JN0-661 Exam Training Practice Tests (Juniper Service Provider Routing and Switching)]

Question 1

-- Exhibit -

-- Exhibit --
Click the Exhibit button.
The Client 1 router forwards a route learned from its EBGP peer to the route reflector RR1.
The route reflector forwards the route to the Client 2 router. However, the Client 2 router uses suboptimal routing to reach the EBGP route destination.
What would cause this behavior?

A. The route reflector has a next-hop self policy for EBGP-learned routes. B. The route reflector becomes the default forwarding path for packets sent from Client 2 towards the EBGP route destination. C. The route reflector is applying the originator ID attribute to the route. D. The route reflector is using the no-client-reflect parameter.

Correct Answer: A

Question 2

You are working with a new MPLS network that is using the default EXP classifier and default schedules. A small amount of traffic is being placed in the assured forwarding class.
No other traffic is passing through the network at this time.
In this scenario, what happens to the traffic that is being placed in the assured forwarding class?

A. The traffic is reclassified to the best effort forwarding class and is forwarded. B. The traffic is reclassified to the network control forwarding class and is forwarded. C. The traffic remains in the assured forwarding class and is dropped. D. The traffic remains in the assured forwarding class and is forwarded.

Correct Answer: D

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Question 3

Your customer requires a Layer 2 VPN service (draft-kompella-mpls-l2vpn). You are asked to describe the operational requirements on the PE router supporting this service.
Which two statements are true in this scenario? (Choose two.)

A. The ingress PE router associates multiple MPLS labels with the corresponding traffic flows. B. The ingress PE router for a traffic flow maintains the data-link connection identifier. C. The ingress PE router associates a single MPLS label with the corresponding traffic flows. D. The ingress PE router for a traffic flow removes the data-link connection identifier.

Correct Answer: B,C

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Question 4

You are asked to deploy VPLS in your network as a new service for several customers, and you must identify the configuration and provisioning requirements for your customers.
In this scenario, which two statements are correct? (Choose two.)

A. CE interfaces facing the service provider must be Layer 3 interfaces. B. CE interfaces facing the service provider must be Ethernet interfaces. C. VLAN IDs defined on CE interfaces must be the same on both ends unless otherwise negotiated. D. PE interfaces facing the core must have VPLS encapsulation enabled.

Correct Answer: B,C

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Question 5

An L2VPN (draft-kompella-mpls-l2vpn) is established between two PE routers to provide connectivity between two customer sites.
Which two statements related to this deployment are true? (Choose two.)

A. LDP must be used for the control plane communications. B. Martini encapsulation is used in the data plane communications. C. Kompella encapsulation is used in the data plane communications. D. BGP must be used for the control plane communications.

Correct Answer: C,D

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Question 6

Click the Exhibit button.

Referring to the exhibit button, you are asked to ensure that traffic destined for the
5.5.5.0/24 network must use the LSP named Top.
Which two actions would you perform to accomplish this task? (Choose two.)

A. Create a routing policy that matches the route 5.5.5.0/24 with an action of install- nexthop 1sp Top. B. Apply the policy as an import policy for BGP on R1. C. Create a routing policy that matches the route 5.5.5.0/24 with an action of next-hop Top. D. Apply the policy to the forwarding table on R1.

Correct Answer: A,D

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Question 7

Which statements are true about NG MVPNs? (Choose two.)

A. NG MVPN membership is signaled between PEs using MP-BGP. B. Every NG MVPN PE router builds a selective provider multicast service interface tunnel to every other router in the same NG MVPN C. Customer multicast traffic can be transported over the provider network using point-to- multipoint MPLS LSPs. D. NG MVPN membership is signaled between PEs using PIM?

Correct Answer: B,C

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Question 8

Which two statements regarding OSPFv2 or OSPFv3 authentication are correct? (Choose two.)

A. OSPFv2 supports MD5 authentication. B. OSPFv2 supports MD5 or SHA authentication. C. OSPFv3 relies on the native security stack that uses IPsec. D. OSPFv2 relies on the native security stack that uses IPsec.

Correct Answer: C

Question 9

You have established an MSDP peering between multicast domains for your AS and a neighboring AS. You are concerned about unnecessary flooding or looping of source active messages between MSDP peers. Which MSDP mechanism is used to prevent this problem?

A. The receiving MSDP peer sends register-stop messages towards the originating RP that forwarded the SA messages. B. The receiving MSDP peer performs a multicast RPF check to ensure that the SA messages are forwarded away from only the originating multicast source. C. The receiving MSDP peer sends prune messages to all upstream neighbors to avoid receiving additional SA messages. D. The receiving MSDP peer performs amulticast peer-RPF check to ensure that the SA messages are forwarded away from only the originating RP.

Correct Answer: D

Juniper Service Provider Routing and Switching - JN0-661 Exam Practice Test