Service Provider Routing and Switching, Specialist (JNCIS-SP) v1.0
Question 1
A service provider receives multiple BGP routes to the same destination prefix. Each route has a different AS path length, but all other attributes are equal.
In this scenario, which statement is correct?
- A. Both routes will be used to forward traffic.
- B. The active route will be randomly selected.
- C. The route with the longest AS path will be selected.
- D. The route with the shortest AS path will be selected.
Answer : D
Question 2
Click the Exhibit button.
You must configure the router called ROUTER_1 to take all valid prefixes learned from internal BGP peers in AS 64523, and then re-advertise them to other internal BGP peers in the same autonomous system.
Referring to the exhibit, which configuration must you deploy on ROUTER_1 to accomplish this task?
- A. Configure ROUTER_1 to belong to a different autonomous system than the other BGP routers in your network.
- B. Configure a routing policy on ROUTER_1 that removes the no-export BGP community from all received prefixes.
- C. Configure ROUTER_1’s internal BGP group with a routing policy that exports prefixes learned from internal BGP.
- D. Configure ROUTER_1’s internal BGP group with the keyword cluster, followed by a unique 32-bit number.
Answer : D
Question 3
Click the Exhibit button.
You have configured an MPLS LSP to 192.168.100.3. However, the LSP is in the down state.
Referring to the exhibit, which two actions would solve this problem? (Choose two.)
- A. Issue the set protocols ospf traffic-engineering command and commit.
- B. Issue the set interfaces lo0 family mpls command on router R1 and commit.
- C. Issue the set protocols mpls label-switched-path to-r3 no-cspf command and commit.
- D. Issue the set routing-options rib inet.3 static route 192.168.100.1 command and commit.
Answer : AC
Question 4
Click the Exhibit button.
Referring to the exhibit, which protocol would automatically create a full mesh of label-switched paths between MPLS-enabled routers?
- A. RSVP
- B. LDP
- C. BFD
- D. BGP
Answer : B
Question 5
Which two statements are correct about TLVs in IS-IS? (Choose two.)
- A. TLVs only support encoding IPv4 routing information.
- B. LSPs can only contain one TLV.
- C. LSPs can contain multiple TLVs.
- D. TLVs allow flexible encoding of routing information.
Answer : CD
Question 6
Which type of PDU is used in IS-IS to get an entire description of all link-state PDUs in the IS-IS database?
- A. Link-State PDU
- B. CSNP
- C. PSNP
- D. IIH
Answer : B
Question 7
Click the Exhibit button.
Referring to the exhibit, R1 and R2 are configured to run IS-IS. The IS-IS adjacency between R1 and R2 is up.
What does the output of the show isis interface command tell you about R1?
- A. R1 advertises a Level 1 metric of 100 and a Level 2 metric of 100 toward R2 in its link-state PDU
- B. R1 only forms a Level 2 adjacency with R2.
- C. R1 sends Level 1 hello PDUs to R2.
- D. R1 is not configured to use wide metrics.
Answer : B
Question 8
Which IS-IS adjacency state indicates that hello packets have been exchanged but the adjacency is not yet fully established?
- A. two-way
- B. loading
- C. initializing
- D. up
Answer : C
Question 9
In an OSPF network, what is a purpose of a designated router?
- A. to flood routes to all other OSPF devices in the entire domain
- B. to forward traffic within the configured subnet
- C. to reduce OSPF traffic on the OSPF segment
- D. to assign an OSPF router ID to all routers in the OSPF segment
Answer : C
Question 10
Which OSPF packet type is used to initiate and maintain neighbor relationships?
- A. Database Description
- B. hello
- C. Link-State Update
- D. Link-State Acknowledgment
Answer : B
Question 11
You are configuring BGP on a Juniper router to peer with an external provider. After committing the configuration, the BGP session remains in the Idle state.
Which configuration issue would prevent the BGP session from progressing beyond the Idle state?
- A. The local AS number is higher than the peer's AS number.
- B. The peer IP address is unreachable
- C. The BGP group type is set to internal instead of external.
- D. The peer is configured with a different router ID.
Answer : B
Question 12
You are designing a high availability solution for a Juniper router with dual Routing Engines (RE). You want to ensure that the routing protocol state is preserved during an RE switchover. You have already enabled graceful Routing Engine switchover (GRES) and you want to avoid relying on helper routers to maintain the routing protocol state.
In this scenario, which feature would accomplish this behavior?
- A. bidirectional forwarding detection
- B. non-stop active routing
- C. graceful restart
- D. non-stop active bridging
Answer : B
Question 13
You are configuring BGP for IPv6 operations.
In this scenario, which two statements are correct? (Choose two.)
- A. The Autonomous System Number (ASN) can be either a 32-bit or 64-bit value.
- B. The router ID uses a 128-bit identifier value.
- C. The router ID uses a 32-bit identifier value.
- D. The Autonomous System Number (ASN) must be a 64-bit value.
Answer : C
Question 14
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The switch1 device is using VSTP.
- B. The switch1 device is the root bridge.
- C. The ge-0/08, ge-0/0/9, and ge-0/0/11 interfaces are using the default interface priority.
- D. The bridge priority for switch 1 is 32k.
Answer : BD
Question 15
Which statement about RSVP-signaled LSPs is correct?
- A. CSPF is used to calculate the path for a traffic-engineered LSP.
- B. CSPF is not required for LSPs using admin-groups.
- C. The paths used by LSPs are always calculated using the SRGB.
- D. The paths used by LSPs are always calculated using the TED.
Answer : A