Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 101:

  Which regular expression will match prefixes from the AS 200 that is directly connected to our AS?

  A. ^$
  B. ^200)
  C. _200$
  D. _200_
  E. ^200_
  E. ^200_

  ---

  Table 2 Commonly Used Regular Expressions Expression

  Meaning * Anything ^$ Locally originated routes ^100_ Learned from autonomous system 100 _100$ Originated in autonomous system 100 _100_ Any instance of autonomous system 100 ^[0-9]+$ Directly connected autonomous system paths

  Reference:

  http://www.cisco.com/c/en/us/td/docs/ios/termserv/configuration/guide/12_4t/tsv_12_4t_bo ok/tsv_reg_express.html

• Question 102:

  A company has just opened two remote branch offices that need to be connected to the corporate network. Which interface configuration output can be applied to the corporate router to allow communication to the remote sites?

  A. interface Tunnel0 bandwidth 1536 ip address 209.165.200.230 255.255.255.224 tunnel source Serial0/0 tunnel mode gre multipoint
  B. interface fa0/0 bandwidth 1536 ip address 209.165.200.230 255.255.255.224 tunnel mode gre multipoint
  C. interface Tunnel0 bandwidth 1536 ip address 209.165.200.231 255.255.255.224 tunnel source 209.165.201.1 tunnel-mode dynamic
  D. interface fa 0/0 bandwidth 1536 ip address 209.165.200.231 255.255.255.224 tunnel source 192.168.161.2 tunnel destination 209.165.201.1 tunnel-mode dynamic
  A. interface Tunnel0 bandwidth 1536 ip address 209.165.200.230 255.255.255.224 tunnel source Serial0/0 tunnel mode gre multipoint

• Question 103:

  You are tasked with configuring a router on an OSPF domain to import routes from an EIGRP domain and summarize the routes to 192.168.64.0. Which statement configures the summarized route and provides equal-path route redundancy?

  A. area 32 range 192.168.64.0 255.255.192.0 cost 100
  B. area 32 range 192.168.64.0 255.255.63.0 cost 100
  C. area 32 range 192.168.64.0 255.255.64.0 cost 100
  D. area 32 range 192.168.64.0 255.255.192.0 multi-path
  A. area 32 range 192.168.64.0 255.255.192.0 cost 100

  ---

  area range

  To consolidate and summarize routes at an area boundary, use the area range command in router configuration mode. To disable this function, use the no form of this command.

  Syntax Description

  area-id

  Identifier of the area about which routes are to be summarized. It can be specified as either a decimal value or as an IP address.

  ip-address

  IP address.

  mask

  IP address mask.

  advertise

  (Optional) Sets the address range status to advertise and generates a Type 3 summary link-state advertisement (LSA).

  not-advertise

  (Optional) Sets the address range status to DoNotAdvertise. The Type 3 summary LSA is suppressed, and the component networks remain hidden from other networks.

  cost cost

  (Optional) Metric or cost for this summary route, which is used during OSPF SPF calculation to determine the shortest paths to the destination. The value can be 0 to 16777215.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/ios/12_2/iproute/command/reference/fiprrp_r/1rfospf.

  html#wp1017596

• Question 104:

  Which statement about the overload bit in IS-IS is true?

  A. The IS-IS adjacencies on the links for which the overload bit is set are brought down.
  B. Routers running SPF ignore LSPs with the overload bit set and hence avoid blackholing traffic.
  C. A router setting the overload bit becomes unreachable to all other routers in the IS-IS area.
  D. The overload bit in IS-IS is used only for external prefixes.
  B. Routers running SPF ignore LSPs with the overload bit set and hence avoid blackholing traffic.

  ---

  The OL bit is used to prevent unintentional blackholing of packets in BGP transit networks. Due to the nature of these protocols, IS-IS and OSPF converge must faster than BGP. Thus there is a possibility that while the IGP has converged, IBGP is still learning the routes. In that case if other IBGP routers start sending traffic towards this IBGP router that has not yet completely converged it will start dropping traffic. This is because it isnt yet aware of the complete BGP routes. OL bit comes handy in such situations. When a new IBGP neighbor is added or a router restarts, the IS-IS OL bit is set. Since directly connected (including loopbacks) addresses on an "overloaded" router are considered by other routers, IBGP can be bought up and can begin exchanging routes. Other routers will not use this router for transit traffic and will route the packets out through an alternate path. Once BGP has converged, the OL bit is cleared and this router can begin forwarding transit traffic.

  Reference: https://routingfreak.wordpress.com/category/ospf-vs-is-is/

• Question 105:

  Refer to the exhibit.

  

  If EIGRP is configured between two routers as shown in this output, which statement about their EIGRP relationship is true?

  A. The routers will establish an EIGRP relationship successfully.
  B. The routers are using different authentication key-strings.
  C. The reliability metric is enabled.
  D. The delay metric is disabled.
  C. The reliability metric is enabled.

  ---

  The 5 K values used in EIGRP are: K1 = Bandwidth modifier K2 = Load modifier K3 = Delay modifier K4 = Reliability modifier K5 = Additional Reliability modifier

  However, by default, only K1 and K3 are used (bandwidth and delay). In this output we see that K1, K3, and K4 (Reliability) are all set.

• Question 106:

  Which two characteristics of an loT network are true? (Choose two.)

  A. The transmission rate in an loT network is consistent.
  B. loT networks must be designed for low-powered devices.
  C. loT networks use IS-IS for routing.
  D. loT networks are 100% reliable
  E. loT networks are bandwidth constrained
  B. loT networks must be designed for low-powered devices.
  E. loT networks are bandwidth constrained

• Question 107:

  Refer to the exhibit.

  

  If the downstream router has a summary route configured, which two actions must you take on the local router to create the summary route that summarizes all routes from the downstream router? (Choose two.)

  A. Configure the summary address on the interface.
  B. Use 10.0.0.0 255.248.0.0 as the summary route.
  C. Configure the summary address in the EIGRP process.
  D. Use 10.0.0.0 255.252.0.0 as the summary route.
  E. Configure a route map to permit the route.
  F. Configure a distribute list in.
  A. Configure the summary address on the interface.
  B. Use 10.0.0.0 255.248.0.0 as the summary route.

  ---

  Route summarization works in conjunction with the ip summary-address eigrp interface configuration command, in which additional summarization can be performed. To correctly summarize all the networks shown, the correct route to use is

  10.0.0.0 255.248.0.0

  Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_2/ip/configuration/guide/fipr_c/1cfeigrp.html

• Question 108:

  Which two OSPF LSA types are flooded within the originating area? (Choose two.)

  A. type 1, Router LSA
  B. type 2, Network LSA
  C. type 3, Network Summary LSA
  D. type 4, ASBR Summary LSA
  E. type 6, Group Membership LSA
  F. type 9, Opaque LSA
  A. type 1, Router LSA
  B. type 2, Network LSA

  ---

  OSPF relies on several types of Link State Advertisements (LSAs) to communicate link state information between neighbors. A brief review of the most applicable LSA types: Type 1 - Represents a router Type 2 - Represents the pseudonode (designated router) for a multiaccess link Type 3 - A network link summary (internal route) Type 4 - Represents an ASBR Type 5 - A route external to the OSPF domain Type 7 - Used in stub areas in place of a type 5 LSA LSA types 1 and 2 are found in all areas, and are never flooded outside of an area. They are only flooded within the area that they originated from.

  Reference: http://packetlife.net/blog/2008/jun/24/ospf-area-types/

• Question 109:

  When you enable the MPLS Multi-VRF feature, which two supported routing protocols can be used to exchange routing information between PE routers and CE routers? (Choose two.)

  A. BGP
  B. RIP
  C. OSPF
  D. EIGRP
  E. IS-IS
  A. BGP
  B. RIP

• Question 110:

  While troubleshooting an issue for a remote user, you must capture the communication between the user's computer and a server at your location. The traffic passes through a Cisco IOS-XE capable switch. Which statement about obtaining the capture is true?

  A. The Embedded Packet Capture application in the IOS-XE Software can capture the packets, but there is a performance impact.
  B. The Embedded Packet Capture application in the IOS-XE Software can capture the packets without impacting performance.
  C. The Mini Protocol Analyzer embedded in the IOS-XE Software can capture the packets without impacting performance.
  D. The Mini Protocol Analyzer embedded in the IOS-XE Software can be used to capture the packets, but there is a performance impact.
  E. Wireshark can capture packets through a SPAN port, but there is a performance impact.
  A. The Embedded Packet Capture application in the IOS-XE Software can capture the packets, but there is a performance impact.