Legacy Network

The term Legacy Network is a name of a popular and famous networking company as well that is operating worldwide to provide different solutions to the network problems that arise in the networking world and along with that, the company also produces new devices for the networks, however, this article does not deal with that company, that is, this article deals with this term with reference to the networking world, not with some company or any other perspective.
The term legacy is used to define a set of equipment, computer system, technology, method and applications which are obsolete and are no longer being produced by the company, but are still being used by an individual or an organization. From this definition you can guess that what the term legacy network means, however, the exact definition of the term is given in the following material.

The term legacy network in the networking world has two meanings attached to it.

Firstly the tem legacy network is used to describe a network that is present in an organization, and is still being used by it, but is based on older and outdated protocols. The best example of such network is a network that is not based on the IP or TCP/IP protocols, like the IPX or the SNA are considered the legacy networks and those companies who still want to use these networks with the IP based networks have to install or make use of certain other new features which enables this old network to work with the newer one, however, even after all this effort they are still called a legacy network.

Secondly the term can be used to describe the wireless networks that are based on the older 802.11x standards, which were made or announced before the 802.11n standard. The example of these legacy standards are 802.11a, 802.11b and 802.11g.