabled under the routing process the router will install a summary route to “null 0” as long as the router has one or more subnets within the “classful” network. In the case above, you have two directly connected interfaces (Serial1 & Serial2) that are within the “classful” network. Therefore, regardless of whether you leran a route via EIGRP that is in the “classful” network, R1 will still install this summary route to “null 0”.

Question 43

When using SNMPv3 with NoAuthNoPriv, which string is matched for authentication?

A. username

B. password

C. community-string

D. encryption-key

 


Suggested Answer: A

The following security models exist: SNMPv1, SNMPv2, SNMPv3. The following security levels exits: “noAuthNoPriv” (no authentiation and no encryption “” noauth keyword in CLI), “AuthNoPriv109thernet109ationre authenticated but not encrypted “” auth keyword in CLI), “AuthPriv” (messages are authenticated and encrypted “” priv keyword in CLI). SNMPv1 and SNMPv2 models only support the “noAuthNoPriv” model since they use plain community string to match the incoming packets. The SNMPv3 implementations could be configured to use either of the models on per-group basis (in case if “noAuthNoPriv” is configured,
).
username serves as a replacement for community string
Reference:
http://blog.ine.com/2008/07/19/snmpv3-tutorial/

Question 44

What are two important differences between OSPFv2 and OSPFv3? (Choose two.)

A. Only OSPFv3 provides support for IPv6.

B. Only OSPFv3 automatically chooses a router ID for the local device.

C. Only OSPFv3 automatically enable interfaces when you create them in device configuration mode.

D. Only OSPFv3 supports multiple OSPF instances on a single link.

E. Only OSPFv3 automatically detects OSPF neighbors on an NBMA interface.

 


Suggested Answer: AD

 

Question 45

Refer to the Exhibit.
 Image
Routers in the Diagram are configured with EIGRP. If RTB and RTC fail, which action will RTA take with respect to the HQ network?

A. RTA will automatically route packets via RTD to the HQ network.

B. RTA will place the route via RTD into the hold down state.

C. RTA will go into the active state for all routers.

 


Suggested Answer: D. RTA will go into the active state for the route to HQ network.

When RTB and RTC fails, RTA will go into active state for the HQ network route.

Question 46

Identify three characteristics of EIGRP feasible successors? (Choose three.)

A. A feasible successor is selected by comparing the advertised distance of a non-successor route to the feasible distance of the best route.

B. If the advertised distance of the non-successor route is less than the feasible distance of best route, then that route is identified as a feasible successor.

C. If the successor becomes unavailable, then the feasible successor can be used immediately without recalculating for a lost route.

D. The feasible successor can be found in the routing table.

E. Traffic will be load balanced between feasible successors with the same advertised distance.

 


Suggested Answer: ABC

Reference: http://packetlife.net/blog/2010/aug/9/eigrp-feasible-successor-routes/

Question 47

Which two statements are true about EIGRP manual summarization? (Choose two.)

A. Manual summarization is configured on a per interface basis.

B. Manual summaries can be configured with the classful mask only.

C. When manual summarization is configured, autosummarization is automatically disabled by default.

D. The summary address is assigned an administrative distance of 10 by default.

E. The summary address is entered into the routing table and is shown to be sourced from the Null0 interface.

 


Suggested Answer: AE

You can configure a summary addresses on a per-interface basis. You need to manually define summary addresses if you want to create summary addresses that do not occur at a network number boundary or if you want to use summary addresses on a ASA with automatic route summarization disabled. If any more specific routes are in the routing table, EIGRP will advertise the summary address out the interface with a metric equal to the minimum of all more specific routes.

Question 48

IP CEF load-sharing options (Choose three.)

A. Tunnel

B. Universal

C. Include-ports

D. Source

E. Destination ABC

 


Suggested Answer: Explanation

 

Question 49

What is the administrative distance for EBGP?

A. 200

B. 20

C. 30

D. 70

 


Suggested Answer: B

 

Question 50

Refer to the exhibit.
 Image
A company would prefer all Internet-bound OSPF routed traffic to use ISP ABC with ISP DEF as a backup. As the network consultant, what three configuration changes should you make? (Choose three.)

A. The default-information originate command should be configured on router B1 and B4.

B. The default-information originate command should be configured on router B2 and B3.

C. If the metric value for ISP ABC is set at the default, the ISP DEF metric value should be set to 1.

D. If the metric value for ISP ABC is set at the default, the ISP DEF metric value should be set to 25.

E. The metric type value should be set to type 1.

F. The metric type value should be set to type 2.

 


Suggested Answer: BDF

Explanation –
Routers B2 & B3 need to advertise a default route to the Internet for inside OSPF routers so we should use the default-information originate command with a default route (something like ip route 0.0.0.0 0.0.0.0 ) pointing to the ISP router.
If no metric is specified, OSPF puts a default value of 20 when redistributing routes from all protocols except BGP routes (BGP routes get a metric of 1). We use
ISP DEF as a backup so its metric value should be set to a higher value than 20.
There are two types of external routes: external type 1 and external type 2. The difference between the two is in the way the cost (metric) of the route is being calculated:
+ The cost of a type 2 route is always the external cost, irrespective of the interior cost to reach that route.
+ Type 1 cost is the addition of the external cost and the internal cost used to reach that route.
-> We should configure the type 2 external route to make sure the ISP ABC is always referred over ISP DEF because internal routing does not determine the path.
Note: E2 is the default external metric, but E1 is preferred over E2 if two equal-cost paths exist.

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