What is Ad hoc and Infrastructure Mode

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Adhoc Mode

ad-hoc mode is a method for wireless devices to directly communicate with each other. Operating in ad-hoc mode allows all wireless devices within range of each other to discover and communicate in peer-to-peer fashion without involving central access points (including those built in to broadband wireless Routers).

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Infrastructure Mode

Click Hereto know about: configuring a wireless accesspoint

Infrastructure mode is one of the two methods for connecting to wireless networks with Wi-Fi enabled devices such as laptops, Pda’s I-phone etc. These devices are connected to wireless network with the help of Access point (AP). Wireless Access Points are usually routers or switches which are connected to internet by Ethernet port.

Wireless Access points are always required for infrastructure mode of wireless networking. It is necessary to use SSID while configuring AP, this SSID should be known to clients for their computers to connect WLAN. SSID is basically security key which help prevent UN authorized access to WLAN.  The Access point is then connected to wire network (Internet) to provide wireless internet connectivity to clients. Multiple access points can be added in the WLAN, this increases the reach of infrastructure for supporting many number of wireless clients.