EIGRP Chapter 1: Configuration and Operation

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Questions and Answers

What is the primary method used by EIGRP to prevent routing loops?

  • Diffusing Update Algorithm (DUAL) (correct)
  • EIGRP authentication
  • Route summarization
  • Administrative distance

What is the purpose of the Administrative Distance (AD) in EIGRP?

  • To summarize the routing updates
  • To determine the reliability of the route
  • To optimize the routing information
  • To define the trustworthiness of the source route (correct)

What is a feature of EIGRP that provides for fast convergence time?

  • Keeping a list of loop-free backup routes (correct)
  • EIGRP authentication
  • Route summarization
  • Configuring the autonomous system number

What does the EIGRP autonomous system number function as?

<p>A process ID (B)</p>
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What is the global command that enables EIGRP?

<p>Router(config)#router eigrp autonomous-system (A)</p>
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What is a requirement for all routers in the EIGRP routing domain?

<p>They must use the same process ID number (B)</p>
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What is the primary function of the network command in EIGRP configuration?

<p>To enable interfaces to transmit and receive EIGRP updates (C)</p>
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What is the purpose of the wildcard mask in the network command?

<p>To advertise specific subnets in EIGRP updates (B)</p>
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What command is used to view the neighbor table and verify that EIGRP has established adjacencies with neighbors?

<p>show ip eigrp neighbors (A)</p>
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What letter is used to denote EIGRP routes in a routing table?

<p>D (A)</p>
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What is the default behavior of EIGRP regarding route summarization?

<p>EIGRP always summarizes routes at major network boundaries (C)</p>
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Which command is used to verify EIGRP routing configuration?

<p>show ip route (D)</p>
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What is the primary purpose of IGRP, which was developed in 1985?

<p>To overcome RIPv1's limited hop count (B)</p>
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Which of the following metrics is used by IGRP by default?

<p>Bandwidth and Delay (D)</p>
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What is the primary component of an EIGRP message that contains the source and destination IP address?

<p>IP packet header (B)</p>
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What is the primary purpose of the DUAL finite state machine in EIGRP?

<p>To calculate the composite metric (A)</p>
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What is the primary reason IGRP was discontinued starting with IOS 12.2(13)T & 12.2(R1s4)S?

<p>Due to its replacement by EIGRP (D)</p>
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What is the primary component of an EIGRP message that contains the AS number?

<p>EIGRP packet header (B)</p>
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