The mobile node (a computer with wireless network card support) gathered together in a small space to form the horizontal connection (peer-to-peer) between them. The mobile node has a wireless network card is that they are able to exchange information directly with each other, do not need network administrators. For ad-hoc networks can make fast and easy, they usually be set without a tool or any special skills so it is very suitable for use in the trade conference or in the temporary working group. However, they can have the disadvantages of limited coverage, every user must listen to each other.
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