Free JN0-349 Sample Questions — Enterprise Routing and Switching, Specialist (JNCIS-ENT)

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 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. RIB group must contain one or more export-rib statements
• D. RIB group must contain one or more import-rib statements

Your BGP router receives routes from two upstream ISPs: ISP A and ISP B. In this scenario, which change would you make to prefer routes from ISP A?

• A. Set the local-preference attribute for all routes received from ISP A to 200 while all routes received from ISP B use the default local-preference value of 100
• B. Prepend the AS path to all routes received from ISP A while all routes received from ISP B use the default AS path value
• C. Change the MED value for all routes received from ISP A to 1 while all routes from ISP B remain configured with no MED value
• D. Set the local-preference attribute for all routes received from ISP A to 50 while all routes received from ISP B use the default local-preference value of 100

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

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

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

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 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

Which two statements about a Virtual Chassis are correct? (Choose two.)

• 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