Free JN0-664 Sample Questions — Service Provider Routing and Switching, Professional (JNCIP-SP)

Which statement is true regarding BGP FlowSpec?

• A. It is used to protect a network from denial-of-service attacks dynamically
• B. It uses dynamically created routing policies to protect a network from denial-of-service attacks
• C. It uses a remote triggered black hole to protect a network from a denial-of-service attack
• D. It verifies that the source IP of the incoming packet has a resolvable route in the routing table

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-unicast configured. Which parameter must you configure to solve this problem?

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

You want to ensure that a single-area OSPF network will be loop free. In this scenario, what are two requirements that satisfy this requirement? (Choose two.)

• A. The DR/BDR ensures that each node within an area has the same information in their LSDBs
• B. The Shortest Path First algorithm must prune looped paths
• C. Nodes within an area must connect in a full mesh
• D. All nodes within an area must have the same information in their LSDBs

You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. Your PE-2 device connects to two sites within the same VPN. In this scenario, which statement is correct?

• A. You must create a unique Layer 2 VPN routing instance for each site on the PE-2 device
• B. By default on PE-2, the site’s local ID is automatically assigned a value of 0 and must be configured to match the total number of attached sites
• C. You must use separate physical interfaces to connect PE-2 to each site
• D. By default on PE-2, the remote site IDs are automatically assigned based on the order that you add the interfaces to the site configuration

You are using a Layer 3 VPN to connect two customer sites. The VPN routes for the customer networks appear as hidden in the bgp.l3vpn.0 routing table on the PE routers. What is causing this problem?

• A. The routes use overlapping IP addresses
• B. There is a routing loop in the service provider backbone
• C. There is not an established MPLS LSP between the two PE routers
• D. Route targets are not configured

You are a network architect for a service provider and want to offer Layer 2 services to your customers. You want to use EVPN for Layer 2 services in your existing MPLS network. Which two statements are correct in this scenario? (Choose two.)

• A. Segment routing must be configured on all PE routers
• B. EVPN uses Type 2 routes to advertise MAC address and IP address pairs learned using ARP snooping
• C. EVPN uses Type 3 routes to join a multicast tree to flood traffic
• D. VXLAN must be configured on all PE routers

Which two statements are correct about VPLS tunnels? (Choose two.)

• A. BGP-signaled VPLS tunnels require manual provisioning of sites
• B. LDP-signaled VPLS tunnels only support control bit 0
• C. LDP-signaled VPLS tunnels use auto-discovery to provision sites
• D. BGP-signaled VPLS tunnels can use either RSVP or LDP between the PE routers

You have an L2VPN connecting two CEs across a provider network that runs OSPF. You have OSPF configured on both CEs. Which two statements are correct in this scenario? (Choose two.)

• A. OSPF neighborship is formed between the CEs and PEs
• B. OSPF neighborship is formed between the two CEs
• C. The CE and PE OSPF areas must match
• D. The CE and PE OSPF areas can be different

You are configuring anycast RP for load balancing and redundancy in your PIM-SM domain. You want to share active sources between RPs. In this scenario, what are two solutions that will accomplish this task? (Choose two.)

• A. Configure MSDP on each RP router
• B. Configure anycast PIM with the rp-set statement on each RP router
• C. Configure anycast PIM with the rp-set statement on each source DR router
• D. Configure MSDP on each source DR router

Which three statements about IS-IS in a multi-area network are correct? (Choose three.)

• A. Internal L1 PDUs are flooded to all L1 routers in other areas
• B. External L2 PDUs are only flooded to the local area’s L2 routers
• C. Internal L1 PDUs are flooded to the local area’s L2 routers
• D. External L2 PDUs are flooded to all L2 routers in other areas
• E. Internal L1 PDUs are only flooded to the local area's L1 routers

Which two statements about IS-IS are correct? (Choose two.)

• A. CSNPs are flooded periodically
• B. PSNPs are flooded periodically
• C. PSNPs contain only descriptions of LSPs
• D. CSNPs contain only descriptions of LSPs

You must alter class-of-service values in packets on the outbound interface of an edge router. In this scenario, which CoS component allows you to accomplish this task?

• A. output policer
• B. scheduler
• C. rewrite rules
• D. forwarding classes

When using 0SPFv3 for an IPv4 environment, which statement is correct?

• A. OSPFv3 only supports IPv4
• B. OSPFv3 is not backward compatible with IPv4
• C. OSPFv3 supports both IPv6 and IPv4, but not in the same routing instance
• D. OSPFv3 supports IPv4 only on interfaces with family inet6 defined

By default, which statement is correct about OSPF summary LSAs?

• A. The metric associated with a summary route will be equal to the lowest metric associated with an individual contributing route
• B. The area-range command must be installed on all routers
• C. Type 3 LSAs are advertised for routes in Type 1 LSAs
• D. All Type 2 and Type 7 LSAs will be summarized into a single Type 5 LSA

Your organization manages a Layer 3 VPN for multiple customers. To support advanced route filtering on your PE routers, you must advertise more than one BGP community on advertised VPN routes to remote PE routers. Which routing-instance configuration parameter would support this requirement?

• A. vrf-target import
• B. vrf-export
• C. vrf-target export
• D. vrf-import