1.A proxy server provides a gateway between users and the Internet. It is a server, called a "mediator" because it runs between end users and the web pages they visit online.
2. When a computer connects to the Internet, it uses an IP address. This is similar to the street address of your home, telling the incoming data where to go, and using the return address marker to send out data for other devices to authenticate. A proxy server is essentially a computer on the Internet with its own IP address.
Agents provide a valuable layer of security for your computer. They can be set up as a network filter or firewall to protect your computer from Internet threats such as malware.
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