Juniper Juniper Certifications JN0-361 Questions & Answers

• Question 171:

  Where does the Junos OS place an MPLS header in a data packet?

  A. before the Layer 2 header

  B. encoded within the Layer 2 header

  C. before the Layer 3 header

  D. after the Layer 3 header

  Correct Answer: C

• Question 172:

  You are designing a new MPLS network that contains 1000 nodes. To provide for any-to-any connectivity for your customer base, you have decided to build a full mesh of RSVP LSPs. You are concerned with scalability of the overall network and with the resources used by the devices. Which RSVP feature is used to accomplish your design goals.

  A. authentication

  B. fast reroute

  C. hello interval

  D. refresh reduction

  Correct Answer: D

  The RSVP refresh reduction, based on RFC 2961, addresses the problem of scalability and reliability that result from relying on periodic refresh messages.

• Question 173:

  Your RSVP network is being designed to support end-to-end class of service (CoS) using best practices. Which MPLS label should be advertised by the egress router in this situation?

  A. 0

  B. 1

  C. 2

  D. 3

  Correct Answer: A

  MPLS label 0, or explicit null, should be used so that the label is popped at the egress router.

• Question 174:

  Which statement is true about the operation of a Layer 3 VPN as defined in RFC 4364?

  A. BGP is used for forwarding and MPLS is used for routing

  B. LDP is used for routing and RSVP is used for forwarding

  C. BGP is used for routing and MPLS is used for forwarding

  D. LDP is used for forwarding and MPLS is used for routing

  Correct Answer: C

• Question 175:

  You are asked to establish an MPLS LSP between two sites. You are required to ensure the LSP traverses specific routers within your network. Which solution is correct?

  A. Enable traffic engineering within LDP and define the explicit route the LSP must follow.

  B. Implement RSVP and define the explicit route the LSP must follow.

  C. Enable traffic engineering within RSVP and define the explicit route the LSP must follow.

  D. Implement LDP and define the explicit route the LSP must follow.

  Correct Answer: B

  On the ingress router, create an explicit-path LSP, and specify the transit routers between the ingress and egress routers. In this configuration, no constrained-path computation is performed. For the primary path, all intermediate hops are strictly specified so that its route cannot change. The secondary path must travel through router 14.1.1.1 first, then take whatever route is available to reach the destination. The remaining route taken by the secondary path is typically the shortest path computed by the IGP.

  http://www.juniper.net/documentation/en_US/junos15.1/topics/example/mpls-lsp-explicit-pathconfiguring.html

• Question 176:

  What is the default interval for a VRRP advertisement?

  A. 1 second

  B. 2 seconds

  C. 10 seconds

  D. 30 seconds

  Correct Answer: A

  By default, the master router sends VRRP advertisement packets every second to all members of the VRRP group. These packets indicate that the master router is still operational. If the master router fails or becomes unreachable, the backup router with the highest priority value becomes the new master router. Reference: https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/vrrp-masterrouter-advertisement-interval-configuring.html

• Question 177:

  You have been asked to provision a service provider's network to accommodate Layer 3 VPNs as defined in RPC 4364. Which three tasks must be performed before the provider core is ready to carry VPN traffic? (Choose three.)

  A. All P routers and PE routers must be configured to support MPLS administrative-groups (colors)

  B. All PE routers must be configured to support Multiprotocol BGP (MP-BGP)

  C. All P routers and PE routers must have a signaling protocol such as RSVP or LDP enabled

  D. All P routers and PE routers must have a discovery protocol such as LLDP or CDP enabled

  E. All P routers and PE routers must have MPLS reach ability to PE routers

  Correct Answer: BCE

• Question 178:

  You want to ensure that your RSVP LSPs are following a particular path across the network. Which RSVP object ensures that your desire will be met?

  A. explicit route object

  B. record route object

  C. session object

  D. traffic specification object

  Correct Answer: A

• Question 179:

  Which operational mode command would you use to verify the presence of VPN routes on a PE device?

  A. show route table bgp.l3vpn.0

  B. show route protocol bgp terse | count

  C. show route table inet.0

  D. show route route-type vpn

  Correct Answer: A

• Question 180:

  You have been asked to deploy a Layer 2 VPN for a new customer. What information will be present in the PE's associated VPN forwarding table? (Choose three.)

  A. The customer site ID

  B. The route distinguisher

  C. The interface encapsulation

  D. The label base

  E. The community name

  Correct Answer: ABD