JN0-660 Exam Questions

What is the purpose of a trunk link?

What are two differences between RSTP and VSTP? (Choose two.)

A rogue switch has been added to your network, exchanged BPDUs, and is now part of the spanning tree topology. Which feature would help prevent this from happening in the future?

What is the maximum number of MSTIs supported in an MST region?

Which two statements are true about STP and RSTP? (Choose two.)

What are two types of BPDUs in the Spanning Tree Protocol? (Choose two.)

You are asked to establish an MPLS LSP between two sites. You are required to ensure the LSP traverses specific routers within your network. Which solution is correct?

Which statement is correct about the inet.3 routing table?

Which two statements are correct about default MPLS behavior on Junos devices? (Choose two.)

Which two statements regarding the MPLS label information base are correct? (Choose two.)

Which two statements are correct about RSVP path messages? (Choose two.)

Which two statements are correct regarding LDP-signaled VPLS instances? (Choose two.)

Which two statements are correct regarding LDP-signaled Layer 2 circuits? (Choose two.)

Which two statements are correct regarding BGP-signaled Layer 2 VPNs? (Choose two.)

Which two statements regarding VRF tables are correct? (Choose two.)

You have been asked to implement routing policy on the PE devices in your AS and to ensure the correct customer routes are installed in the appropriate VRF tables. Which component...

What is the purpose of a route target community in a Layer 3 VPN?

You have been asked to deploy a Layer 2 VPN for a new customer. What information will be present in the PE's associated VPN forwarding table? (Choose three.)

You have an established Layer 3 VPN where you are using static routing between your PE and CE devices. You must advertise their directly connected subnet to remote PE devices. Whic...

You have been asked to verify the state of an LDP-signaled Layer 2 circuit. Which two commands would you use to verify the state of the connection? (Choose two.)

What are two valid IPv6 addresses? (Choose two.)

Which new field is added to the IPv6 header when compared to IPv4?

Which three are valid IPv6 extension headers? (Choose three.)

What are two components of an IPv6 router advertisement message? (Choose two.)

Which two statements are correct about neighbor discovery in IPv6? (Choose two.)

You want to configure an interface on your router to use an IPv6 global IP address. Which three methods accomplish this task? (Choose three.)

Which two support tunneling for non-IP protocols on Junos devices? (Choose two.)

Which two support the tunneling of IP traffic on Junos devices? (Choose two.)

Which two statements are true regarding GRE tunnels? (Choose two.)

Which two statements are true regarding GRE tunnel overhead? (Choose two.)

Click the Exhibit button. You are advertising the route in the exhibit to your OSPF neighbors. What happens if the 10.0.0.0/16 route is unavailable? user@router> show route 0/0 exa...

Click the Exhibit button. You have been asked to configure per-packet load balancing. Referring to the exhibit, which configuration correctly applies the load-balancing policy? [ed...

Referring to the exhibit, what is the result of the RIB group configuration? [edit] user@router# show routing-options rib-groups { test { import-rib [ walter.inet.0 nancy.inet.0 ];...

Referring to the exhibit, which statement is correct? {master}[edit] user@router-RE0# run show task replication Stateful Replication: Enabled RE modE. Master Protocol Synchronizati...

You have been asked to determine if an NSR switchover will be hitless for a given BGP peer. Referring to the exhibit, which statement is true? {master}[edit] user@router-RE0# run s...

Click the Exhibit button. R1 and R2 are using VRRP for high availability. Referring to the exhibit, which two statements are correct about the configuration? (Choose two.) user@R1>...

Click the Exhibit button. The router was just powered on. Referring to the exhibit, what is the OSPF RID? interfaces { ge-1/0/3 { unit 0 { family inet { address 192.168.1.1/30; } }...

Referring to the exhibit, what is the resulting behavior on interface ge-1/0/0? protocols { isis { level 1 disable; interface ge-1/0/0.0 { level 2 disable; } interface ge-1/1/0.0;...

Referring to the exhibit, which two statements are true regarding the GE interface? (Choose two.) [edit] user@router# run show isis interface IS-IS interface database: Interface L...

R1 and R2 have a Level 1 IS-IS adjacency. R2 participates in both Level 1 and Level 2, and is receiving routes from a Level 2 neighbor. A policy on R2 has been created to leak rout...

Referring to the exhibit, R1 and R2 are directly connected using interface ge-1/1/0. What happens as a result of the configurations? user@R1> show interfaces { ge-1/1/0 { unit 0 {...

Referring to the exhibit, R1 and R2 are directly connected using interface ge-1/1/0. What is the reason the IS-IS adjacency fails? user@R1> show interfaces { ge-1/1/0 { unit 0 { fa...

Referring to the BGP peering sessions shown in the exhibit, which two statements are true? (Choose two.) [edit] user@router> show bgp summary ... Peer AS InPkt OutPkt OutQ Flaps La...

Click the Exhibit button. Two newly configured BGP peers have remained in the states shown in the exhibit for several hours. Which two statements are true? (Choose two.) user@route...

Referring to the exhibit, why is the 200.1.0.0/16 prefix failing to be advertised in BGP? user@router# run show route advertising-protocol bgp 192.168.12.1 user@router# run show ro...

Click the Exhibit button. R2 is exporting static routes to R1 using BGP. R1 is not receiving one of the five static routes that is configured on R2. Referring to the exhibit, what...

Click the Exhibit button. You are asked to configure a new external BGP peering. You have configured BGP on R1 as shown in the exhibit, however the BGP peering remains in Active st...

You are asked to configure an EBGP peering to AS 65002. The EBGP peering is stuck in a Connect state. Referring to the exhibit, what should be changed to the BGP configuration to b...

Click the Exhibit button. You have been asked to configure an EBGP peering to AS 65002. The EBGP peering is stuck in an Active state. Referring to the exhibit, what would be change...

Click the Exhibit button. In the exhibit, A1 sends a broadcast frame with destination MAC address FFFF.FFFF.FFFF, and all other stations have sent a response . What would be the co...