Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-349) Free Practice Test

Question 1

Which statement about persistent MAC learning is correct?

A. Trunk ports require MAC addresses to be configured on each VLAN.

B. Access ports must be configured with the no-mac-learning command.

C. 802.1X must be configured on the port for persistent MAC learning to work.

D. Port moves require manual operator intervention.

Correct Answer: D

Question 2

Which two statements about the root bridge election process are correct? (Choose two.)

A. The lowest root bridge identifier is preferred over higher root bridge identifiers.

B. The highest root bridge identifier is preferred over lower root bridge identifiers.

C. The highest root bridge priority is preferred over lower root bridge priorities.

D. The lowest root bridge priority is preferred over higher root bridge priorities.

Correct Answer: A,D

Question 3

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 static routes to all IBGP peers.

B. Configure DHCP on all IBGP devices.

C. Configure IBGP peerings to loopback addresses.

D. Configure an IGP within your IBGP network.

Correct Answer: C,D

Question 4

What are three requirements to ensure proper GRE or IP-IP tunnel routing? (Choose three.)

A. Tunnel endpoints must have a route that directs traffic into the tunnel.

B. All intermediary devices must have a route to the tunnel endpoints.

C. Tunnel endpoints must have a valid route to the remote endpoint.

D. Keepalives must be used on stateless tunneling protocols.

E. BGP must be used on intermediate devices.

Correct Answer: A,C,E

Question 5

What are two interarea OSPF LSA types? (Choose two.)

A. Type 1 router LSAs

B. Type 2 network LSAs

C. Type 4 ASBR summary LSAs

D. Type 3 summary LSAs

Correct Answer: C,D

Question 6

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. By default, BPDU protection prevents the root bridge from communicating with other STP members unless it receives a superior BPDU first.

C. BPDU protection prevents unauthorized switches from connecting to and participating in your spanning tree topology.

D. BPDU protection requires that STP or RSTP is configured on the switch.

Correct Answer: A,C

Question 7

You were provided a network diagram that told you to number your network from the 191.255.0.0/16 space. OSPF is enabled and adjacencies are up, but no routers are learning any routes. What can explain this?

A. The default OSPF import policy rejects all OSPF routes, so you need to apply import policy

B. You need to enable OSPF on the lo0 interface to provide a route to the RID of each router in the network

C. The default OSPF export policies advertise nothing, so you need to apply export policy

D. You need to modify the martian table with a 191.255.0.0/16 accept statement

Correct Answer: D

Question 8

Click the Exhibit button.

Which type of route is shown in the exhibit?

A. aggregate

B. static

C. generated

D. direct

Correct Answer: C

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-349) Free Practice Test