JN0-349 Practice Test Free – 50 Questions to Test Your Knowledge
Are you preparing for the JN0-349 certification exam? If so, taking a JN0-349 practice test free is one of the best ways to assess your knowledge and improve your chances of passing. In this post, we provide 50 free JN0-349 practice questions designed to help you test your skills and identify areas for improvement.
By taking a free JN0-349 practice test, you can:
- Familiarize yourself with the exam format and question types
- Identify your strengths and weaknesses
- Gain confidence before the actual exam
50 Free JN0-349 Practice Questions
Below, you will find 50 free JN0-349 practice questions to help you prepare for the exam. These questions are designed to reflect the real exam structure and difficulty level.
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.
On EX Series devices, what are two software features that accommodate redundancy? (Choose two.)
A. OAM
B. NSR
C. IGMP
D. GRES
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
Which two statements about a unified ISSU are correct? (Choose two.)
A. It requires that Bidirectional Forwarding Detection be disabled.
B. It requires that graceful Routing Engine switchover be enabled.
C. It is only supported on platforms with redundant control planes.
D. It is only supported on platforms with redundant power supplies.
Which two statements are true about GRE tunnels on Junos devices? (Choose two.)
A. Only one GRE tunnel can be included for each logical unit.
B. Multiple GRE tunnels can be included for each logical unit.
C. GRE interfaces can include multiple logical units.
D. GRE interfaces can include only a single logical unit.
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
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 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.
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.
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 two statements concerning IS-IS adjacencies are correct? (Choose two.)
A. For Level 1 adjacencies, the area IDs can be different.
B. For Level 2 adjacencies, the area IDs can be different.
C. Level 2 routers can form an adjacency with Level 1 routers.
D. Level 2 routers do not form adjacencies with Level 1 routers.
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.
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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 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.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.
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 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.
Which OSPF area type receives only the default route from the backbone?
A. transmit area
B. totally stubby area
C. not so stubby area
D. stub area
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.
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, 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.
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 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 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.
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
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.
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
Click the Exhibit button.Which type of route is shown in the exhibit?
A. generated
B. direct
C. aggregate
D. static
What are two Layer 2 firewall filter types? (Choose two.)
A. port-based
B. packet-based
C. flow-based
D. VLAN-based
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 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.
You are concerned that someone from outside the company could use an open conference room port to access the network. Which feature should you use to address this concern?
A. persistent MAC learning
B. 802.1X
C. DHCP snooping
D. MAC limiting
What are two functions of bridging? (Choose two.)
A. blocking
B. aging
C. listening
D. forwarding
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.
What are three valid BGP message types? (Choose three.)
A. refresh
B. hello
C. database descriptor
D. keepalive
E. update
Click the Exhibit button.Referring to the exhibit, which statement is correct?
A. The router is acting as the DR.
B. The router is acting as the BDR.
C. The router is acting as a DROther.
D. The router is not able to establish an adjacency.
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.
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.
You have a VLAN with two devices acting as a single gateway for hosts. In this scenario, which protocol would provide a single gateway IP for the hosts?
A. VRRP
B. OSPF
C. IS-IS
D. BGP
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
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.
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.
Click the Exhibit button.You are responsible for managing a Layer 2 network using RSTP for loop prevention. You recently committed the configurations shown in the exhibit. Unfortunately, Switch-2 became the root bridge and you must ensure that Switch-1 becomes the root bridge, when available, for this RSTP topology. Referring to the exhibit, which configuration change should be performed?
A. Configure the ge-0/0/1 and ge-0/0/8 interfaces on Switch-1 to have a priority of 255.
B. Configure the system MAC on Switch-1 to be higher than the other two switches.
C. Configure the bridge-priority on Switch-1 as 4k.
D. Configure the ge-0/0/1 and ge-0/0/8 interfaces on Switch-1 to have a cost of 0.
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.
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
Which two port security mechanisms rely on an accurate DHCP snooping database to operate correctly? (Choose two.)
A. IP source guard
B. persistent MAC learning
C. MACsec
D. dynamic ARP inspection
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.
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.
Click the Exhibit button.Referring to the exhibit, which port on Switch-2 will be selected as the RSTP root port?
A. ge-0/0/8.0
B. ge-0/0/9.0
C. ge-0/0/10.0
D. ge-0/0/1.0
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