If there is an existing 802.11g WLAN at a site， which service can be provided without conducting anew site survey？（）A、Add a new 802.11a WLANB、Increase the Layer 2 and Layer 3 security of the WLANC、Increase the throughput for the wireless clientsD、Add new
题目
If there is an existing 802.11g WLAN at a site， which service can be provided without conducting anew site survey？（）
- A、Add a new 802.11a WLAN
- B、Increase the Layer 2 and Layer 3 security of the WLAN
- C、Increase the throughput for the wireless clients
- D、Add new services （such as voice） over the WLAN