Explain the architecture and usage of isdn, Computer Networking

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Computer Networks

1. Write about different network structures in use.

2. Explain the architecture and usage of ISDN.

3. Describe the concept of framing in Data Link Layer and its importance in data communication.

4. Differentiate Noisy and Noiseless channels in Data Communication.

5. Elucidate Connection states and POP3 commands and responses.

6. Elaborate the two modes of IP Security.

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