Cisco 200-101 Online Practice Questions and Exam Preparation

Cisco 200-101 Online Questions & Answers

• Question 41:

  Refer to Exhibit: The internetwork infrastructure of company XYZ consists of a single OSPF area as shown in the graphic. There is concern that a lack of router resources is impeding internetwork performance. As part of examining the router resources, the OSPF DRs need to be known. All the router OSPF priorities are at the default and the router IDs are shown with each router. Which routers are likely to have been elected as DR? (Choose two.)

  

  A. Corp-1
  B. Corp-2
  C. Corp-3
  D. Corp-4
  E. Branch-1
  F. Branch-2
  D. Corp-4
  F. Branch-2

  ---

  There are 2 segments on the topology above which are separated by Corp-3 router.

  Each segment will have a DR so we have 2 DRs.

  To select which router will become DR they will compare their router-IDs. The router with highest (best) router-ID will become DR. The router-ID is chosen in the order below:

  The highest IP address assigned to a loopback (logical) interface.

  If a loopback interface is not defined, the highest IP address of all active router's physical interfaces will be chosen.

  In this question, the IP addresses of loopback interfaces are not mentioned so we will consider IP addresses of all active router's physical interfaces. Router Corp- 4 (10.1.40.40) and Branch-2 (10.2.20.20) have highest "active" IP addresses so

  they will become DRs.

• Question 42:

  Scenario

  Refer to the topology. Your company has connected the routers R1. R2. and R3 with serial links. R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also connected to the routers R4 and R5.

  The EIGRP routing protocol is configured.

  You are required to troubleshoot and resolve the EIGRP issues between the various routers.

  Use the appropriate show commands to troubleshoot the issues.

  

  The loopback interfaces on R4 with the IP addresses of 10.4.4.4 /32, 10.4.4.5/32. and 10.4.4.6/32 are not appearing in the routing table of R5 Why are the interfaces missing?

  A. The interfaces are shutdown, so they are not being advertised.
  B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.
  C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
  D. The loopback addresses haven't been advertised, and the network command is missing on R4.
  B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.

  ---

  For an EIGRP neighbor to form, the following must match:

  -Neighbors must be in the same subnet

  -K values

  -AS numbers

  -Authentication method and key strings

  Here, we see that R4 is configured for EIGRP AS 2, when it should be AS 1.

  

• Question 43:

  Refer to the exhibit.

  

  Assuming that the entire network topology is shown, what is the operational status of the interfaces of R2 as indicated by the command output shown?

  A. One interface has a problem.
  B. Two interfaces have problems.
  C. The interfaces are functioning correctly.
  D. The operational status of the interfaces cannot be determined from the output shown.
  C. The interfaces are functioning correctly.

  ---

  R2 has setup with two interface s0/1 and fa0/0 and both are interfaces configured with IP address and up. "show ip interface brief" showing the status of R2 interfaces.

• Question 44:

  Refer to the exhibit.

  

  Which WAN protocol is being used?

  A. ATM
  B. HDLC
  C. Frame Relay
  D. PPP
  C. Frame Relay

  ---

  "Show interface pos8/0/0" command showing LMI enq sent which show frame-relay encapsulation enabled on this interface. Cisco supports three different Local Management Interface (LMI) types for Frame Relay: Cisco, ANSI Annex D, and Q933-A Annex A http://www.ciscopress.com/articles/article.asp? p=170741andseqNum=3

• Question 45:

  What is the purpose of LCP?

  A. to perform authentication
  B. to negotiate control options
  C. to encapsulate multiple protocols
  D. to specify asynchronous versus synchronous
  B. to negotiate control options

  ---

  Link Control Protocol http://www.ietf.org/rfc/rfc1661.txt In order to be sufficiently versatile to be portable to a wide variety of environments, PPP provides a Link Control Protocol (LCP). The LCP is used to automatically agree upon the encapsulation format options, handle varying limits on sizes of packets, detect a looped- back link and other common misconfiguration errors, and terminate the link. Other optional facilities provided are authentication of the identity of its peer on the link, and determination when a link is functioning properly and when it is failing.

• Question 46:

  Which type of EIGRP route entry describes a feasible successor?

  A. a backup route, stored in the routing table
  B. a primary route, stored in the routing table
  C. a backup route, stored in the topology table
  D. a primary route, stored in the topology table
  C. a backup route, stored in the topology table

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  http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f07.shtml

  Feasible Successors A destination entry is moved from the topology table to the routing table when there is a feasible successor. All minimum cost paths to the destination form a set. From this set, the neighbors that have an advertised metric less than the current routing table metric are considered feasible successors. Feasible successors are viewed by a router as neighbors that are downstream with respect to the destination. These neighbors and the associated metrics are placed in the forwarding table. When a neighbor changes the metric it has been advertising or a topology change occurs in the network, the set of feasible successors may have to be re-evaluated. However, this is not categorized as a route recomputation. Feasible successor is a route whose Advertised Distance (AD) is less than the Feasible Distance (FD) of the current best path. A feasible successor is a backup route, which is not stored in the routing table but, stored in the topology table.

• Question 47:

  Which two options are valid WAN connectivity methods? (Choose two.)

  A. PPP
  B. WAP
  C. DSL
  D. L2TPv3
  E. Ethernet
  A. PPP
  C. DSL

  ---

  On each WAN connection, data is encapsulated into frames before it crosses the WAN link. The following are typical WAN protocols:

  1.

  High-level Data Link Control (HDLC): The Cisco default encapsulation type on point-to-point connections, dedicated links, and circuit-switches connections.

  2.

  PPP: Provides router-to-router and host-to-network connections over synchronous and asynchronous circuits. PPP was designed to work with several network layer protocols, including IP.

  3.

  Frame-relay: A successor to X.25. This protocol is an industry-standard, switches data-link layer protocol that handles multiple virtual circuits

  http://en.wikipedia.org/wiki/Wide_area_network

• Question 48:

  Which statement describes an EIGRP feasible successor route?

  A. A primary route, added to the routing table
  B. A backup route, added to the routing table
  C. A primary route, added to the topology table
  D. A backup route, added to the topology table
  D. A backup route, added to the topology table

• Question 49:

  What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is in active status?

  A. It routes all traffic that is addressed to the destination network to the interface indicated in the routing table.
  B. It sends a copy of its neighbor table to all adjacent routers.
  C. It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.
  D. It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
  C. It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.

  ---

  Introduction to EIGRP Reference: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f07.shtml

  Feasible Successors A destination entry is moved from the topology table to the routing table when there is a feasible successor. All minimum cost paths to the destination form a set. From this set, the neighbors that have an advertised metric less than the current routing table metric are considered feasible successors. Feasible successors are viewed by a router as neighbors that are downstream with respect to the destination. These neighbors and the associated metrics are placed in the forwarding table. When a neighbor changes the metric it has been advertising or a topology change occurs in the network, the set of feasible successors may have to be re-evaluated. However, this is not categorized as a route recomputation.

  Route States A topology table entry for a destination can have one of two states. A route is considered in the Passive state when a router is not performing a route recomputation. The route is in Active state when a router is undergoing a route recomputation. If there are always feasible successors, a route never has to go into Active state and avoids a route recomputation.

  When there are no feasible successors, a route goes into Active state and a route recomputation occurs. A route recomputation commences with a router sending a query packet to all neighbors. Neighboring routers can either reply if they have feasible successors for the destination or optionally return a query indicating that they are performing a route recomputation. While in Active state, a router cannot change the next-hop neighbor it is using to forward packets. Once all replies are received for a given query, the destination can transition to Passive state and a new successor can be selected. When a link to a neighbor that is the only feasible successor goes down, all routes through that neighbor commence a route recomputation and enter the Active state.

• Question 50:

  Which statement is true, as relates to classful or classless routing?

  A. Classful routing protocols send the subnet mask in routing updates.
  B. RIPv1 and OSPF are classless routing protocols.
  C. Automatic summarization at classful boundaries can cause problems on discontiguous subnets.
  D. EIGRP and OSPF are classful routing protocols and summarize routes by default.
  C. Automatic summarization at classful boundaries can cause problems on discontiguous subnets.

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  http://www.ciscopress.com/articles/article.asp?p=174107andseqNum=3

  RIPv1, RIPv2, IGRP, and EIGRP all auto-summarize classful boundaries by default (OSPF does not).To make discontiguous networks work, meaning you don't want classful boundries to summarize, you need to turn off auto-summary.