Cisco 350-501 Online Practice Questions and Exam Preparation

Cisco 350-501 Online Questions & Answers

• Question 451:

  Refer to the exhibit.

  mpls label range 16 100000 static 100002 1048570 mapls label protocol 1dp

  mpls 1dp gracetal-restart

  interface Loopback0 !

  ip address 10.20.20.20 255.255.255.255 no ip directed-broadcast no ip mroute-cache !

  interface Gi1/1/0 ip address 10.12.0.2 255.255.0.0 no ip direted-broadcast mpls label protocol ldp mpls ip !

  router ospf 100 log-adjacency-changes nsf cisco enforce global redistribute connected subnets network 10.20.20.20 0.0.0.0 area 0 network 10.12.0.0 0.0.255.255 area 0 !

  mpls ldp router-id Loopback0 force

  A network administrator implemented MPLS LDP changes on PE-A LSR device. The engineer must ensure there are no LDP peer are fully operational.

  Which LDP feature must the engineer apply to the existing configuration to eliminate the problem?

  A. Configure MPLS LDP IGP synchronization on the network.
  B. Configure MPLS LDP NSR for all LDP sessions.
  C. Enable LDP session protection under the routing protocol.
  D. Disable IP CEF on routers running LDP and enable LDP.
  B. Configure MPLS LDP NSR for all LDP sessions.

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  Explanation

  MPLS LDP (Label Distribution Protocol) is used for label distribution in MPLS networks. When making changes to the LDP configuration, it's essential to ensure that the changes do not disrupt existing LDP sessions. In this scenario, the network administrator implemented MPLS LDP changes on the PE-A LSR (Label Switching Router) device, and the goal is to prevent any disruption to LDP peers.

  The MPLS LDP Non-Stop Routing (NSR) feature allows LDP sessions to survive control-plane switchover events without interruption. When NSR is enabled, the LDP session state information is synchronized between the active and standby control planes. If the active control plane fails, the standby control plane takes over seamlessly, and LDP sessions continue without interruption.

  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/msp/configuration/xe-3s/mp-ha-xe-3s-book/mp-nsr-ldp- supp.pdf

• Question 452:

  Refer to the exhibit.

  

  A network operator has two IPv4 and IPv6 dual-stacked network on each side of the IPv4 core network. The operator must be able to provide connectivity between them while using specific assigned IPv6 space provided from the company IP administrator team. Which technology should the network operator use to accomplish this goal?

  A. 6rd
  B. DS-Lite
  C. NAT44
  D. NAT46
  A. 6rd

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  Explanation

• Question 453:

  Which statement describes the advantage of a Multi-Layer control plane?

  A. It provides multivendor configuration capabilities for Layer 3 to Layer 1.
  B. It automatically provisions, monitors, and manages traffic across Layer 0 to Layer 3.
  C. It supports dynamic wavelength restoration in Layer 0.
  D. It minimizes human error configuring converged networks.
  C. It supports dynamic wavelength restoration in Layer 0.

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  Explanation

• Question 454:

  Refer to the exhibit.

  

  A network engineer received a complaint about these problems in OSPF stub area 100:

  1. The Ethernet link is down between routers RX and RY because the fiber was cut.

  2. CE site A traffic to the hub site is being dropped.

  Which action resolves these issues?

  A. Change the OSPF area 100 type to stub on RZ.
  B. Set the OSPF MTU to 1500 on the link between RX and RZ.
  C. Set the OSPF authentication type to MD5 between RX and RY.
  D. Change the OSPF priority to 100 on the Interfaces that connect RX and RY.
  A. Change the OSPF area 100 type to stub on RZ.

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  Explanation

  The issue is occurring in OSPF stub area 100 where the Ethernet link is down between routers RX and RY due to a cut fiber, leading to dropped traffic from CE site A to the hub site. Changing the OSPF area 100 type to stub on RZ can resolve these issues. In a stub area, OSPF routers use a default route to forward traffic to destinations outside the area, reducing the size of their routing tables. This would allow traffic from CE site A to be routed through RZ when the direct link between RX and RY is down.

  Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) - Cisco SPCOR Training

• Question 455:

  Refer to the exhibit.

  

  While troubleshooting a connectivity issue on router R2, a network engineer with an employee id:3876.13.497 notices that although it detects three OSPF links from R1, the OSPF prefixes are missing from the routing table.

  What is the reason for the problem?

  A. The serial interfaces have different MTUs
  B. Both loopback interfaces on R1 are configured as stub
  C. The R2 Serial 1/0 interface is configured with an IP address, but the R1 Serial R1 Serial 1/0 interface in unnumbered.
  D. The subnet masks on the serial interfaces are mismatched.
  C. The R2 Serial 1/0 interface is configured with an IP address, but the R1 Serial R1 Serial 1/0 interface in unnumbered.

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  Explanation

• Question 456:

  Which MPLS design attribute can you use to provide Internet access to a major customer through a separate dedicated VPN?

  A. The Internet gateway router is connected as a PE router to the MPLS backbone.
  B. The CE router supports VRF-Lite and the full BGP routing table.
  C. The Internet gateway inserts the full Internet BGP routing table into the Internet access VPN.
  D. The customer that needs the Internet access service is assigned to the same RTs as the Internet gateway.
  D. The customer that needs the Internet access service is assigned to the same RTs as the Internet gateway.

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  Explanation

• Question 457:

  The engineering team at a large ISP has been alerted that a customer network is experiencing high traffic congestion. After a discussion between the ISP and technical personnel at the customer site, the team agrees that traffic to the customer network that exceeds a specific threshold will be dropped. Which task must the engineer perform on the network to implement traffic policing changes?

  A. Configure RSVP to reserve bandwidth on all interfaces when a path is congested.
  B. Enable Cisco Discovery Protocol on the interface sending the packets.
  C. Enable Cisco Express Forwarding on the interfaces sending and receiving the packets.
  D. Set IP precedence values to take effect when traffic exceeds a given threshold.
  D. Set IP precedence values to take effect when traffic exceeds a given threshold.

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  Explanation

  By setting IP precedence values (using Differentiated Services Code Point - DSCP) and configuring traffic policing, the network can enforce policies to drop or mark packets based on their priority. When traffic exceeds the specified threshold, the network can take appropriate actions.

• Question 458:

  Refer to the exhibit.

  

  An engineer at ISP C is configuring a new interconnection with ISPs A and B using the BGP protocol. After the initial configuration, the engineer noticed high memory usage and an abnormally large LIB table on router R2.

  Which two actions must the engineer take on R2 to minimize memory usage? (Choose two.)

  A. Configure the mpls ldp neighbor 11.11.11.11 labels accept 1 command.
  B. Configure Standard ACL 1 with accepted prefixes.
  C. Configure Extended ACL 101 with accepted prefixes.
  D. Configure the mpls ldp neighbor 1.1.1.1 labels accept 101 command.
  E. Configure the mpls ldp neighbor 21.21.21.21 labels accept 101 command.
  A. Configure the mpls ldp neighbor 11.11.11.11 labels accept 1 command.
  B. Configure Standard ACL 1 with accepted prefixes.

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  Explanation

• Question 459:

  After a possible security breach, the network administrator of an ISP must verify the times that several different users logged into the network. Which command must the administrator enter to display the login time of each user that activated a session?

  A. show netconf-yang sessions detail
  B. show netconf-yang sessions
  C. show netconf-yang datastores
  D. show platform software yang-management process
  A. show netconf-yang sessions detail

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  Explanation

  https://www.cisco.com/c/en/us/td/docs/ios- xml/ios/prog/configuration/167/b_167_programmability_cg/configuring_yang_datamodel.html

  

• Question 460:

  An engineer is trying to implement BGP in a multihomed architecture. What must the engineer configure to influence inbound path selection?

  A. A route map with WEIGHT attribute to control the inbound traffic.
  B. An offset list to set the metric for routes received from neighboring autonomous systems.
  C. An access list to identify traffic and enable it on both of the provider-facing interfaces.
  D. A route map with AS_PATH attribute to control the inbound traffic.
  D. A route map with AS_PATH attribute to control the inbound traffic.

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  Explanation

  To influence inbound path selection when implementing BGP in a multihomed architecture, an engineer must configure a route map with the AS_PATH attribute. The AS_PATH attribute is used to manipulate the path information to make certain routes more or less attractive, thereby influencing the decision-making process for inbound traffic.