2018 April - JN0-661 Exam Questions PDF Dumps - Dumps4Download.com

1. Juniper Exam JN0-661 Service Provider Routing and Switching Version: Demo [ Total Questions: 10 ] https://www.dumps4download.com/jn0-661-dumps.html

2. Question No : 1 - (Topic 1) 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 for a traffic flow removes the data-link connection identifier. D. The ingress PE router associates a single MPLS label with the corresponding traffic flows. Answer: B,D Explanation: Each PE transmits a single small chunk of information about every CE that the PE is connected to every other PE. That means each PE need only maintain a single chunk of information from each CE in each VPN and keep a single route to every site in every VPN. Question No : 2 - (Topic 1) JN0-661 Dumps Click the Exhibit button. R1 is exporting 2000:FEFE:100::/64 to R2 over the EBGP peering session as shown in the exhibit.

3. What will R1 use for this route's protocol next hop when advertising it to R2? A. 2000:FEFE:89::1 B. 172.16.1.1 C. 10.1.1.1 D. ::FFFF:172.16.1.1 Answer: B Explanation: When a BGP router reports itself as the next hop, whether because of an explicit neighbor next-hop-self configuration or implicitly as a result of participating in an EBGP session, BGP allocates a new in label and adds an entry to the MPLS forwarding table, creating a label-to-next-hop mapping. Note: When a BGP router does not report itself as the next hop, whether because of an explicit neighbor next-hop-unchanged configuration or implicitly as a result of a participating in an IBGP session, BGP does not allocate a new in label. Instead, if the route is advertised as a labeled route, BGP uses the existing out label. This feature is used mainly on route reflectors. References: https://www.juniper.net/techpubs/en_US/junose16.1/topics/concept/mbgp-bgp- JN0-661 Braindumps

4. next-hop-self-overview.html Question No : 3 - (Topic 1) What are two characteristics of L2 circuits? (Choose two.) A. Routing instance configuration is required for L2 circuits to function correctly. B. Routing instance configuration is not required for L2 circuits to function correctly. C. BGP is required for L2 circuits to function correctly. D. BGP is not required for L2 circuits to function correctly. Answer: B,D Explanation: B: You configure Layer 2 VPNs in a routing instance. As a result, Layer 2 VPNs have unique site and VPN identifiers. However, Layer 2 circuits do not require a routing instance configuration and instead use an alternate method of identifying circuits. D: Layer 2 VPNs, like Layer 3 VPNs, require Border Gateway Protocol (BGP) for transport of traffic between PE routers. In contrast, Layer 2 circuits do not require BGP. Instead, Layer 2 circuits rely on LDP and MPLS for their operation. References: http://www.juniper.net/techpubs/en_US/junos12.3/topics/concept/layer-two- circuits-overview-solutions.html Question No : 4 - (Topic 1) JN0-661 Question Answers Click the exhibit button. [edit protocols pim] user@R1# show rp {

5. bootstrap { family inet { priority 250; } } local { address 10.220.1.1; priority 1; group-ranges { 224.1.1.11/32; 224.0.0.0/4; } } } interface all; interface fxp0.0 { disable; } [edit protocols pim] user@R4# show rp { bootstrap { family inet { priority 249; } } JN0-661 Exam Dumps

6. local { address 10.220.1.4; priority 5; group-ranges { 224.1.1.12/32; 224.0.0.0/4; } } } interface all; interface fxp0.0 { disable; } Referring to the exhibit, which router will be the RP? A. R4 for all groups B. R1 for group 224.1.1.11 and R4 for all other groups C. R1 for all groups D. R4 for group 224.1.1.12 and R1 for all other groups Answer: A Explanation: A priority of 1 means the routing device has the least chance of becoming a designated router. Here R1 has priority 1, while R4 has priority 5. R4 will be elected the designated router and the rendezvous point (RP) for both address ranges. Note: In a shared tree, the root of the distribution tree is a router, not a host, and is located somewhere in the core of the network. In the primary sparse mode multicast routing protocol, Protocol Independent Multicast sparse mode (PIM SM), the core router at the root of the shared tree is the rendezvous point (RP). References: http://www.juniper.net/documentation/en_US/junos15.1/topics/example/ospf- designated-router-election-configuring.html

7. Topic 2, Practice Set Question No : 5 - (Topic 2) You are asked to provision a BGP-signaled Layer 2 VPN for a new customer. What information is required for the VPN routing instance that is connected to the CE device? (Choose three.) A. the logical interfaces provisioned to the local CE device B. the logical interfaces provisioned to the remote PE device C. the Layer 2 encapsulation type D. the local site ID E. the circuit identifier Answer: A,C,D Question No : 6 - (Topic 2) Refer to the exhibit.

8. What are two ways to resolve the error BGP label allocation failure: Need a next hop address on LAN? (Choose two.) A. Configure a /32 static route with the next hop as itself to any remote address on the network assigned to the CE-facing interface. B. Resolve the MPLS issue between the PE routers. C. Configure a static ARP entry on fe-l/#3.0. D. Configure vrf-table-label in the routing-instance. Answer: A,D Question No : 7 - (Topic 2) -- Exhibit –

9. Juniper JN0-661 : Braindumps Questions -- Exhibit -- Click the Exhibit button. The exhibit displays an IS-IS topology and an IS-IS configuration for R3 and R4. R4 cannot reach any external destinations or addresses located in Area 49.1111. How would you ensure that R4 can reach external destinations and addresses located in area 49.1111? A. Configure an export policy on R3 that leaks all IS-IS routes from Level 2 to Level 1. B. Configure R3's authentication key to match R4's authentication key. C. Remove the overload statement on R4. D. Remove the ignore-attached-bit statement on R4. Answer: D Question No : 8 - (Topic 2)

10. -- Exhibit – -- Exhibit -- Click the Exhibit button. Referring to the exhibit, you see the proper BGP, MPLS, and routing instance configuration for PE1 and PE2. Which configuration on PE1 will allow CE1 to communicate with CE2 over a Layer 2 VPN, assuming PE2 has PPP TCC encapsulation on so-0/0/0.0? A. [edit interfaces fe-0/2/2 unit 42] family tcc { proxy { inet-address 192.168.1.2; } remote { inet-address 192.168.1.1; } } B. [edit interfaces fe-0/2/2 unit 42] family tcc { remote { inet-address 192.168.1.2; } } C. [edit interfaces fe-0/2/2 unit 42] family tcc { proxy { inet-address 192.168.1.1; } } D. [edit interfaces fe-0/2/2 unit 42]

11. family tcc { proxy { inet-address 192.168.1.1; } remote { inet-address 192.168.1.2; } } Answer: A Question No : 9 - (Topic 2) You are configuring a Layer 2 circuit. Which two configuration steps are required? (Choose two.) A. Configure LDP on the interfaces between PE and CE routers. B. Configure circuit or translational cross-connects between PE routers and between PE and P routers. C. Configure circuit or translational cross-connects between PE and CE routers. D. Configure LDP on the interfaces between PE routers and between PE and P routers. Answer: C,D Question No : 10 - (Topic 2) You have recently deployed an MPLS network using CSPF with its default settings. Which statement is true regarding path selection when multiple candidate paths exist? A. The path selected will be based on the most-fill bandwidth ratio. B. The path selected will be based on the least-fill bandwidth ratio. C. The path selected will be based on a randomized algorithm. D. The path selected will be based on the first-hop LSR's RID. Answer: C https://www.dumps4download.com/jn0-661-dumps.html