Cisco 400-201 Online Practice Questions and Exam Preparation

Cisco 400-201 Online Questions & Answers

• Question 11:

  What is the function of the AJB bits on DS1 using Extended Super Frame (ESF)?

  A. It is used for signaling on-hook and off-hook status.
  B. It carries CRC information for error detection.
  C. It is used for a control and performance information.
  D. It is used for a frame's synchronization and alignment.
  A. It is used for signaling on-hook and off-hook status.

• Question 12:

  Which statement about the overlay VPN model is true?

  A. The overlay model demands a lot from provisioning because when adding one customer site, it demands many configuration changes at many other routers on the provider side.
  B. The overlay model does not scale to the same size as the MPLS VPN model.
  C. The overlay model provides the ability to reduce the amount of routing state that core routers need to hold to meet the scalability requirements compared to the MPLS VPN model.
  D. The overlay model provides privacy and isolation between the different customers by using packet filters that control the data to and from the customer routers.
  C. The overlay model provides the ability to reduce the amount of routing state that core routers need to hold to meet the scalability requirements compared to the MPLS VPN model.

• Question 13:

  A network operator is designing a BGP traffic engineering policy that uses the MED attribute to influence outbound traffic. This policy prefers routes that are received from upstream peers with a lower MED. All other higher preference BGP attributes values are equal. Which Cisco IOS BGP command enables this functionality?

  A. Bgp always-compare-med
  B. Bgp bestpath med-confed
  C. Bgp deterministic-med
  D. Bgp bestpath med missing-as-worst
  A. Bgp always-compare-med

• Question 14:

  Drag and drop the characteristics of Cisco IOS and Cisco IOS XR from the left onto the correct kernel, memory management, and software packaging categories on the right

  Select and Place:

  

  

• Question 15:

  What is one of the functions of a LISP ingress tunnel router?

  A. Ability to integrity-check LISP site registration messages using a SHA2-based HMAC algorithm
  B. Responsible for finding EID-to-RLOC mappings for all traffic destined for LISP-capable sites
  C. Accept encapsulation Map-request messages, decapsulate them to the MS responsible for the ETR authoritative for the requested EIDs
  D. Allows EIDs and RLOCs to communicate in a LISP site that contains EIDs in one address family and RLOCs in a different address family
  B. Responsible for finding EID-to-RLOC mappings for all traffic destined for LISP-capable sites

• Question 16:

  A network has a single exit and is using a default route An operator is worried about denial of service at the network border Which unicastRPF check mode must the operator apply at the border for optimal protection?

  A. loose mode with allow self ping
  B. loose mode
  C. strict mode with allow-self-ping
  D. strict mode with allow-default option
  E. strict mode
  D. strict mode with allow-default option

• Question 17:

  Which three options are restrictions for MPLS VPN BGP Local Convergence? (Choose three.)

  A. The MPLS VPN BGP Local Convergence feature affects only traffic that is exiting the VPN. Therefore, it cannot fully protect traffic end-to-end by itself.
  B. This link protection can be initiated during a HA SSO. But links that were configured with this protection before the switchover begins remain protected after the switchover.
  C. The MPLS VPN BGP Local Convergence feature for IPv4/IPV6 supports the eBGP, RIP, EIGRP,OSPF, and dynamic routing protocols.
  D. Any next-hop core tunneling technology that is supported by BGP is also supported for protection, including MPLS, L2TPv3, and IP/GRE. CSC protocol between the PE and CE is also supported. Interautonomous system option A (backto-back VRF) is supported because it is essentially the same as performing the PE-CE link protection in both autonomous systems. However, interautonomous system options B and C protection are not supported.
  E. If you perform an in-service software downgrade from an image that does include this link protection to an image that does not support this feature, active protection is halted when BGP routes are refreshed.
  A. The MPLS VPN BGP Local Convergence feature affects only traffic that is exiting the VPN. Therefore, it cannot fully protect traffic end-to-end by itself.
  D. Any next-hop core tunneling technology that is supported by BGP is also supported for protection, including MPLS, L2TPv3, and IP/GRE. CSC protocol between the PE and CE is also supported. Interautonomous system option A (backto-back VRF) is supported because it is essentially the same as performing the PE-CE link protection in both autonomous systems. However, interautonomous system options B and C protection are not supported.
  E. If you perform an in-service software downgrade from an image that does include this link protection to an image that does not support this feature, active protection is halted when BGP routes are refreshed.

• Question 18:

  

  Refer to the exhibit. A network engineer is deploying the this RTBH filtering configuration template on 100 Cisco IOS XR router. What is missing from this configuration?

  A. The BGP wee-known community no-advertised in the set community command
  B. A static route with tag 66 on the trigger router
  C. A route policy that matches community 6544422
  D. A tag 66 on the static route that is applied to all 100 routers
  D. A tag 66 on the static route that is applied to all 100 routers

• Question 19:

  A network engineer is asked to connect two customer sites using Layer 2 connectivity over an MPLS backbone. One customer site uses PPP connectivity with the service provider and the other customer site uses Frame Relay connectivity with the service provider. Which option can the network engineer use to enable network connectivity between these two customer sites?

  A. GRE tunnels
  B. IP interworking
  C. Ethernet interworking
  D. L2TPv3 tunnels
  B. IP interworking

• Question 20:

  Refer to the exhibit.

  

  An engineer is looking the CE1 routing table for CE2 Loopback 0. Each CE runs OSPF with its PE.

  Which statement describes why the CE2 Loopback address is installed as an external OSPF route at the CE1 routing table?

  A. PE1 and PE2 have mutual redistribution between OSPF and BGP.
  B. CE1 is configured under OSPF with the command redistribute connected.
  C. CE1 and CE2 are in different areas.
  D. CE1 and CE2 have different OSPF processes.
  E. PE1 and PE2 have different OSPF VRF processes.
  E. PE1 and PE2 have different OSPF VRF processes.