Ad Hoc mode and IBSS
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Ad Hoc mode and IBSS
- The radios that make up an IBSS network consist solely of client stations (STAs), and no access point is deployed.
- An IBSS can, however, have multiple client stations in one physical area communicating in an adhoc fashion.
- All of the stations transmit frames to each other directly and do not route their frames from one client to another.
- All client station frame exchanges in an IBSS are peer to peer.
- All stations in an IBSS must contend for the half-duplex medium, and at any given time only one STA can be transmitting.
- In order for IBSS communications to succeed, all stations must be transmitting on the same frequency channel.
- Standalone wireless stations connected together as a group must share the same SSID WLAN name.
- Another caveat of an IBSS is that a BSSID address is created.
The first station that starts up in an IBSS randomly generates a BSSID in the MAC address format.
This randomly generated BSSID is a virtual MAC address and is used for layer 2 identification purposes within the IBSS.
Reference:
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.
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