What do you mean by Proxy server?

20. What do you mean by a Proxy server and how to protect it?

Proxy servers are servers that prevent external users who are not authorized to access an IP address from accessing it. When data transmission comes into picture IP addresses are required and so are DNS which route the correct IP address to the domain name. Proxy servers also maintain the list of all blacklisted websites so that all internal users are automatically prevented from any attacks from viruses, worms, etc.

#proxy #server #unauthorized #ipaddress

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Explain in short the meanings of PAN, LAN, HAN, SAN, and WAN.

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