Do I Know This Already? Quiz

"Do I Know This Already?" Quiz

The purpose of the "Do I Know This Already?" quiz is to help you decide what parts of this chapter to use. If you already intend to read the entire chapter, you do not necessarily need to answer these questions now.

The 14-question quiz, derived from the major sections in the "Foundation Topics" portion of the chapter, helps you to determine how to spend your limited study time.

Table 15-1 outlines the major topics discussed in this chapter and the "Do I Know This Already?" quiz questions that correspond to those topics.

Table 15-1. "Do I Know This Already?" Foundation Topics Section-to-Question Mapping

Foundation Topics Section	Questions Covered in This Section
Introduction to BGP and Communicating with other Autonomous Systems	13
Overview of the BGP Operation	46
Basic Configuration Commands to Connect to Another Autonomous System	79
Managing and Verifying the BGP Configuration	1012
Alternative Methods of Connecting to an Autonomous System	1314

CAUTION

The goal of self-assessment is to gauge your mastery of the topics in this chapter. If you do not know the answer to a question or are only partially sure of the answer, you should mark this question wrong for purposes of the self-assessment. Giving yourself credit for an answer you correctly guess skews your self-assessment results and might provide you with a false sense of security.

1:	In BGP, what is an attribute? Topology table criteria Characteristics of a path , similar to a metric Links in an update Neighbor table entry
2:	Which of the following are key features of BGP? Periodic keepalives Periodic updates Poison reverse Triggered updates
3:	What is the routing protocol eBGP used to communicate between? Routers within an autonomous system Routers in different countries Routers in different autonomous systems Routers running different IGPs
4:	What is the transport protocol for BGP? BGP runs directly on top of the data-link layer IP UDP TCP
5:	When are full routing updates sent in BGP? At the beginning of each session Whenever a fault is seen on the link Every 30 minutes At the startup of the BGP process
6:	Which of the following are BGP message types? Updates Keepalives ACK Notification
7:	What is the purpose of the network command? To advertise the stated network To identify the interfaces to run BGP To forward stated networks To create neighbors with within these networks
8:	What is the purpose of the neighbor command? Forces the path to be chosen Identifies the next hop router and sends LSAs and Hellos States the address and autonomous system of the neighbor with whom to peer States the neighbor that might be considered as feasible paths
9:	What command enables the BGP process? router bgp remote autonomous-system-number router bgp process-id ip routing bgp router bgp autonomous-system-number
10:	Which command is used to show the BGP connections between peers? show ip bgp connections show ip bgp neighbor show ip bgp sessions show ip bgp topology
11:	Which command is used to show all BGP connections? show ip bgp connections show ip bgp sessions show ip bgp topology show ip bgp summary
12:	What is the purpose of the command clear ip bgp ? To disconnect all sessions To clear the BGP routing table To end an administrative session To clear all IGP entries from the routing table
13:	Which of the following are valid alternatives to using BGP when connecting to another autonomous system? Using FTP Default routes Static routes Merging the two autonomous systems into one
14:	What is the administrative distance of a static route that has been configured to point to the outgoing interface? 100 1 255

The answers to the "Do I Know This Already?" quiz are found in Appendix A, "Answers to Chapter 'Do I Know This Already?' Quizzes and Q&A Sections." The suggested choices for your next step are as follows :

• 7 or less overall score Read the entire chapter. This includes the "Foundation Topics" and "Foundation Summary" sections, the "Q&A" section, and the "Scenarios" at the end of the chapter.

• 810 overall score Begin with the "Foundation Summary" section, and then go to the "Q&A" section and the "Scenarios" at the end of the chapter. If you have trouble with these exercises, read the appropriate sections in "Foundation Topics."

• 11 or more overall score If you want more review on these topics, skip to the "Foundation Summary" section, and then go to the "Q&A" section and the "Scenarios" at the end of the chapter. Otherwise, move to the next chapter.