Homework #3 - CSIS 625 - Fall 2002 - Section 1
Due Week 10 (Nov 11, 2002) by classtime

Email this document with your answers filled in to droelke@stthomas.edu
The email should contain your answers as plain text in the body of the document.
It should not be sent as an attachment to your email.

Name:

Define the following:
1) Circuit Switched Network:
2) Virtual Circuit:
3) ISDN BRI:
4) PAD:
5) FRAD:
6) ATM:
7) AAL:
8) VPI:
9) ABR:
10) SDH:
11) STS-3c:
 
Short Answer:

12) Describe the life of a virtual circuit.
   What happens from the start of a virtual circuit until the end.

13) What are strengths and weaknesses of a space division switch
   compared with a time division switch.

14) Give strengths and weaknesses of using packet switched networks 
   vs. circuit switched networks.

15) Compare switched virtual circuits with permanent virtual circuits.  
    Why would a network designer use one over the other?

16) Explain what the B and D channels in ISDN are and what they are used for.

17) Describe the similarities and differences between a PBX System, 
    a Key System, and a Centrex service.  

18) Compare the different methods of determining "cost" in least 
    cost routing. Explain advantages and disadvantages of each.