340_C4

1. Explain the differences between ISDN and IDN. How is ISDN accessed?

2. What is broadband ISDN? Compare and contrast the services used in B-ISDN.

3. Which are the three layers under X.25 protocol in relation to the OSI layer?

4. What are the advantages and disadvantages of ATM compared with X.25?

5. Explain the ATM protocol architecture.

6. Give two examples of ATM networks.