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Chapter 9
Appendix
Glossary
LAN（Local Area
Network）
Abbreviation for Local Area Network. Refers to a small scale computer network.
Beacon
This is a data packet periodically sent by the access point to simplify the connection with the wireless LAN
client device.
Power save mode
There are two operating modes of the wireless client: power save mode and active mode.
The power save mode intermittently places the device in sleep mode to save on power. The active mode
always provides power to the communication circuit.
DTIM
（ Delivery Traffic Indication
Message ）
This is a message to a wireless client in power save mode that a packet is waiting to be transmitted. This
packet is a message transmitted to stating that the device is in transmission standby. For example, if set to
“2” , a beacon with DTIM and a beacon without are able to be mutually transmitted from the access point.