Internet
Internet is the world-wide network of devices accessible to anyone, or we can also say is is a network of Computers which is open for all. It itself contains a large number of intranets. It has unlimited number of users, and has a unlimited visitors traffic too. It is never ending source of information. Collection of various LANs, WANs, MANs. etc... creates a internet.
Intranet
Intranet is network of device for a specific group of users. It can not be accessed from Internet. It has a limited number of Users. It contains only information required for the group of users. It is generally any LAN, MAN or WAN.
Extranet
An Extranet is actually an Intranet that is accessible to authorized outsiders with few limitation. The actual server is behind a firewall. The firewall helps to control access between the Intranet and Internet. It allow to access the Intranet only to some people. The access level can be controlled and can be set to different levels for individuals or groups of outside users. The access can be based on a username and password, IP address or physical address (MAC ID).
Internet is the world-wide network of devices accessible to anyone, or we can also say is is a network of Computers which is open for all. It itself contains a large number of intranets. It has unlimited number of users, and has a unlimited visitors traffic too. It is never ending source of information. Collection of various LANs, WANs, MANs. etc... creates a internet.
Intranet
Intranet is network of device for a specific group of users. It can not be accessed from Internet. It has a limited number of Users. It contains only information required for the group of users. It is generally any LAN, MAN or WAN.
Extranet
An Extranet is actually an Intranet that is accessible to authorized outsiders with few limitation. The actual server is behind a firewall. The firewall helps to control access between the Intranet and Internet. It allow to access the Intranet only to some people. The access level can be controlled and can be set to different levels for individuals or groups of outside users. The access can be based on a username and password, IP address or physical address (MAC ID).
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