350-501 practice questions 361–370

1. Question 361 · 377 in bank

   What happens when a segment-routing TE tunnel loses the link and there is no secondary path in place?

   • AThe headend router generates a new path to the tail-end router using bandwidth to determine the best path.
   • BThe headend router starts the invalidation timer to bring the tunnel down.
   • CThe tail-end router sends an alert to the syslog server that the tunnel and the secondary route are inaccessible.
   • DThe headend and tail-end routers revalidate SID hops to determine the proper label stack to reroute the traffic.

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   Answer: B

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2. Question 362 · 377 in bank

   Select 2

   

   Refer to the exhibit. OSPF is running in the network, which is segmented into three areas. MPLS is enabled on all routers to support Layer 3 VPN. The network architect Is concerned about potential packet loss when new OSPF adjacencies form. Which two tasks should the architect perform to implement MPLS LDP synchronization? (Choose two.)

   • AEstablish MPLS targeted sessions for connected LDP neighbors only.
   • BEnable LDP sync under the OSPF process.
   • CConfigure OSPF to use the same router ID for each router that is involved in MPLS.
   • DEnable MPLS functionality on all interfaces that are involved in MPLS.
   • EEstablish a virtual link between the areas to support LDP sync between segments.

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   Answer: BD

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3. Question 363 · 377 in bank

   

   Refer to the exhibit. Routers CE1 and CE2 support users in different locations, but the users require Layer 2 to operate within the company intranet. A pseudowire is configured between CE1 and CE2 to support these Layer 2 services. The connection is occasionally unstable, so an engineer has been asked to monitor it periodically. How should the engineer verify connectivity between sites over the Layer 2 connection?

   • AEnable SNMP to send traps that verify traffic movement between sites.
   • BImplement a graceful restart to verify that routes are shared between sites.
   • CConfigure NetFlow to monitor the control plane and confirm that traffic is passing.
   • DUse MPLS OAM to perform an LSP traceroute over the connection.

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   Answer: D

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4. Question 364 · 377 in bank

   

   Refer to the exhibit. PE1 and PE2 provide backbone carrier support to CSC-CE1 and CSC-CE2. CSC-CE1 and CSC-CE2 provide internet access and interoffice communication for CE1 and CE2, which are located at two different offices of an international corporation. CSC-CE1 and CSC-CE2 were recently moved to different autonomous systems from PE1 and PE2, and they must provide Layer 3 services to CE1 and CE2. Which task must the engineering team perform to allow CE1 and CE2 to continue to communicate through the two service providers?

   • AImplement multicast routing using the BGP MDT address family.
   • BImplement a pseudowire to allow only broadcast traffic to pass between CE1 and CE2.
   • CImplement OSPF end to end and use virtual links to make connections across areas.
   • DImplement Unified MPLS between the CSC and PE routers.

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   Answer: D

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5. Question 365 · 377 in bank

   What is the primary capability of Inter-AS VPN?

   • Aproviding end-to-end encryption for traffic passing through multiple AS networks
   • Bproviding load balancing across multiple AS networks in the same VPN service
   • Cproviding multicast support between different service-provider networks
   • Dproviding end-to-end VPN services across multiple service-provider networks

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   Answer: D

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6. Question 366 · 377 in bank

   

   Refer to the exhibit. ISP_A is about to launch a new internet service. ISP_A is already providing MPLS VPN Layer 3 services to Customer_A and Customer_B, which are connected to ISP_A via OSPF. A network engineer completed the BGP and VRF configurations on R2 to support the new internet service. Which additional action completes the launch?

   • AImport route-target 62:101 into the customer VRFs on R1 and R3
   • BImplement the BGP routing protocol in the customer VRFs on R1 and R2
   • CEnable the route-replicate command under the customer VRFs on R1 and R2
   • DActivate NAT CE in the customer VRFs on R1, R2, and R3

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   Answer: A

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7. Question 367 · 377 in bank

   How do PE routers operate with the MDT in a multicast VPN?

   • AWhen the source PE router establishes adjacency using PIM SM mode in the default MDT, the receiving PE requests information about the source PE for BGP advertisement.
   • BThe default MDT uses PIM sparse mode and PIM establishes adjacency over the shortest path tree toward the destination PE router.
   • CWhen the sending PE router recognizes that multicast data has exceeded the bandwidth threshold, it creates a data MDT and sends a UDP message to all routers using the default MDT.
   • DAfter the default MDT and BGP VPNv4 neighbor is configured, a different PE neighbor in the IPv6 MDT address family Is configured automatically for migrating to MDT SAFI.

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   Answer: C

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8. Question 368 · 377 in bank

   A network engineer must implement an ACL-based solution to mitigate availability issues on a web service that is hosted on a server at IP address 172.16.15.18/23. Access to the web server should be allowed over HTTP from RFC 1918 addresses only. The network architect has already enabled PMTUD in the network. Which ACL configuration must the engineer implement to complete the task?

   • Aaccess-list 199 deny ip any host 172.16.15.18 tcp-fragments access-list 199 permit tcp 10.0.0.0 255.255.255.255 172.16.15.18 0.254.0.255 eq 80 access-list 199 permit tcp 172.16.0.0 0.0.255.255 172.16.15.18 0.0.254.255 eq 80 access-list 199 permit tcp 192.168.0.0 0.0.0.255 172.16.15.18 0.0.254.255 eq 80 access-list 199 deny ip any any
   • Baccess-list 199 deny tcp any host 172.16.15.18 http-fragments access-list 199 permit 16 10.10.0.0 0.255.255.255 172.16.15.18 0.0.2.253 eq 80 access-list 199 permit 16 172.16.0.0 0.0.255.255 172.16.15.18 0.0.2.253 eq 80 access-list 199 permit 16 192.168.0.0 0.0.0.255 172.16.15.18 0.0.2.253 eq 80 access-list 199 deny tcp any any
   • Caccess-list 198 deny ip any host 172.16.15.18 ip-fragments access-list 198 permit 18 10.10.0.0 255.255.255.0 172.16.15.18 255.255.254.0 access-list 198 permit 18 172.16.0.0 255.255.0.0 172.16.15.18 255.255.254.0 access-list 198 permit 18 192.168.0.0 255.255.255.0 172.16.15.18 255.255.254.0 access-list 198 deny tcp any any
   • Daccess-list 198 deny ip any host 172.16.15.18 fragments access-list 198 permit 6 10.0.0.0 0.255.255.255 172.16.15.18 0.0.1.255 eq 80 access-list 198 permit 6 172.16.0.0 0.0.255.255 172.16.15.18 0.0.1.255 eq 80 access-list 198 permit 6 192.168.0.0 0.0.0.255 172.16.15.18 0.0.1.255 eq 80 access-list 198 deny ip any any

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   Answer: D

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9. Question 369 · 377 in bank

   Select 2

   A network architect at tSP_A must implement a loop-avoidance mechanism in the organization's ring network topology. The architect decided to implement ITU-T G.8032. Intermittent link flaps within two seconds should be ignored. Which two configurations must the architect apply? (Choose two.)

   • Alink-protection group management vlan 1
   • Bring-protection g8032 profile vlan port-channel none
   • Cethernet ring g8032 profile ethernet
   • Dcontinuity-check direction down 2
   • Etimer hold-off 2

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   Answer: BE

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10. Question 370 · 377 in bank

    

    Refer to the exhibit. Router R1 in the network has a GigabitEthernet interface supporting 1 Gbps of bandwidth, and R2 has a FastEthemet interface. Both devices are connected to a WAN network as shown. To ensure seamless data flow, both routers have BGP routing enabled with the WAN ISP. To better handle a recent increase in VoIP traffic, a network engineer must identify VoIP traffic and mark it with DSCP value EF to guarantee bandwidth of 500 Kbps. Which action must the engineer take to meet the requirements?

    • AImplement Priority Queuing on R1 to reduce traffic latency for VoIP traffic.
    • BImplement Weighted Fair Queuing on R2 to minimizing queuing delays for VoIP traffic.
    • CImplement Class-Based Shaping in the network to ensure VoIP traffic quality.
    • DImplement Traffic Policing In the network to guarantee sufficient VoIP traffic throughput.

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    Answer: D

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350-501 practice, question 361. 377 questions available.