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Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q10-Q15):

NEW QUESTION # 10
Exhibit.

Referring to the exhib.t, what must be changed to establish a Level 1 adjacency between routers R1 and R2?

A. Remove the level i disable parameter under the R2 protocols isis interface loo . 0 configuration hierarchy.
B. Change the level 1 disable parameter under the R2 protocols isis interface ge-1/2/3 .0 hierarchy to the level 2 disable parameter
C. Change the level l disable parameter under the R1 protocols isis interface lo0.0 hierarchy to the level 2 disable parameter.
D. Add IP addresses to the interface ge-l/2/3 unit 0 family iso hierarchy on both R1 and R2.

Answer: A

Explanation:
Explanation
IS-IS routers can form Level 1 or Level 2 adjacencies depending on their configuration and network topology.
Level 1 routers are intra-area routers that share the same area address with their neighbors. Level 2 routers are inter-area routers that can connect different areas. Level 1-2 routers are both intra-area and inter-area routers that can form adjacencies with any other router.
In the exhibit, R1 and R2 are in different areas (49.0001 and 49.0002), so they cannot form a Level 1 adjacency. However, they can form a Level 2 adjacency if they are both configured as Level 1-2 routers. R1 is already configured as a Level 1-2 router, but R2 is configured as a Level 1 router only, because of the level 1 disable command under the lo0.0 interface. This command disables Level 2 routing on the loopback interface, which is used as the router ID for IS-IS.
Therefore, to establish a Level 1 adjacency between R1 and R2, the level 1 disable command under the R2 protocols isis interface lo0.0 hierarchy must be removed. This will enable Level 2 routing on R2 and allow it to form a Level 2 adjacency with R1.

NEW QUESTION # 11
Exhibit

Which two statements are true about the OSPF adjacency displayed in the exhibit? (Choose two.)

A. There is a mismatch in the poll interval parameter between routers R1 and R2.
B. There is a mismatch in the dead interval parameter between routers R1 and R2.
C. There is a mismatch in the hello interval parameter between routers R1 and R2
D. There is a mismatch in the OSPF hold timer parameter between routers R1 and R2.

Answer: B,C

Explanation:
The hello interval is the time interval between two consecutive hello packets sent by an OSPF router on an interface. The dead interval is the time interval after which a neighbor is declared down if no hello packets are received from it. These parameters must match between two OSPF routers for them to form an adjacency. In the exhibit, router R1 has a hello interval of 10 seconds and a dead interval of 40 seconds, while router R2 has a hello interval of 30 seconds and a dead interval of 120 seconds. This causes a mismatch and prevents them from becoming neighbors23.

NEW QUESTION # 12
When building an interprovider VPN, you notice on the PE router that you have hidden routes which are received from your BGP peer with family inet labeled-unica3t configured.
Which parameter must you configure to solve this problem?

A. Under the family inet labeled-unicast hierarchy, add the explicit null parameter.
B. Under the family inet labeled-unicast hierarchy, add the resolve-vpn parameter.
C. Under the protocols mpls hierarchy, add the traffic-engineering parameter
D. Under the protocols ospf hierarchy, add the traffic-engineering parameter.

Answer: B

Explanation:
Explanation
The resolve-vpn parameter is a BGP option that allows a router to resolve labeled VPN-IPv4 routes using unlabeled IPv4 routes received from another BGP peer with family inet labeled-unicast configured. This option enables interprovider VPNs without requiring MPLS labels between ASBRs or using VRF tables on ASBRs. In this scenario, you need to configure the resolve-vpn parameter under [edit protocols bgp group external family inet labeled-unicast] hierarchy level on both ASBRs.

NEW QUESTION # 13
Which statement is correct about IS-IS when it performs the Dijkstra algorithm?

A. The algorithm will stop processing once the tree database is empty.
B. Tuples with the lowest cost are moved from the tree database to the LSDB.
C. The local router moves its own local tuples into the candidate database
D. When a new neighbor ID in the tree database matches a router ID in the LSDB, the neighbor ID is moved to the candidate database

Answer: C

Explanation:
IS-IS is a link-state routing protocol that uses the Dijkstra algorithm to compute the shortest paths between nodes in a network. The Dijkstra algorithm maintains three data structures: a tree database, a candidate database, and a link-state database (LSDB). The tree database contains the nodes that have been visited and their shortest distances from the source node. The candidate database contains the nodes that have not been visited yet and their tentative distances from the source node. The LSDB contains the topology information of the network, such as the links and their costs.
The Dijkstra algorithm works as follows:
The local router moves its own local tuples into the tree database. A tuple consists of a node ID, a distance, and a parent node ID. The local router's tuple has a distance of zero and no parent node.
The local router moves its neighbors' tuples into the candidate database. The neighbors' tuples have distances equal to the costs of the links to them and parent node IDs equal to the local router's node ID.
The local router selects the tuple with the lowest distance from the candidate database and moves it to the tree database. This tuple becomes the current node.
The local router updates the distances of the current node's neighbors in the candidate database by adding the current node's distance to the link costs. If a shorter distance is found, the parent node ID is also updated.
The algorithm repeats steps 3 and 4 until either the destination node is reached or the candidate database is empty.

NEW QUESTION # 14
Referring to the exhibit, you must provide VRF Internet access over a single connection for VPN- A Site 1, which connects to PE-1.
Which two statements are correct in this scenario? (Choose two.)

A. You do not need to use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.
B. You do not need to use the RIB group default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.
C. You must use the RIB group to move a default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.
D. You must use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.

Answer: A,C

NEW QUESTION # 15
......

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Bill Collins Bill Collins

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