"Do I Know This Already?" Quiz

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

The 10-question quiz, derived from the major sections in "Foundation Topics" section of the chapter, helps you determine how to spend your limited study time.

Table 8-1 outlines the major topics discussed in this chapter and the "Do I Know This Already?" quiz questions that correspond to those topics.

Table 8-1. "Do I Know This Already?" Foundation Topics Section-to-Question Mapping

Foundation Topics Section Covering These Questions	Questions	Score
Compression	15
Link Fragmentation and Interleave	610
Total Score

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

• 8 or less overall score Read the entire chapter. This includes the "Foundation Topics," the "Foundation Summary," and the "Q&A" sections.
  
  
• 9 or 10 overall score If you want more review on these topics, skip to the "Foundation Summary" section and then go to the "Q&A" section. Otherwise, move to the next chapter.
  
  

Compression Questions

1.	With CB RTP header compression, which of the following are compressed? RTP header TCP header IP header UDP header Data
2.	With CB TCP header compression, which of the following are compressed? RTP header TCP header IP header UDP header Data
3.	With Layer 2 payload compression, which of the following could be compressed? RTP header TCP header IP header UDP header Data
4.	Which of the following Modular QoS Command-Line Interface (MQC) class subcommands enables CB RTP header compression? compression ip header rtp compression header ip rtp compression ip rtp compression header compression header ip
5.	In the show policy-map interface command output, with TCP or RTP header compression enabled, what does "efficiency improvement factor" mean? The number of bytes that would have been sent without compression, per second The ratio of bytes actually sent, over the number of bytes that would have been sent without compression The ratio of bytes that would have been sent without compression, over the number of bytes actually sent The compression ratio

Link Fragmentation and Interleave Questions

6.	What fragment size, in bytes, should be used on a 256-Kbps link in order to ensure each fragment has less than or equal to 10 ms of serialization delay? 80 160 214 240 320 480
7.	What serialization delay, in milliseconds, would be experienced by a 160 byte fragment on a 64-kbps link? 5 10 15 20 25 30 35 40
8.	A router has MLP LFI configured on interface s0/0. The bandwidth 128 command is already configured on the multilink interface. Which of the following commands is used under a multilink interface in order to set the fragment size to 160 bytes? ppp multilink fragment-delay 10 ppp multilink fragment-size 160 ppp multilink interleave ppp fragment-delay 10 ppp fragment-size 160
9.	A router has FRF.12 configured for all VC's on interface s0/0. The bandwidth 128 command is already configured on the interface. Which of the following commands is used under the map-class frame-relay command in order to set the fragment size to 160 bytes? frame-relay fragment 10 frame-relay fragment 160 frame-relay traffic-shaping fragment 10 fragment 160
10.	Which of the following commands list statistics about the number of fragments created with FRF.12? show queueing interface show fragments show interfaces show frame-relay fragment