1. Differentiate between WANs and LANs.
2. Why it useful to have more than one possible path through a network for each pair of
stations?
3. What are the four generic architectural components of a public communications
network? Define each term.
4. What is the principal application that has driven the design of circuit-switching
networks?
5. Distinguish between static and alternate routing in a circuit-switching network.
6. What is the difference between in channel and common channel signaling?
7. What data rates and traffic types are associated with the ISDN B and D channels?
8. What is a semi permanent connection?
9. What data rates are offered for ISDN primary access?
10. Explain the difference between datagram and virtual circuit operation.
11. What are some advantages of private networks?
12. What are some of the limitations of using a circuit-switching network for data
transmission?
13. What is value-added network (VAN)?
14. Why is packet switching impractical for digital voice transmission?