Cisco Networking Academy – Semester 4
Name: ____________________
STUDY GUIDE FOR CHAPTER 6
1. What type of error correction does Frame Relay offer?
2. What is a DLCI? What does it mean when the curriculum said that DLCI’s have
“local significance” or “global significance”?
3. What is a LMI? What are the three supported LMI types?
4. Describe what a CIR is? What approximate CIR would you need for a small
company with two small offices, ten users at each site, connected via Frame Relay.
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Cisco Networking Academy – Semester 4
5. What is an FECN? What device sends it? Receives it?
6. What is an BECN? What device sends it? Receives it?
7. During a time of congestion, what packets are dropped first?
8. What is TDM and how does Frame Relay take advantage of it?
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Cisco Networking Academy – Semester 4
9. Look at the following network:
Router A
Router B
DLCI=36
DLCI=125
Router C
Router D
DLCI=25
DLCI=6
If DLCI’s have local significance, what can the DLCI for Router A be, if
connecting from Router B, D, or C?
If DLCI’s have global significance, what can the DLCI for Router A be, if
connecting from Router B, D, or C?
10. What is a PVC?
11. What is the one common and three optional LMI Extensions? What is the function of
each?
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12. What is one major benefit, with regards to network management, of using Global
Addressing?
13. How is Inverse ARP used for Global Addressing?
14. What benefits do subinterfaces offer? (Why would you use them in a network you
are designing?)
15. What is the difference between configuring Subinterfaces to connect to a remote
router using Point-to-point connections versus Multipoint? Which do you think
would be easier to setup?
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16. What command will display all PVC connections on a router?
17. What command will display LMI traffic statistics?
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