Cisco 350-501 Online Practice Questions and Exam Preparation

Cisco 350-501 Online Questions & Answers

• Question 241:

  Which role does the Adjacency-SID sub-TLV extension perform in the IS-IS routing protocol?

  A. It is advertised within TLV-136 (Extended IP Reachability) to label a specific node in the network.
  B. It is advertised within TLV-145 (IS-IS Prefix Reachability Information) to label host prefixes on loopback interfaces on Level 2 routers within one IS-IS area
  C. It is advertised within TLV-24 (IS-IS Neighbor Adjacency Attribute) to label a specific adjacency between Level 1 routers within one IS-IS area
  D. It is advertised within TLV-22 (Extended IS Reachability) to label a specific link in a segment routing domain
  D. It is advertised within TLV-22 (Extended IS Reachability) to label a specific link in a segment routing domain

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  Explanation

  A new IS-IS sub-TLV is defined: the Adjacency Segment Identifier (Adj-SID) sub-TLV.

  The Adj-SID sub-TLV is an optional sub-TLV carrying the Segment Routing IGP-Adjacency-SID as defined in [RFC8402] with flags and fields that may be used, in future extensions of Segment Routing, for carrying other types of SIDs.

  IS-IS adjacencies are advertised using one of the IS Neighbor TLVs below:

  TLV-22 (Extended IS reachability) [RFC5305] TLV-222 (MT-ISN) [RFC5120] TLV-23 (IS Neighbor Attribute) [RFC5311] TLV-223 (MT IS Neighbor Attribute) [RFC5311] TLV-141 (inter-AS reachability information) [RFC5316] Multiple Adj-SID sub-TLVs MAY be associated with a single IS Neighbor.

• Question 242:

  Which statement about Network Services Orchestrator (NSO) is true?

  A. It must use SDN as an overlay for addressing.
  B. It uses YANG modeling language to automate devices.
  C. It is used only in service provider environments.
  D. It can be used only with XML coding.
  B. It uses YANG modeling language to automate devices.

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  Explanation

  Network Services Orchestrator (NSO) uses the YANG (Yet Another Next Generation) modeling language to provide a standardized way to automate network devices. YANG provides a powerful schema to model configuration and state data for network elements, which NSO leverages for service automation and orchestration.

• Question 243:

  Refer to the exhibit.

  

  The PE devices are Cisco ASR 9000 Series that provide L2VPN services according to the EVC model. The customer intends to run several C-tags on both ends of the connection.

  What happens to the existing VLANs on the Layer 2 transport on PEs that face the CEs?

  A. Existing VLANs are removed by default.
  B. Existing VLANs need to be removed by using the rewrite command.
  C. Existing VLANs are preserved by default.
  D. Existing VLANs need to be reconfigured by using the encapsulation command.
  C. Existing VLANs are preserved by default.

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  Explanation

• Question 244:

  What is the purpose of RSVP tear messages?

  A. to inform the headend router of LSP issues
  B. to confirm successful end-to-end resource allocation
  C. to reuse router resources for other reservation requests
  D. to notify the tail-end router of resource unavailability on the transit router
  C. to reuse router resources for other reservation requests

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  Explanation

  RSVP tear messages are used to clear the PATH or RESERVATION states on a router instantaneously, which enables the reuse of resources on the router for other requests. This is essential in MPLS Traffic Engineering where efficient resource management is crucial for maintaining network performance and stability.

• Question 245:

  Refer to the exhibit.

  

  An engineer ran this show telemetry command to view subscription SUB11 on RouterX.

  The engineer then decided that RouterY should provide the same output for sensor group SGroup13 as RouterX.

  The engineer cannot access RouterX to copy its configuration No access lists on the router block user access.

  Which configuration must the engineer apply on RouterY to provide the same output from the show telemetry command?

  A. RouterY(config)# telemetry model-drivenRouterY(config-model-driven)# subscription SGroup13RouterY(config-model-driven-subs)# sensor-group-id SGroup13 sample-interval 20000
  B. RouterY(config)# telemetry model-drivenRouterY(config-model-driven)# sensor-group SGroup13RouterY(config-model-driven-snsr-grp)# sensor-path openconfig-interfaces:interfaces/interface
  C. RouterY(config)# telemetry model-drivenRouterY(config-model-driven)# destination-group SUB11RouterY(config-model-driven-dest)# address family ipv4 172.16.10.1 port 22471RouterY(config-model-driven-dest-addr)# encoding self-describing-gpbRouterY(config-model-driven-dest-addr)# protocol tcp
  D. RouterY(config)# telemetry model-drivenRouterY(config-model-driven)# subscription SUB11RouterY(config-model-driven-subs)# sensor-group-id SGroup13 sample-interval 20000RouterY(config-model-driven-subs)# destination-id DGroup1
  B. RouterY(config)# telemetry model-drivenRouterY(config-model-driven)# sensor-group SGroup13RouterY(config-model-driven-snsr-grp)# sensor-path openconfig-interfaces:interfaces/interface

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  Explanation

• Question 246:

  DRAG DROP

  A network engineer is adding 10Gbps link to an existing 2X1Gbps LACP-based LAG to augment its capacity. Network standards require a bundle interface to be take out of service if one of its member links does down, and the new link must be added with minimal impact to the production network. Drag and drop the tasks that the engineer must perform from the left into the sequence on the right. Not all options are used.

  Select and Place:

  

  

  Explanation

  Explanation/Reference:

• Question 247:

  Refer to the exhibit.

  

  All routers are running IS-IS. Which routers must be Level 2 routers?

  A. B, D, E and G
  B. A, D, E, and H
  C. B, C, F, and G
  D. B, C, E, F, and G
  E. A, B, C, D, F, G, and H
  D. B, C, E, F, and G

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  Explanation

• Question 248:

  Refer to the exhibit.

  R1# configure terminal R1(config)# router isis area2 R1(config-router)# metric-style wide level-1

  An engineer is configuring multitiopology IS-IS for IPv6 on router R1. Which additional configuration must be applied to complete the task?

  A. R1# configure terminalR1(config)# router isis area2R1(config-router)# address-family ipv6R1(config-router-af)# multi-topology
  B. R1# configure terminalR1(config)# router isis area1R1(config-router)# metric-style wide level-2R1(config-router)# address-family ipv6R1(config-router-af)# multi-topology
  C. R1# configure terminalR1(config)# router isis area2R1(config-router)# metric-style wideR1(config-router)# address-family ipv6R1(config-router-af)# multi topology
  D. R1# configure terminalR1(config)# router isis area1R1(config-router)# metric-style wide level-1R1(config-router)# address-family ipv6R1(config-router-af)# multi topology
  A. R1# configure terminalR1(config)# router isis area2R1(config-router)# address-family ipv6R1(config-router-af)# multi-topology

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  Explanation

  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/15-mt/irs-15-mt-book/ip6-route-multi-isis.html

• Question 249:

  What is the role of NSO in network automation?

  A. It is a tool used to bridge automation to the physical network infrastructure.
  B. It is a GUI used to manage wireless devices in a campus infrastructure.
  C. It is a type of REST API used to configure an APIC.
  D. It is a tool that uses CLI only to configure virtual network devices.
  A. It is a tool used to bridge automation to the physical network infrastructure.

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  Explanation

  Cisco Network Services Orchestrator (NSO) acts as a bridge between application or service owners and infrastructure owners, allowing each team to operate in their native environment while still collaborating effectively together. It simplifies service delivery and management by bridging the gap between applications and network devices https://www.cisco.com/c/en/us/products/collateral/cloud-systems-management/network-services-orchestrator/datasheet-c78-734576.html

• Question 250:

  In an EVPN operation how does the PE determine and advertise Ethernet segment reachability?

  A. The PE discovers and shares routing information for the B-MAC addresses associated with local Ethernet segments.
  B. The PE discovers remote ESIs and determines their redundancy mode.
  C. The PE discovers the remote PEs in the EVI and builds a flood list linked with the EVI.
  D. The PE discovers other PEs in the same Ethernet segment and elects a DF.
  B. The PE discovers remote ESIs and determines their redundancy mode.

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  Explanation