我有
03:00.0 Network controller: Intel Corporation Centrino Wireless-N 2200 (rev c4)
如何確定該卡/驅動程式是否支援 5 GHz?
答案1
透過運行找出介面名稱iwconfig
$ iwconfig
eth0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:"EvanCarroll"
Mode:Managed Frequency:2.437 GHz Access Point: D8:50:E6:44:B2:C8
Bit Rate=19.5 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=61/70 Signal level=-49 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:1 Invalid misc:80 Missed beacon:0
在這種情況下wlan0
,然後運行iwlist <interface> freq
,
$ iwlist wlan0 freq
wlan0 13 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Current Frequency:2.437 GHz (Channel 6)
這些通道均不在 2.4 GHz 之外。它不支援 5 GHz。
答案2
如果您想了解您的卡片支持什麼,iw phy
這是一個很好的解決方案很多更多資訊(包括支援的頻段)。
iwlist
顯示更多您的區域設定中可用和/或允許的內容、由於 DFS 通道等而停用的內容,而不是您的裝置支援的內容。從iwlist
手冊頁:
freq[uency]/channel Give the list of available frequencies in the device and the number of defined channels. Please note that usually the driver returns the total number of channels and only the frequencies available in the present locale, so there is no one-to-one mapping between frequencies displayed and channel numbers.
答案3
執行 iwconfig 時,您將獲得以下可能的資訊:
- IEEE 802.11bgn = 僅 2.4 GHz
- IEEE 802.11gn = 僅 2.4 GHz
- IEEE 802.11agn = 2.4 GHz + 5 GHz