JN0-349 Practice Exam Free – 50 Questions to Simulate the Real Exam
Are you getting ready for the JN0-349 certification? Take your preparation to the next level with our JN0-349 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 JN0-349 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 JN0-349 practice exam free questions covering key exam topics. Each question reflects the structure and challenge of the actual exam.
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 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.
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.
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
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.
Which two statements about the root bridge election process are correct? (Choose two.)
A. The highest root bridge priority is preferred over lower root bridge priorities.
B. The highest root bridge identifier is preferred over lower root bridge identifiers.
C. The lowest root bridge priority is preferred over higher root bridge priorities.
D. The lowest root bridge identifier is preferred over higher root bridge identifiers.
Click the Exhibit button.Referring to the exhibit, which router will be selected as the DR?
A. R1
B. R5
C. R4
D. R3
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 two functions of bridging? (Choose two.)
A. blocking
B. aging
C. listening
D. forwarding
Which two statements about the default load-balancing behavior for the Junos OS are correct? (Choose two.)
A. By default, the Junos OS performs a per-packet load-balancing operation.
B. By default, the Junos OS installs multiple equal-cost next hops in the forwarding table for a destination prefix.
C. By default, the Junos OS selects one of the equal-cost next hops for received destination prefixes.
D. By default, all Packet Forwarding Engine slots are assigned the same hash value on the Junos device.
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.
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.
Which statement is correct about access ports?
A. Access ports must have an IRB assigned to accept untagged traffic.
B. By default, access ports accept only VLAN tagged traffic.
C. Access ports must have an IRB assigned to accept VLAN tagged traffic.
D. By default, an access port can have only a single VLAN assigned.
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.
Click the Exhibit button.You have an ESXi host that is connected to ge-0/0/23 on a Juniper EX Series switch. You added a new VM that will also use the same ge-0/0/23 interface. Unfortunately, the new VM is not able to reach external devices. Referring to the exhibit, which command would solve this problem?
A. set vlans default switch-options interface-mac-limit 4
B. set vlans default switch-options interface-mac-limit 5
C. set switch-options interface ge-0/0/23.0 interface-mac-limit 3
D. clear ethernet-switching recovery-timeout interface ge-0/0/23.0
You are configuring IBGP and you must ensure that reachability is maintained between participating routers, even if the physical topology changes. Which two actions should you perform in this scenario? (Choose two.)
A. Configure DHCP on all IBGP devices.
B. Configure an IGP within your IBGP network.
C. Configure static routes to all IBGP peers.
D. Configure IBGP peerings to loopback addresses.
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 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.
Click the Exhibit Button.Referring to the exhibit, which two statements about the BGP connection are correct? (Choose two.)
A. The local device has AS 100 configured but the peer is expecting AS 101.
B. This is an EBGP peering session.
C. This is an IBGP peering session.
D. The local device has AS 101 configured but the peer is expecting AS 100.
If an EX Series switch receives a frame with a known destination MAC address, what is the expected behavior?
A. The frame is sent out all ports assigned to the associated VLAN except the ingress port on which the frame was received.
B. The frame is sent out all ports assigned to all configured VLANs except the ingress port on which the frame was received.
C. The frame is sent out all trunk ports associated with the ingress VLAN regardless of whether a matching MAC address was found in the bridge table.
D. The frame is sent out the egress port with a matching destination MAC address within the bridge table associated with the ingress VLAN.
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.Referring to the exhibit, the IRB interfaces are configured with which family?
A. irb
B. ethernet-switching
C. inet
D. l3-interface
Which three link-specific fields must match between OSPF neighbors before they form an adjacency over a broadcast medium? (Choose three.)
A. router priority
B. hello interval
C. neighbor
D. dead interval
E. options
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.Your company has connections to two ISPs. Each ISP is in a separate routing instance. You need to advertise the 0.0.0.0/0 prefix from both ISPs to all your devices. Referring to the exhibit, which statement is true in this scenario?
A. You must create and apply match input filters on interfaces ge-0/0/2 and ge-0/0/3.
B. You must create a policy to allow traffic from your network to each ISP.
C. You must create an internal routing instance for your network.
D. You must create a RIB group to share interface routes.
What is a purpose for the OSPF database description packet?
A. to transfer the LSA headers between two systems
B. to determine who is in charge of database flushing
C. to transfer the LSUs between two systems
D. to determine who is in charge of adjacency formation
Which protocol supports tunneling of non-IP traffic?
A. GRE
B. SSH
C. IPsec
D. IP-IP
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.
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
Click the exhibit button.Switch-1 in the exhibit receives a packet from User A with a destination MAC address of 00:26:88:02:74:47. Which statement in this scenario is correct?
A. Switch-1 sends the packet out ge-0/0/7 only.
B. Switch-1 sends the packet out ge-0/0/7 and ge-0/0/8.
C. Switch-1 sends the packet out ge-0/0/6, ge-0/0/7, ge-0/0/8, and ge-0/0/9.
D. Switch-1 sends the packet out ge-0/0/7, ge-0/0/8, and ge-0/0/9.
Each PC and IP phone in your network is connected to a switch using the same port. All incoming data traffic is untagged and belongs to the v10 VLAN, while traffic coming from the IP phones is tagged with a VLAN value of 20 and should belong to the v20 VLAN on your switch. In this scenario, which statement is correct?
A. You must enable the voice VLAN feature on the incoming interfaces and assign the v20 VLAN.
B. You must enable an IRB interface and assign it to the v10 and v20 VLANs.
C. You must enable LLDP-MED on the incoming interfaces and assign the v20 VLAN.
D. You must enable the guest VLAN feature on the incoming interfaces and assign the v20 VLAN.
Click the Exhibit button.Why is the route shown in the exhibit hidden?
A. The router cannot reach the protocol next hop.
B. An MPLS LSP is unavailable.
C. The router is being rejected through an import policy.
D. The route is being rejected through an export policy.
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.
Which two statements about Layer 2 firewall filters are correct? (Choose two.)
A. You can apply only one firewall filter term per filter.
B. You can apply only one input filter per VLAN.
C. You can apply multiple firewall filter terms per filter.
D. You can apply multiple input filters per VLAN.
Click the Exhibit button.Referring to the exhibit, which statement is correct?
A. R1 and R2 are elected as DROthers.
B. R3 has the complete OSPF database.
C. R3 and R4 have an adjacency state of Full.
D. R4 is elected as the DR.
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.
You notice that currently two MAC addresses are associated with a single access port in the bridge table of one of your EX Series switches. What are two explanations for this behavior? (Choose two.)
A. The native VLAN feature has been associated with the access port.
B. The mac-move-limit feature has been disabled on the access port,
C. The access port connects to an IP phone which connects ta a host device
D. The access port connects to multiple hosts through a rogue device
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.
What are three reasons a BGP route would be hidden? (Choose three.)
A. The AS Path contains a 0.
B. It is suppressed by a damping policy.
C. The Local Preference is 0.
D. The next hop is unreachable.
E. It is rejected by a firewall term.
Click the Exhibit button.Which type of route is shown in the exhibit?
A. generated
B. direct
C. aggregate
D. static
On EX Series devices, what are two software features that accommodate redundancy? (Choose two.)
A. OAM
B. NSR
C. IGMP
D. GRES
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.
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 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.
Which two statements about Layer 2 loop prevention protocols are correct? (Choose two.)
A. With STP, a designated port can transition to the forwarding state without waiting for the protocol times to expire.
B. STP uses point-to-point and edge port designations.
C. With RSTP, a designated port can transition to the forwarding state without waiting for the protocol times to expire.
D. RSTP uses point-to-point and edge port designations.
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
Click the Exhibit button.Referring to the exhibit, which devices will receive the packet sent by User B?
A. User A and User D
B. User C and User D
C. User C
D. User C, User A, and User D
What are three valid BGP message types? (Choose three.)
A. refresh
B. hello
C. database descriptor
D. keepalive
E. update
Click the Exhibit button.A routing table contains multiple BGP routes to the same destination prefix. The route preference is the same for each route. Referring to the exhibit, which route would be selected?
A. route A
B. route B
C. route C
D. route D
Which two statements about aggregate routes in the Junos OS are correct? (Choose two.)
A. An aggregate route has a default next hop of an IP address.
B. An aggregate route always shows as active in the routing table.
C. An active route can contribute only to a single aggregate route.
D. Only one aggregate route can be configured for each destination prefix.
–
Free Access Full JN0-349 Practice Exam Free
Looking for additional practice? Click here to access a full set of JN0-349 practice exam free questions and continue building your skills across all exam domains.
Our question sets are updated regularly to ensure they stay aligned with the latest exam objectives—so be sure to visit often!
Good luck with your JN0-349 certification journey!