Cisco 350-501 Online Practice Questions and Exam Preparation

Cisco 350-501 Online Questions & Answers

• Question 111:

  What is a key capability of EVPN?

  A. providing built-in support for native integration with third-party cloud platforms
  B. supporting multitenancy for Layer 2 and Layer 3 VPN services
  C. establishing IPv6 overlay networks over IPv4 networks
  D. enabling real-time voice and video traffic optimization
  B. supporting multitenancy for Layer 2 and Layer 3 VPN services

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  Explanation

• Question 112:

  Refer to the exhibit.

  

  

  LDP peering between routers R1 and R2 is dropped when the link between R1 and R2 is taken offline. However, LDP peering between R2 and R3 stays up when the link between R2 and R3 is taken offline.

  Which action allows MPLS traffic forwarding to continue normally if the link between R1 and R2 goes down?

  A. Enable IGP and LDP Synchronization on R1.
  B. Implement LDP Session Protection on R1.
  C. Enable IGP and LDP Synchronization on R2.
  D. Implement LDP Session Protection on R2.
  B. Implement LDP Session Protection on R1.

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  Explanation

• Question 113:

  Refer to the exhibit.

  

  After implementing a new design for the network, a technician reviews the pictures CLI output as part of the MOP.

  Which two elements describe what the technician can ascertain from the ImpNull output? (Choose two.)

  A. Ultimate Hop Popping is in use for the prefix displayed.
  B. Penultimate Hop Popping is in use for the prefix displayed.
  C. Label 0 is used for the prefix displayed, but will not be part of the MPLS label stack for packets destined for 192.168.10.10.
  D. Label 3 is in use for the prefix displayed and will be part of the MPLS label stack for packets destined for 192.168.10.10.
  E. Label 0 is used for the prefix displayed and will be part of the MPLS label stack for packets destined for 192.168.10.10.
  B. Penultimate Hop Popping is in use for the prefix displayed.
  D. Label 3 is in use for the prefix displayed and will be part of the MPLS label stack for packets destined for 192.168.10.10.

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  Explanation

  Implicit null is by default which means penultimate router should only send IP packet thus it pops the label (popping the label known as PHP and this is done to reduce the load on last hop router)

  References:

  https://community.cisco.com/t5/mpls/implicit-null-and-explicit-null/td-p/1496792 https://networkzblogger.com/2017/03/21/mpls-explicit-and-implicit-null-label/

• Question 114:

  Refer to the exhibit.

  

  A large service provider is migrating device management from Layer 2 VLAN-based to Layer 3 IP-based solution. An engineer must configure the ISIS solution with these requirements:

  1. Network management server IP 172.16.10.1 must be advertised from the core MPLS network to the regional domain.

  2. The external network 202.10.0.0/24 must not establish ISIS peering with the R5 router.

  3. The regional network must prevent sending unnecessary hello packets and flooding the routing tables of the R5 router.

  Which two ISIS parameters must be implemented to meet these requirements? (Choose two.)

  A. LSP lifetime maximum
  B. advertise-passive-only
  C. overload bit passive
  D. attached bit on ISIS instance
  E. passive-interface Loopback0
  B. advertise-passive-only
  E. passive-interface Loopback0

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  Explanation

• Question 115:

  What should a network engineer consider before implementing segment routing?

  A. It is an MPLS-based routing technique.
  B. It is a source-based routing technique.
  C. It is a multicast-based routing technique.
  D. It is a destination-based routing technique.
  C. It is a multicast-based routing technique.

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  Explanation

• Question 116:

  Refer to the exhibit.

  

  Over the last few months, ISP A has doubled its user base. The IT Director asked the engineering team to monitor memory consumption and buffer statistics on all P and PE devices in the MPLS core. Most devices have CPU usage of 70% or more, so the solution must be targeted and secure.

  Which two commands must the engineering team implement on P and PE devices to meet these requirements? (Choose two.)

  A. snmp-server enable traps memory bufferpeak
  B. snmp-server host 192.168.101.1 version 1 community1 auth memory
  C. snmp-server enable snmp-traps community1 bufferpeak
  D. snmp-server host 192.168.101.1 version 2c community1 memory
  E. snmp-server host 192.168.101.1 version 3 auth community1 memory
  A. snmp-server enable traps memory bufferpeak
  E. snmp-server host 192.168.101.1 version 3 auth community1 memory

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  Explanation

  To monitor memory consumption and buffer statistics securely on P and PE devices in an MPLS core, especially considering the high CPU usage, the engineering team should implement SNMP version 3 for its security features.

• Question 117:

  The NOC engineer in a service provider network must configure an SNMP community on switch SW with these security attributes:

  1. Event messages must be authenticated with the MD5 algorithm and encrypted.

  2. The remote user name for the SNMP server at 172.16.10.1 is AuthNocUser.

  Which configuration must the engineer apply to the switch?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  A. Option A

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  Explanation

• Question 118:

  Refer to the exhibit.

  

  ASN 64501 currently reaches the networks under the 10.0.0.0/8 prefix via the North_B router, which is a slow backup link.

  The administrator of ASN 64502 wants traffic from ASN 64501 to 10.0.0.0/8 to travel via the primary link North_A.

  Which change to the network configuration accomplishes this task?

  A. Set a higher local preference between North_A and South_A
  B. Advertise the 10.0.0.0/8 prefix through North_B and specific subnets through North_A
  C. Set a Lower Weight value for incoming traffic on North_A
  D. Set a lower MED between North_B and South_B
  B. Advertise the 10.0.0.0/8 prefix through North_B and specific subnets through North_A

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  Explanation

• Question 119:

  Which two tasks must you perform when you implement LDP NSF on your network? (Choose two.)

  A. Enable NSF for BGP.
  B. Implement direct connections for LDP peers.
  C. Enable NSF for EIGRP.
  D. Disable Cisco Express Forwarding.
  E. Enable NSF for the link-state routing protocol that is in use on the network.
  A. Enable NSF for BGP.
  E. Enable NSF for the link-state routing protocol that is in use on the network.

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  Explanation

  Again just repeating what people said before.

  A you do have to enable NSF for BGP.

  cant be B because it works for connected and non-connected peers.

  LDP NSF works with LDP sessions between directly connected peers and with peers that are not directly connected (targeted sessions).

  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ha/configuration/15-sy/mp-ha-15-sy-book/mp-ldp-grace-nsfsso.html

• Question 120:

  BGP has been implemented on a IOS XR router.

  Which configuration sends BGP IPv4 labels to build inter-domain LSPs?

  A. router bgp 65515address-family ipv4 unicastneighbor 172.16.70.23 send-community extended
  B. router bgp 65515no bgp default ipv4-unicast
  C. router bgp 65515address-family ipv4 unicastneighbor 172.16.70.23 send-community
  D. router bgp 65515neighbor 172.16.70.23address-family ipv4 labeled-unicast
  D. router bgp 65515neighbor 172.16.70.23address-family ipv4 labeled-unicast

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  Explanation

  In Cisco IOS XR, to send BGP IPv4 labels to build inter-domain Label Switched Paths (LSPs), the configuration command used is router bgp 65515 neighbor 172.16.70.23 address-family ipv4 labeled-unicast. This command specifies that the router should use the BGP labeled unicast address family for the specified neighbor, which enables the exchange of label information along with the IPv4 routing information, facilitating MPLS LSP creation for inter-domain traffic.

  Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) training materials.