Problem
1. Draw a diagram to show the use of a proxy server that is installed in the ISP network:
a. Show the transactions between the client, proxy server, and the target server when the response is stored in the proxy server.
b. Show the transactions between the client, proxy server, and the target server when the response is not stored in the proxy server.
2. Find out why IP addresses cannot replace cookies.
3. Find out about Web mirroring, in which caching is done at the server site instead of the client site.