Chapter 1 Implement EIGRP operations Chapter 2 Implement multiarea OSPF operations Chapter 4 Implement Cisco IOS routing features...

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2 Table of Contents Chapter Chapter 2 Implement multiarea OSPF operations Chapter 3 Describe integrated IS-IS Chapter 4 Implement Cisco IOS routing features Chapter 5 Implement BGP for enterprise ISP connectivity Chapter 6 Implement multicast forwarding... 75

3 Chapter 7 Implement IPv

4 BSCI ( ) Printables Copyright 2009 by PrepLogic, LLC. Product ID: Production Date: May 27, 2009 Total Questions: 168 All rights reserved. No part of this document shall be stored in a retrieval system or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without written permission from the publisher. No patent liability is assumed with respect to the use of the information contained herein. Warning and Disclaimer Every effort has been made to make this document as complete and as accurate as possible, but no warranty or fitness is implied. The publisher and authors assume no responsibility for errors or omissions. The information provided is on an "as is" basis. The authors and the publisher shall have neither liability nor responsibility to any person or entity with respect to any loss or damages arising from the information contained in this document. Volume, Corporate, and Educational Sales PrepLogic offers favorable discounts on all products when ordered in quantity. For more information, please contact PrepLogic directly: solutions@preplogic.com

5 Chapter 1 1. In Exhibit 1, Router R1 is connected to Router R2 with a point-to-point interface with a bandwidth which is set to 64,000 bps. What is the EIGRP hello interval which is used between R1 and R2? Select the best answer. A. B. C. D. 10 Seconds 5 seconds 30 seconds 60 seconds Find the Answer p. 94 Exhibit(s): 2. In Exhibit 1, Router R1 is connected to Router R2 with a point-to-point interface. What is the maximum amount of bandwidth that EIGRP will use on this link? Select the best answer. A. B. C. D. 768,000 bps (768 Kbps) 1,544,000 bps (1.544 Mbps) 772,000 bps (772 Kbps) 256,000 bps (256 Kbps) Find the Answer p. 94 Exhibit(s): 2

6 3. Router A is configured to utilize the reliability of the interface as well as the default parameters for metric calculation while Router B is configured to utilize the default parameters. Once the interface has been enabled between Router A and Router B what will be the status of this adjacency? Select the best answer. A. B. C. D. Up, each router will deal with the differences in metric internally. Down, the parameters which are used to calculate the metric must be the same on both sides of the link (K-values). Up, On setup EIGRP performs a metric balancing between the routers on the link. Down, if the metrics used are different on both sides of the link additional manual setup must be configured before the adjacency will establish. Find the Answer p Which different types of EIGRP packet type are always sent reliably? Select the best answer. A. B. C. D. Hello and Reply packet types. Hello and Update packet types. Query and Reply packet types. Update, Query and Reply packet types. Find the Answer p. 94 3

7 5. Referring to Exhibit 1, you want to summarize the /16 network on Router A. What is the correct command used to configure an EIGRP summary route on this R1? Select the best answer. A. B. C. D. R1(config-if)#ip summary-address R1(config)#ip summary-address eigrp R1(config-if)#ip summary-address eigrp R1(config-router)#ip summary-address eigrp Find the Answer p. 94 Exhibit(s): 4

8 Answers: Chapter 1 1. B Review Question p. 2 Detailed Explanation p C Detailed Explanation p B Detailed Explanation p D Detailed Explanation p C Review Question p. 4 Detailed Explanation p B Review Question p. 5 Detailed Explanation p C Review Question p. 5 Detailed Explanation p A Review Question p. 6 Detailed Explanation p D Review Question p. 6 Detailed Explanation p A Review Question p. 6 Detailed Explanation p C Review Question p. 7 Detailed Explanation p D Review Question p. 7 Detailed Explanation p A, C Review Question p. 8 Detailed Explanation p B Review Question p. 10 Detailed Explanation p D Review Question p. 10 Detailed Explanation p C Review Question p. 11 Detailed Explanation p D Review Question p. 13 Detailed Explanation p D Review Question p. 13 Detailed Explanation p C Review Question p. 13 Detailed Explanation p C Review Question p. 14 Detailed Explanation p B Review Question p. 15 Detailed Explanation p C Review Question p. 15 Detailed Explanation p D Review Question p. 16 Detailed Explanation p

9 106 : Chapter 1 1. Review Question p. 2 Answers: B Explanation A. Incorrect, EIGRP only uses two different hello intervals by default. 60 seconds for low speed NBMA network interfaces like multipoint interfaces which have a bandwidth of below T1 (1.544 Mbps), ATM SVC's and ISDN BRI interfaces. 5 Seconds for all other interfaces like Ethernet, Token Ring, FDDI, point-to-point (any speed), and multipoint interfaces over T1 speeds (1.544 Mbps). Explanation B. Correct, EIGRP uses a hello interval of 5 seconds for Ethernet, Token Ring, FDDI, point-to-point (any speed), and multipoint interfaces under T1 speeds (1.544 Mbps). Explanation C. Incorrect, EIGRP only uses two different hello intervals by default. 60 seconds for low speed NBMA network interfaces like multipoint interfaces which have a bandwidth of below T1 (1.544 Mbps), ATM SVC's and ISDN BRI interfaces. 5 Seconds for all other interfaces like Ethernet, Token Ring, FDDI, point-to-point (any speed), and multipoint interfaces over T1 speeds (1.544 Mbps). Explanation D. Incorrect, EIGRP uses two different hello intervals by default. 60 seconds for low speed NBMA network interfaces like multipoint interfaces which have a bandwidth of below T1 (1.544 Mbps), ATM SVC's and ISDN BRI interfaces. 5 Seconds for all other interfaces like Ethernet, Token Ring, FDDI, point-to-point (any speed), and multipoint interfaces over T1 speeds (1.544 Mbps). PrepLogic Question: Answers: C Explanation A. Incorrect, While 768,000 bps (768 Kbps) is 50% of the useable T1 bandwidth; the 50% is calculated based on the configured bandwidth statement. Since this is not set on serial interfaces, the bandwidth defaults to 1,544,000 bps (1.544 Mbps), 50% of 1,544,000 bps (1.544 Mbps) is 772,000 bps (772 Kbps). Explanation B. Incorrect, EIGRP utilizes a feature called EIGRP pacing. EIGRP pacing only allows EIGRP traffic to utilize 50% of the overall interface bandwidth by default so that this traffic will not affect "normal" traffic. The default bandwidth on this type of interface is 1,544,000 bps (1.544 Mbps), so 50% of this would be 772,000 bps (772 Kbps).

10 107 Explanation C. Correct, EIGRP pacing defaults to using 50% of the interface bandwidth. In this case the interface defaults to 1,544,000 bps (1.544 Mbps), so 50% of this is 772,000 bps (772 Kbps). Explanation D. Incorrect, EIGRP utilizes a feature called EIGRP pacing. EIGRP pacing only allows EIGRP traffic to utilize 50% of the overall interface bandwidth by default so that this traffic will not effect "normal" traffic. The default bandwidth on this type of interface is 1,544,000 bps (1.544 Mbps), so 50% of this would be 772,000 bps (772 Kbps). PrepLogic Question: Answers: B Explanation A. Incorrect, EIGRP has no internal mechanism which allows this configuration because if the K-values are not the same EIGRP will not establish an adjacency. Explanation B. Correct, EIGRP requires that the K-values be the same on both sides of a connection before an adjacency will establish. Explanation C. Incorrect, there is no mechanism for metric balancing in EIGRP. The K-values on each side of a connection must match in order for an adjacency to establish. Explanation D. Incorrect, there are no other manual configuration commands which will allow this configuration. EIGRP requires that the K-values used on both side of a connection match in order for an adjacency to establish. PrepLogic Question: Answers: D Explanation A. Incorrect, the Reply packet type is always sent via reliable unicast. However, the Hello packet type is sent via multicast without the need for acknowledgement. Explanation B. Incorrect, the Update packet type is sent via reliable unicast and multicast. However, the Hello packet type is sent via multicast without the need for acknowledgement. Explanation C. Incorrect, the Query packet type is sent via reliable multicast and the Reply packet type is sent via reliable unicast. However, the Update packet type is also

11 108 sent reliably via both unicast and multicast. Explanation D. Correct, the Update packet type is sent via reliable unicast and multicast, the Query packet type is sent via reliable multicast and the Reply packet type is sent via reliable unicast. PrepLogic Question: Review Question p. 4 Answers: C Explanation A. Incorrect, the correct syntax for EIGRP summarization is ip summary-address eigrp as-number ip-address mask configured on the interface the summary is sent out on. Explanation B. Incorrect, the correct syntax for EIGRP summarization is ip summary-address eigrp as-number ip-address mask configured on the interface the summary is sent out on. Explanation C. Correct, the syntax for EIGRP summarization is ip summary-address eigrp as-number ip-address mask configured on the interface the summary is sent out on. Explanation D. Incorrect, while the syntax is correct for the command; in order for this command to work it must be entered in interface configuration mode not router configuration mode. PrepLogic Question: Review Question p. 5 Answers: B Explanation A. Incorrect, by default the hold time is three times the hello timer interval which makes the default 15 seconds. However this is not automatically calculated if the hello timer has changed because of this the hold timer is still set to 15 seconds. Explanation B. Correct, because the default hold timer is 15 seconds and the hold timer is not automatically changed when the hello timer changes. Explanation C. Incorrect, while this would be three times the hello interval; the hold timer is not automatically recalculated when the hello timer is changed. The default hello timer for this type of interface is 5 seconds making the hold timer 15 seconds. Explanation D. Incorrect, the default hold timer is three times the hello timer but