Proxy+Servers

Introduction
A proxy server sits between a network and the Internet, acting as an intermediary between the two.



Note that a ﬁrewall may be installed on the network’s proxy server.

A proxy server has the following main functionality:
 * Caching
 * Local network security
 * Filtering
 * Anonymity

Task
Find out how a proxy server carries out the 4 functions above. Write a sentence explaining each.