JNCIS-SP Voucher Assessment [PDF]

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Q1 Referring to the exhibit, which community value is assigned to the aggregate route 172.30.0.0/25?



A. 1 :888 B. 1:777 C. 1 :999 D. 1 :000 Answer: B Q2



Referring to the exhibit, which two statements are correct? (Choose two.) A. The router will install the 0.0.0.0/0 route into the routing table when no BGP prefixes are present B. The router will remove the 0.0.0.0/0 route from the routing table when no BGP prefixes are present C. The router will remove the 0.0.0.0/0 route from the routing table when any BGP prefixes are present D. The router will install the 0.0.0.0/0 route into the routing table when any BGP prefixes are present Answer: B,D Q3 By default, which three fields are used in the ECMP load-balancing algorithm for Layer 3 IPv4 traffic? (Choose three.) A. incoming interface index B. source port



C. protocol D. outgoing interface index destination address E. Destination address Answer: A,C,E Q4



Referring to the configuration shown in the exhibit, which statement is true? A. Traffic destined to address 192.168.5.1 will take next-hop 172.16.1.2. B. Traffic destined to address 192.168.5.1 will alternate between next-hops 172.16.1.2 and 172.16.1.3 C. Traffic destined to address 192.168.5.1 will take next-hop 10.0.1.1. D. Traffic destined to address 192.168.5.1 will take next-hop 172.16.1.3. Answer: D Q5 What is the correct description of an Area Border Router (ABR)? A. An ABR is an OSPF router with links in two areas, connecting OSPF areas to the backbone B. An ABR is an OSPF router that injects routing information from outside the OSPF AS C. An ABR is an OSPF router with at least one link in a Layer 2 area D. An ABR is an OSPF router with all of its links within an area Answer: A Q6 Which two benefits does configuring an OSPF point-to-point interface provide? (Choose two.) A. An OSPF point-to-point interface maintains an always up interface status. B. An OSPF point-to-point interface suppresses the advertisement of LSAType 2 messages. C. An OSPF point-to-point interface enables CoS on the configured interface. D. An OSPF point-to-point interface reduces the time to form an adjacency. Answer: B,D Q7



You are constructing a new network with four routers coming online simultaneously. Each router successfully sends a hello packet within 40 seconds. Referring to the exhibit, which OSPF router will be elected as the designated router?



A. R1 B. R2 C. R3 D. R4 Answer: R4 Q8 Referring to the exhibit, which statement is correct?



A. Interface xe-0/0/0.0 can only form a single adjacency. B. Interface ge-1 /0/0.0 can only form a single adjacency. C. Interface xe-0/0/0.0 has a default metric of 10. D. Interface ge-3/0/0.0 has a default metric of 10. Answer: B Q9 Referring to the exhibit, what is required to establish an IS-IS adjacency between these two routers?



A. The interface connecting the two routers must be configured as a Level 1 interface. B. The interface connecting the two routers must be configured as a Level 2 interface. C. Router A must be configured as the designated intermediate system (DIS). D. Both routers will require wide metrics to be enabled. Answer: B Q10 You are building a new network using the IS-IS protocol. The network design calls for a 1 GbE interface to have a cost of 100, and a 10GbE interface to have a cost of 10. Which statement is correct? A. Jumbo frames must be enabled on all interfaces. B. All routers in the network must be configured for Level 2 only. C. Wide metrics must be enabled on all IS-IS routers. D. The links between two 10GbE interfaces must have Level 1 disabled. Answer: C Q11 Which two statements are correct about default BGP route propagation? (Choose two.) A. EBGP speakers advertise IBGP-learned routes to other EBGP peers. B. BGP speakers advertise IBGP-learned routes to other IBGP peers. C. EBGP speakers advertise IBGP-learned routes to other EBGP peers by using a policy. D. IBGP speakers advertise EBGP-learned routes to other IBGP peers. Answer: A,C Q12



Referring to the exhibit, which two statements are true? (Choose two.) A. The "multihop" statement is required for the BGP session to establish correctly. B. The "local-address" statement is required for the BGP session to establish correctly. C. The configuration is for an internal BGP session. D. The configuration is for an external BGP session. Answer: BC Q13 You are troubleshooting a new BGP peering session which is not establishing. Referring to the exhibit, which statement is true?



A. The TCP session is not establishing. B. The update messages contain an unsupported option. C. The neighbor does not support IPv6. D. The peer's AS number is misconfigured. Answer: D Q14 According to Juniper Networks, what are two reasons to peer using loopback addresses when configuring BGP? (Choose two.)



A. When establishing a single-link EBGP connection. B. When establishing an IBGP connection. C. When routers are not directly connected. D. When routers are not in the same autonomous system. Answer: B,C Q15 Referring to the exhibit, which two statements are true? (Choose two.)



A. The BGP peering between R1 and R4 should use physical interface addresses. B. The BGP peerings between R1, R2, and R3 should use physical interface addresses. C. The BGP peerings between R1, R2, and R3 should use loopback interface addresses. D. The BGP peering between R1 and R4 should use loopback interface addresses. Answer: A, C Q16 You are configuring an IBGP group. When you commit your configuration, you receive the error shown in the exhibit. Which additional configuration parameter must you add to your configuration? [edit protocols] 'bgp' Error in neighbor 192.168.1.2 of group my-int-group: peer AS number must be configured for an external peer error: configuration check-out failed



A. multipath B. export C. type internal D. type external Answer: D (The assessment says it’s wrong) – type external wrong too ?!! Multipath wrong Q17



Your router has an external peering session to 10.10.25.5 and several internal peers. However, routes learned from EBGP peers are showing up in a hidden state on IBGP peers. Where would you apply the policy shown in the exhibit to solve this issue? A. Apply the next-hop-self as an export policy to the internal BGP peers. B. Apply the next-hop-self as an import policy to the internal BGP peers. C. Apply the next-hop-self as an import policy to the external BGP peers. D. Apply the next-hop-self as an export policy to the external BGP peers. Answer: A Q18 Which two BGP attributes are mandatory? (Choose two.) A. aggregator B. next hop C. community D. AS path Answer: BD Q19 Which three attributes are well-known mandatory BGP attributes? (Choose three.) A. MED B. origin C. AS path D. next-hop E. local preference Answer: BCD Q20 You have two MX Series devices connected together and configured for Layer 2 operations. The interface that connects the two routers must carry tagged and untagged traffic. Which approach would meet this objective? A. Configure the interfaces as access ports with the native VLAN option. B. Configure the interfaces as trunk ports with the voice VLAN option.



C. Configure the interfaces as trunk ports with the native VLAN option. D. Configure the interfaces as access ports with the voice VLAN option. Answer: C Q21



Referring to the exhibit, you are asked to configure automatic pruning and creating of VLANs. Which two statements will accomplish this task? (Choose two.) A. MVRP is configured on all three switches. B. The interfaces between the switches must be access ports. C. The interfaces between the switches must be trunk ports D. MVRP is configured only on the spine. Answer: AC The configuration used to enable MVRP is illustrated. Note that MVRP is only enabled on the trunk ports of all participating switches. Once MVRP is enabled, dynamic VLAN configuration information will be shared and created on participating switches. You can disable dynamic VLAN configuration using the no-dynamic-vlan statement Note that MVRP registration and updates are controlled by timers, which are part of MRP. These timers are set on a perinterface basis and define when MVRP PDUs can be sent and when MVRP information can be updated. Click the Additional Information button to learn more about adjusting MVRP timer values.



Q22 Which action would you use to connect two virtual switches that are configured on the same router?



A. Create a VRF routing instance B. Create a forwarding routing instance C. Connect the virtual switches with a cable D. Configure an irb interface



Answer: C Q23



You are asked to implement STP protection on your switches to prevent end-hosts from sending BPDU messages to the network Referring to the exhibit, which method must be used to achieve the goal? A. On S1 and S2 switches, set all interfaces pointing to the end-hosts as an edge port. B. On S1 and S2 switches, configure BPDU protection for all interfaces pointing to the end-hosts. C. On S3, configure root-protection for all interfaces pointing to the S1 and S2 switches.



D. On all switches, configure loop-protection for all interfaces pointing to the adjacent switch. Answer: B Q24 You want to ensure that access switches on your network cannot transition to a root bridge state, while maintaining your carefully designed and implemented spanning-tree topology. Which feature would you deploy on interfaces connected to your access switches? A. loop protection B. BPDU protection C. storm control D. root protection Answer: D Q25 In which situation would you disable penultimate-hop popping? A. When you want to bypass a penultimate router that does not support IPv6 tunneling B. When you want to ensure the penultimate router can perform the destination route lookup C. When you want to enforce the same class-of-service behavior through the entire LSP D. When you want to utilize a penultimate router that supports IPv6 tunneling Answer: C Q26 By default, which router in an MPLS LSP removes the MPLS header? A. penultimate router B. ultimate router C. ingress router D. egress router Answer: A Q27



Referring to the exhibit, which two statements true? (Choose two.) A. If the R6-first path is up and active, the R6-secondary path is up but not active. B. If the R6-first path is up and not active, the R6-secondary path is up and active. C. If the R6-first path is up and active, the R6-secondary path is down. D. If the R6-first path is down, the R6-secondary path is up and active. Answer: AD Q28 An RSVP-enabled router receives an RSVP reservation message for a new RSVP path. The router is unable to accommodate the reservation request. Which action does the router take? A. The router sends a ResvErr message to the downstream router. B. The router sends a ResvTear message to the downstream router. C. The router sends a ResvTear message to the upstream router. D. The routers sends a ResvErr message to the upstream router. Answer: B Q29



Referring to the exhibit, which statement is true? A. The router will prune links with insufficient bandwidth from the path before beginning the signaling process. B. The router will precalculate a valid path through the network for LSP r1 -to-r3. C. The router will analyze the traffic engineering database to determine the best path through the network. D. The router will attempt to signal the LSP along the IGP shortest path to 192.168.100.1. Answer: D Q30 In the exhibit, which configuration is correct when setting up LDP for R1?



A. set protocols mpls interface ge-0/0/0.0 set protocols Idp interface ge-0/0/0.0 B. set interfaces ge-0/0/0 unit 0 family mpls set protocols mpls interface ge-0/0/0.0 set protocols Idp interface ge-0/0/0.0 C. set interfaces ge-0/0/0 unit 0 family mpls set protocols Idp interface ge-0/0/0.0 D. set interfaces ge-0/0/0 unit 0 family mpls set protocols mpls interface ge-0/0/0.0 Answer: B Q31



You are using RSVP in your network to signal MPLS LSPs. You are asked to ensure that the egress MPLS router receives the full label stack, containing both the hop-by-hop and VPN label. Which configuration will satisfy this requirement? A. Use the set protocols mpls expand-loose-hop command. B. Apply set protocols rsvp interface no-aggregate to the egress interface. C. Use the set protocols rsvp keep-multiplier command. D. Use the set protocols mpls explicit-null command. Answer: D Q32 Which three statements are true about RSVP LSPs configured with the fast-reroute statement on Junos devices? (Choose three.) A. Fast-reroute can detour around node or link failures. B. Fast-reroute is configured only on the egress router. C. The ingress node does not signal a new path after a fast reroute detour happens. D. Detour paths are immediately available. E. Fast-reroute uses the traffic engineering database to calculate the detours. Answer: ADE Q33 An established RSVP-signaled LSP suffers a link failure. What is one action taken by the local RSVPenabled router? A. A ResvTear message is sent downstream. B. A ResvErr message is sent upstream. C. A ResvErr message is sent downstream. D. A ResvTear message is sent upstream. Answer: D Q34 Which three IPv6 addresses are valid equivalents for the address 2001:0000:0000:0000:0134:fc0e:cc8b:458a? (Choose three?) A. 2001:134:fc0e:cc8b:458a



B. 2001:0:0:0134:fc0e:cc8b:458a



C. 2001:0::0:134:fc0e:cc8b:458a



D. 2001::134:fc0e:cc8b:458a



E. 2001:0:0:0:0134:fc0e:cc8b:458a



Answer: B,D,E Q35



Your co-worker configures the ge-0/0/0 interface with an IPv6 address of 2001:db8:0:9::/64. After committing the configuration, your co-worker executes the command shown in the exhibit. What is the fe80::206:aff:fe0e:e01/64 address in this scenario? A. the loopback address B. the multicast address C. the statically assigned address D. the link-local address Answer: D Q36 Which three statements are true about GRE? (Choose three.) A. Tunnel endpoints must have a route that directs traffic into the tunnel. B. All intermediary devices must have reachability to the tunnel endpoints. C. Tunnel endpoints require a tunnel interface. D. Tunnel endpoints must have a route to the remote endpoint learned by a dynamic routing protocol. E. Tunnel endpoints must use the loopback interface for reachability. Answer: ABC Q37



Referring to the exhibit, the GRE tunnel between R-1 and R2 allows connectivity between User-1 and Server-1. User-1 can communicate with Server-1 with packets that are up to 1448 bytes in size.



However, if the packet size is larger than 1448, User-1 cannot communicate with Server-1. In this scenario, how do you solve the communication problem? A. Change the physical MTU on the ge-0/0/3 interfaces on R-1 and R-2 to 1448 bytes. B. Change the physical MTU on the gr-0/0/0 interfaces on R-1 and R-2 to 1448 bytes. C. Apply the allow-fragmentation statement to the GRE tunnel configuration. D. Apply the path-mtu-discovery statement to the GRE tunnel configuration. Answer: C Q38 You set up VRRP on your Ethernet segment. You must ensure that when a new router comes online with a higher priority it does not take over VRRP mastership. Which configuration element accomplishes this task? A. preempt B. no-accept-data C. no-preempt D. track Answer: C Q39 Referring to the exhibit, how many milliseconds must pass before the interface ge-0/0/1.0 is considered down?



A. 1200 ms B. 900 ms C. 1600 ms D. 2400 ms Answer: A Q40 Which two statements are true about NSR? (Choose two.) A. NSR requires graceful restart to function properly B. NSR requires redundant REs. C. NSR requires only one RE. D. NSR requires GRES to function properly. Answer: B,D