350-501 practice questions 141–150

1. Question 141 · 377 in bank

   The network team is planning to implement IPv6 on the company's existing IPv4 network infrastructure. The network currently uses IS-IS to share routes between peers. Which task must the team perform so that IS-IS will run in multitopology mode on the updated IPv6 network?

   • AConfigure the links between the network routers as point-to-point.
   • BConfigure the network routers to use metric-style wide.
   • CConfigure the network routers as Level 2 routers.
   • DConfigure the IS-IS IPv6 metric on the dual-stack links.

   Show answer

   Answer: B

   Explanation

   When multitopology support for IPv6 is used, use the metric-style widecommand to configure IS-IS to use new-style TLVs because TLVs used to advertise IPv6 information in link-state packets (LSPs) are defined to use only extended metrics.

   Source: Adapted from community discussion — rvolfoni

   References

   • Cisco documentation

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2. Question 142 · 377 in bank

   After a series of unexpected device failures on the network, a Cisco engineer is deploying NSF on the network devices so that packets continue to be forwarded during switchovers. The network devices reside in the same building, but they are physically separated into two different data centers. Which task must the engineer perform as part of the deployment?

   • AImplement an L2VPN with the failover peer to share state information between the active and standby devices.
   • BImplement OSPF to maintain the link-state database during failover.
   • CImplement VRFs and specify the forwarding instances that must remain active during failover.
   • DImplement Cisco Express Forwarding to provide forwarding during failover.

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   Answer: B

   Explanation

   D - Cisco Express Forwarding Study the link below It is not necessary to use OSPF, you can also use EIGRP or BGP so that is not the correct answer but "so that packets continue to be forwarded during failovers" you use Cisco Express Forwarding (CEF). "Cisco Express Forwarding A key element of NSF is packet forwarding. In a Cisco networking device, packet forwarding is provided by Cisco Express Forwarding. Cisco Express Forwarding maintains the Forwarding Information Base (FIB), and uses the FIB information that is current at the time of a switchover to continue forwarding packets during a switchover, to reduce traffic interruption during the switchover." https://www.cisco.com/c/dam/en/us/td/docs/switches/lan/catalyst9400/software/release/16-6/configuration_guide/stck_mgr_ha/b_166_nsf_sso_9400_cg.html

   Source: Adapted from community discussion — thejag

   References

   • Cisco documentation
   • Cisco documentation

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3. Question 143 · 377 in bank

   Which benefit is provided by FRR?

   • AIt provides fast forwarding path failure detection times for all media.
   • BIt provides rapid failure detection between forwarding engines.
   • CIt provides performance data for the service provider network.
   • DIt protects Cisco MPLS TE LSPs from link and node failures.

   Show answer

   Answer: D

   Explanation

   Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_path_protect/configuration/xe-16-11/mp-te-path-protect-xe-16-11-book/mpls-traffic- engineering-fast-reroute-link-and-node-protection.html

   References

   • Cisco documentation

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4. Question 144 · 377 in bank

   An engineer must implement QoS to prioritize traffic that requires better service throughout the network. The engineer started by configuring a class map to identify the high-priority traffic. Which additional tasks must the engineer perform to implement the new QoS policy?

   • AAttach the class map to a policy map that sets the minimum bandwidth allocated to the classified traffic and designates the action to be taken on the traffic.
   • BAttach the class map to a policy map that designates the action to be taken on the classified traffic and then attach the policy map to an interface using a service policy.
   • CAttach the class map to a policy map within a VRF to segregate the high-priority traffic and then attach the policy map to an interface in another VRF.
   • DCreate a route map to manipulate the routes that are entered into the routing table and then attach the route map to an interface using a service policy.

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   Answer: B

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5. Question 145 · 377 in bank

   An engineer working for telecommunication company needs to secure the LAN network using a prefix list. Which best practice should the engineer follow when he implements a prefix list?

   • AAn engineer must identify the prefix list with a number only.
   • BThe final entry in a prefix list must be /32.
   • CAn engineer must include only the prefixes for which he needs to log activity.
   • DAn engineer must use nonsequential sequence numbers in the prefix list so that he can insert additional entries later.

   Show answer

   Answer: D

   Explanation

   C is incorrect , Prefix lists are primarily used for filtering and controlling traffic flow, not for logging activity. While it is possible to configure a prefix list to log activity, it is not a best practice to include only the prefixes for which activity needs to be logged.

   Source: Adapted from community discussion — 12_sdeEQ

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6. Question 146 · 377 in bank

   Select 2

   

   Refer to the exhibit. An engineer configured R6 as the headend LSR of an RSVP-TE LSP to router XR2, with the dynamic path signaled as R6-R2-R5-XR2, and set the OSPF cost of all links to 1. MPLS autotunnel backup is enabled on all routers to protect the LSP. Which two NNHOP backup tunnels should the engineer use to complete the implementation? (Choose two.)

   • AThe R2 backup tunnel path R2-R1-R4-XR1-XR2.
   • BThe R2 backup tunnel path R2-R5 across the alternate link.
   • CThe R6 backup tunnel path R6-R2-R5.
   • DThe R6 backup tunnel path R6-R1-R4-R5.
   • EThe R6 backup tunnel path R6-R1-R2.

   Show answer

   Answer: AD

   Explanation

   NNHOP means node-protection. As we have two transit nodes, we need to take into consideration what happens when they go down. These two are R2 and R5. If R2 goes down, we need to go R6 --> R1 --> R4 --> R5 (This is the fastest) If R5 goes down, we need to go R6 --> R2 --> R1 --> R4 --> XR1 --> XR2 The reason for this is becasue R2 is going to be the one who detects that R5 went down so it will re-reoute the traffic, even though there would be a better path.

   Source: Adapted from community discussion — hicah14861

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7. Question 147 · 377 in bank

   An engineer is implementing NSR with OSPF on a large campus that requires high availability. Which task must an engineer perform to complete the process with minimal disruption to traffic?

   • AIncrease the keepalive interval on the OSPF neighbors so that traffic continues to pass during the switchover.
   • BEnsure that the dual RP has synchronized their state information before performing the switchover operation.
   • CReset OSPF neighbor sessions to maintain state information during router switchover.
   • DConfigure the device to repopulate state information using routing updates received from the BDR.

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   Answer: B

   References

   • Cisco documentation

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8. Question 148 · 377 in bank

   A service provider requires continuous real-time network monitoring to provide reliable SLAs to its customers. To satisfy this requirement, a network administrator is implementing gRPC dial out on an ASR with TLS. Receiver 192.168.10.2 will be assigned one of the subscriptions, and it will manage the ASR. Which configuration must the engineer apply to the router as part of the configuration process?

   • Asnmp-server community public snmp-server enable traps snmp-server host 192.168.10.2 version 2c public.
   • Btelemetry model-driven destination-group DGroup1 address family ipv4 192.168.10.2 1 port 10 encoding self-describing-gpb
   • Csnmp-server community public snmp-server enable traps snmp-server enable traps snmp authentication snmp-server manager snmp-server manager session-timeout 1000
   • Dtelemetry model-driven destination-group ciscotest address family ipv4 192.168.10.2 port 10 encoding self-describing-gpb protocol grpc tis-hostname ciscotest.com

   Show answer

   Answer: D

   Explanation

   D looks correct but the command is not quite right, possibly a typo: Command is protocol grpc tls-hostname <> (NOT tis-hostname...)

   Source: Adapted from community discussion — thejag

   References

   • Cisco documentation

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9. Question 149 · 377 in bank

   An engineer must apply an 802.1ad-compliant configuration to a new switchport with these requirements: ✑ The switchport must tag all traffic when it enters the port. ✑ The switchport is expected to provide the same level of service to traffic from any customer VLAN. Which configuration must the engineer use?

   • Ainterface GigabitEthernet1/0/1 switchport mode trunk switchport trunk encapsulation dot1q encapsulation ISL bridge-domain 12
   • Binterface GigabitEthernet1/0/1 ethernet dot1ad uni c-port service instance 12 encapsulation dot1q rewrite ingress tag push dot1ad 21 symmetric bridge-domain 12
   • Cinterface GigabitEthernet1/0/1 ethernet dot1ad uni s-port service instance 12 encapsulation default rewrite ingress tag push dot1ad 21 symmetric bridge-domain 12
   • Dinterface GigabitEthernet1/0/1 ethernet dot1ad nni service instance 12 encapsulation dot1ad bridge-domain 12

   Show answer

   Answer: C

   Explanation

   C looks correct A. there is no "encapsulation isl" option B. "C-UNI—an be either an access port or an 802.1Q trunk port. The port uses the customer bridge addresses. C. "S-UNI—an access port that provides the same service to all customer VLANs entering the interface, marking all C-VLANs entering the port with the same S-VLAN. In this mode, the customer's port is configured as a trunk port, and traffic entering the S-UNI is tagged. D. there is no "encapsulation dot1ad" option https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/16-12-1/b-ce-xe-16-12-asr900/m_ce_802_1ad_900.html https://content.cisco.com/chapter.sjs?uri=/searchable/chapter/www.cisco.com/content/en/us/td/docs/switches/metro/me3600x_3800x/software/release/15-4_3_S/configuration/guide/3800x3600xscg/sw802_one_ad.html.xml

   Source: Adapted from community discussion — thejag

   References

   • Cisco documentation
   • Cisco documentation
   • cisco.com documentation

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10. Question 150 · 377 in bank

    

    Refer to the exhibit. A network operator working for a private telecommunication company with an employee id: 7138: 13:414 just added new users to the network, which resides in VLANs connected to routers R1 and R4. The engineer now must configure the network so that routers R1 and R4 share routes to the VLANs, but routers R2 and R3 are prevented from including the routes in their routing tables. Which configuration must the engineer apply to R4 to begin implementing the request?

    • Apseudowire -class ciscotest encapsulation mpls interface gigabitethernet 1/0/1 connect neighbor 192.168.1.1 101 pw-class cisco
    • Bpseudowire -class ciscotest encapsulation mpls interface gigabitethernet 1/0/1 xconnect 192.168.1.1 101 pw-class ciscotest
    • Cpseudowire-class ciscotest encapsulation mpls service-policy output ciscotest
    • Dinterface serial 2/0/0 frame-relay encapsulation ip address 192.168.1.4 255.255.255.0 service-policy output ciscotest

    Show answer

    Answer: B

    References

    • Cisco documentation

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350-501 practice, question 141. 377 questions available.