JN0-349 Mock Test Free – 50 Realistic Questions to Prepare with Confidence.
Getting ready for your JN0-349 certification exam? Start your preparation the smart way with our JN0-349 Mock Test Free – a carefully crafted set of 50 realistic, exam-style questions to help you practice effectively and boost your confidence.
Using a mock test free for JN0-349 exam is one of the best ways to:
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Below, you will find 50 free questions from our JN0-349 Mock Test Free resource. These questions are structured to reflect the real exam’s difficulty and content areas, helping you assess your readiness accurately.
Click the Exhibit button.Referring to the exhibit, which statement is correct?
A. The device is the root bridge?
B. The spanning tree session has timed out.
C. The local bridge priority is set to 8k.
D. The bridge priority on the root device is set to 8k.
You have two routers unable to form an IS-IS Level 1 adjacency. Which two statements describe a reason for this problem? (Choose two.)
A. The MTU is set to 1500.
B. Interface lo0 is not included as an IS-IS interface.
C. The area numbers are different.
D. The interfaces are on different subnets.
A BGP session shows the state as active. What does the state indicate in this scenario?
A. A keepalive message has been received.
B. The BGP session is fully established and routes are being passed.
C. The TCP connection is successful, and BGP is waiting for the OPEN message from its peer.
D. The routes are still trying to establish a TCP connection.
Which two statements about BPDU protection are correct? (Choose two.)
A. By default, you must manually clear a BPDU error condition when using BPDU protection.
B. BPDU protection prevents unauthorized switches from connecting to and participating in your spanning tree topology.
C. By default, BPDU protection prevents the root bridge from communicating with other STP members unless it receives a superior BPDU first.
D. BPDU protection requires that STP or RSTP is configured on the switch.
Which statement describes BFD?
A. BFD rapidly detects link failures.
B. BFD provides route loop protection.
C. BFD provides broadcast storm protection.
D. BFD provides high availability with multiple Routing Engines.
You have configured storm control on your network devices. Your network has grown and you no longer have time to investigate each occurrence of a storm control violation. You want to enable a port to automatically be re-enabled after a storm violation. In this scenario, which Junos OS configuration timeout would accomplish this task?
A. Configure the secure access port timeout.
B. Configure the port error disable timeout.
C. Configure the BPDU blocking timeout.
D. Configure the MAG aging table timeout.
You are running a Virtual Chassis with nonstop routing enabled. You want to confirm that the BGP routing table synchronization has completed on the backup Routing Engine. Which command will show you this information?
A. show task replication
B. show bgp summary
C. show bgp neighbor
D. show bgp replication
Which two statements are true regarding RIB groups? (Choose two.)
A. The first table listed is the primary route table and determines the address family of the RIB group.
B. The last table listed is the primary route table and determines the address family of the RIB group.
C. A RIB group must contain one or more export-rib statements.
D. A RIB group must contain one or more import-rib statements.
You do not want any spanning tree protocols operating in your environment, and you want to ensure that no BPDUs can be introduced into the environment. Which statement is true in this scenario?
A. You must run a spanning tree protocol to block BPDUs.
B. Incoming BPDUs are blocked by default if a spanning tree protocol is not operating.
C. You can block BPDUs without running a spanning tree protocol using Layer 3 control.
D. Incoming BPDUs can only be blocked by the root bridge.
Click the Exhibit button.Referring to the exhibit, which port will be selected as the RSTP root port on Switch-4?
A. ge-0/0/13.0
B. ge-0/0/8.0
C. ge-0/0/9.0
D. ge-0/0/12.0
You must limit access to a printer with a persistent DHCP address of 2001:db8:0000:50::10/64 in VLAN v50 to users assigned to VLAN v50 only. Which action would satisfy this requirement?
A. Implement persistent MAC learning to ensure that 2001:db8:0000:50::10 is allocated properly.
B. Implement a firewall filter on the IRB interface for VLAN v50, blocking traffic to/from 2001:db8:0000:50::10.
C. Implement a firewall filter on the VLAN v50, blocking traffic to/from 2001:db8:0000:50::10.
D. Implement DHCP snooping on VLAN v50 to ensure that 2001:db8:0000:50::10 is allocated properly.
Your router is learning the 172.25.11.0/24 prefix from both the BGP and OSPF protocols. A routing policy is configured on your device to advertise the prefix to an established BGP peer but the peer is not receiving the prefix. You want to allow the prefix to be advertised to the BGP peer. What should you do on this router to satisfy this requirement?
A. Enable the automatic removal of peer AS information from the prefix.
B. Enable the advertisement of inactive BGP routes.
C. Enable the automatic removal of private AS numbers from the prefix.
D. Enable the automatic refreshing of BGP routes.
Click the Exhibit button.Referring to the exhibit, which set of interfaces is enabled for Ethernet switching?
A. ge-0/0/6, ge-0/0/7, and ge-0/0/8
B. ge-0/0/6, ge-0/0/8, and ge-0/0/10
C. ge0/0/6, ge-0/0/7, ge-0/0/8, and ge-0/0/10
D. ge-0/0/6 and ge-0/0/8
What are three reasons a router would send out an IS-IS link-state PDU? (Choose three.)
A. A new external route is imported from BGP.
B. The router’s link to a neighbor goes down.
C. A new neighbor exists on the link.
D. The cost of a link to an existing neighbor has changed.
E. IS-IS sends link-state PDUs at random intervals.
Click the Exhibit button.Given the exhibit, which two statements are correct regarding the graceful-restart state for the BGP groups? (Choose two.)
A. The graceful-restart capability will be enabled for group IBGP.
B. The graceful-restart capability will be disabled for group IBGP.
C. The graceful-restart capability will be disabled for group EBGP.
D. The graceful-restart capability will be enabled for group EBGP.
Click the Exhibit button.Referring to the exhibit, which type of route is displayed?
A. martian
B. static
C. generate
D. aggregate
Routet-1 and Router-2 must connect through the Internet using a tunneling technology. Hosts that are connected to Router-1 and Router-2 will be sending traffic up to 1500 bytes. The maximum segment size that is supported across the path is 1520 bytes. Which tunneling technology will allow this communication to take place?
A. IP-IP tunnel
B. GRE tunnel
C. IPsec VPN tunnel mode
D. IPsec VPN transport mode
The router ID is not configured. How does OSPFv3 determine the router ID in this situation?
A. OSPFv3 uses the IPv4 address of the first interface that comes up.
B. OSPFv3 uses the IPv6 address of the last interface that comes up.
C. OSPFv3 uses the IPv6 address of the first interface that comes up.
D. OSPFv3 uses the IPv4 address of the last interface that comes up.
Click the Exhibit button.You are building a network and make some configuration changes. While trying to validate these changes, you receive the error shown in the exhibit. How would you solve this problem?
A. You must create a new VLAN called all using the VLAN ID of 30.
B. You must configure the ge-0/0/5.0 interface with family inet instead of family ethernet-switching.
C. You must configure the port mode as trunk on the ge-0/0/5.0 interface.
D. You must create two sub-interfaces on ge-0/0/5 with the appropriate VLAN member assigned to each.
By default, how long will a learned MAC address be retained in the bridge table on an EX Series switch?
A. 600 seconds
B. 3600 seconds
C. 300 seconds
D. 1800 seconds
Click the Exhibit button.Referring to the exhibit, which two statements are correct? (Choose two.)
A. R2 and R3 can form a Level 1 IS-IS adjacency.
B. R4 and R5 can form a Level 1 IS-IS adjacency.
C. R1 and R5 can form a Level 1 IS-IS adjacency.
D. R3 and R4 can form a Level 2 IS-IS adjacency.
Click the Exhibit button.Referring to the exhibit, what does the asterisk(*) following the ge-0/0/5.0 interface indicate?
A. It indicates the interface is not active.
B. It indicates the interface is a trunk port.
C. It indicates the interface is an access port.
D. It indicates the interface is active.
Which statement is correct about the OSPF router ID (RID)?
A. The OSPF RID must match for all routers in the same area.
B. The OSPF RID for IPv6 is a 128-bit address.
C. The OSPF RID for IPv4 is a 32-bit address.
D. The OSPF RID is not necessary when BFD is implemented.
Click the Exhibit button.Which statement is true about the configuration shown in the exhibit?
A. Only the next-hop-self export policy will be evaluated when routes are sent to neighbor 172.30.1.1.
B. Both the adv-aggregate and adv-custom export policies will be evaluated when routes are sent to neighbor 172.30.2.1.
C. Both the adv-aggregate and next-hop-self export policies will be evaluated when routes are sent to neighbor 172.30.1.1.
D. Only the adv-custom export policy will be evaluated when routes are sent to neighbor 172.30.2.1.
Which statement describes GRES?
A. GRES requires NSR to function properly.
B. GRES provides routing loop protection.
C. GRES provides hardware-level high availability.
D. GRES rapidly detects link failures.
Click the Exhibit button.Which two statements about the configuration shown in the exhibit are correct? (Choose two.)
A. Two next-hop interfaces should appear in the routing table for the 172.20.112.0/24 prefix.
B. Multiple equal-cost next hops are installed in the forwarding table for the 192.168.2.0/30 prefix.
C. The route preference is the same for each static route.
D. Only the selected next-hop interface should appear in the forwarding table for the 172.20.112.0/24 prefix.
Which two statements about Layer 2 loop prevention protocols are correct? (Choose two.)
A. RSTP distributes the current tree topology using the root bridge.
B. STP can take 30 to 50 seconds to respond to a topology change.
C. RSTP can take 30 to 50 seconds to respond to a topology change.
D. STP distributes the current tree topology using the root bridge.
What is a characteristic of OSPF ASBRs?
A. ASBRs transmit routing information between the backbone and other areas.
B. ASBRs cannot be part of the backbone and another area at the same time.
C. ASBRs inject routing information from outside the OSPF domain.
D. ASBRs link two OSPF areas.
Which two statements about a Virtual Chassis are correct? (Choose two.)
A. A Virtual Chassis is managed using a single virtual console port.
B. You must use the same EX Series switch for all members in a Virtual Chassis.
C. All members in a Virtual Chassis must be running the same Junos version.
D. Each device must be managed separately.
You have an IBGP neighbor sending you routes. You need to apply a policy so it only evaluates routes being learned from this specific neighbor. In this scenario, which statement is correct about applying the policy?
A. The policy should be applied as an export policy to the BGP group level.
B. The policy should be applied as an import policy to the BGP group level.
C. The policy should be applied as an export policy to the BGP neighbor level.
D. The policy should be applied as an import policy to the BGP neighbor level.
On EX Series devices, what are two software features that accommodate redundancy? (Choose two.)
A. OAM
B. NSR
C. IGMP
D. GRES
You are configuring OSPF and want to ensure that interface ge-0/0/3 is preferred over interface ge-0/0/4. Which statement is correct in this scenario?
A. Configure ge-0/0/3 with a higher metric.
B. Configure reference bandwidth.
C. Configure a redistribution policy.
D. Configure ge-0/0/4 with a higher metric.
Click the Exhibit button.Referring to the exhibit, Router 1 learns about Route X. Which statement is correct about Route X when using the default BGP advertisement rules?
A. R1 will not advertise this route to any peers.
B. R3 will not advertise this route to R4 or R5 without an explicit policy.
C. R4 and R5 will not advertise this route to each other.
D. R2 will not advertise this route to R3 without an explicit policy.
In which adjacency state do OSPF routers determine which router is in charge of the database synchronization process?
A. ExStart
B. Exchange
C. 2Way
D. Init
Click the Exhibit button.Which type of route is shown in the exhibit?
A. generated
B. direct
C. aggregate
D. static
Which two statements about RSTP are correct? (Choose two.)
A. RSTP is backward compatible with STP.
B. RSTP permits multiple root bridges within a Layer 2 domain.
C. RSTP permits only a single root bridge within a Layer 2 domain.
D. RSTP is not backward compatible with STP.
Which two statements about Martian addresses are correct? (Choose two.)
A. Martian addresses require a route prefix match type.
B. Martian addresses are not installed in the routing table by default.
C. Martian addresses can only be applied to the inet.0 routing table.
D. Martian addresses are installed in the routing table by default.
Click the Exhibit button.You are configuring IS-IS on the newly provisioned ae88 interface. After you commit the configuration, you notice that your adjacency is not showing up. Referring to the exhibit, what is the reason for the adjacency being down?
A. R1 and R2 are configured for different metrics.
B. R1 and R2 are in different IS-IS levels.
C. R1 and R2 have different interface parameters.
D. R1 and R2 are configured for different areas.
Click the Exhibit button.You are attempting to set up IS-IS on a device that has two interfaces (ge-0/0/1.0 and ge-0/0/2.0) in Level 1 and one interface (ge-0/0/0.0) in Level 2; however, it does not participate in either level. Referring to the exhibit, what is the problem?
A. The ge-0/0/0.0 interface must have the Level 1 disable statement removed.
B. The lo0 interface must participate in both levels.С. One of the interfaces requires a network entity title on it.
C. All of the interfaces must have the level disable statement removed.
Which statement about persistent MAC learning is correct?
A. Trunk ports require MAC addresses to be configured on each VLAN.
B. Port moves require manual operator intervention.
C. Access ports must be configured with the no-mac-learning command.
D. 802.1X must be configured on the port for persistent MAC learning to work.
Click the Exhibit button.Referring to the output shown in the exhibit, which two statements are correct? (Choose two.)
A. The device is not an ABR.
B. The device originated the 192.168.1.2 database entry.
C. The device originated the 192.168.1.1 database entry.
D. The device is an ABR.
Click the Exhibit button.You are implementing the network shown in the exhibit. You must ensure that all users can communicate with each other. What are three steps that should be taken in this scenario? (Choose three.)
A. You must specify the appropriate Layer 3 IRB interface under each VLAN.
B. You must define all ports as trunk ports and include all VLANs as members.
C. You must define all ports as access ports and include the appropriate VLAN as a member.
D. You must configure a single logical IRB interface with an IP address for each of the three networks.
E. You must create a unique logical IRB interface for each network and assign an IP address within the appropriate network.
Click the Exhibit button.You are trying to form an IS-IS adjacency between Router A and Router B, but the IS-IS adjacency will not form between the two routers. Referring to the exhibit, which action would solve this problem?
A. Enable level 1 IS-IS routing on Router
B. Enable IS-IS wide metrics on Router
C. Enable level 2 IS-IS routing on Router
D. Enable IS-IS wide metrics on Router
E.
You are asked to configure filter-based forwarding (FBF) to forward traffic sourced from a specific subnet to a webserver. In this scenario, which mechanism is used to add interface routes to the forwarding routing instance used in FBF?
A. generated routes
B. RIB groups
C. forwarding policy
D. routing policy
Click the Exhibit button.You have created a GRE tunnel as shown in the exhibit. The router with tunnel endpoint A is dropping the packets originating from User A and destined to User
A. What would cause this problem?
B. Endpoint A has the internet-options gre-path-mtu-discovery parameter enabled.
C. User A requested fragmentation and Endpoint A has the clear-dont-fragment-bit parameter enabled.
D. Endpoint A is missing a policy statement that allows User A’s traffic into the tunnel.
E. User A is sending maximum size default Ethernet frames with the DF bit enabled.
Which two statements about DIS elections in IS-IS are correct? (Choose two.)
A. If a priority tie occurs, the router with the higher subnetwork point of attachment (SNPA) value becomes the DIS.
B. The router with the higher priority value becomes the DIS.
C. The router with the lower priority value becomes the DIS.
D. If a priority tie occurs, the router with the lower subnetwork point of attachment (SNPA) value becomes the DIS.
You are deploying a new switch configuration at a small branch using EX3400 Series switches. You are concerned about loop prevention. In this scenario, which configuration would you deploy?
A. RSTP
B. EVPN
C. MPLS
D. BPDU
Click the Exhibit button.Referring to the exhibit, the IRB interfaces are configured with which family?
A. irb
B. ethernet-switching
C. inet
D. l3-interface
What is the default route preference for BGP?
A. 150
B. 167
C. 170
D. 179
Click the Exhibit button.You are troubleshooting OSPF issues on your device. You run a trace log and receive the error shown in the exhibit. What would case this error?
A. missing route policy
B. stub area mismatch
C. MD5 authentication error
D. subnet mismatch
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