Answer / sagar

Where a high level of security of required, a proxy Web
server may be used to provide a gateway between a local
area network and the Internet. The local network is
protected by firewall software installed on the proxy
server. This software enables the proxy server to keep the
two worlds separate. All outward HTTP requests from the
local network pass through the proxy server and similarly
all information retrieved comes back in via the proxy
server and is then passed back to the client. Using the
options or preferences, Web browsers can be configured to
point to the proxy server. Proxy servers will normally
maintain a cache of retrieved documents.

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