802.11n on Xubuntu - Linux

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如何去確認無線網路使用802.11n? ap route:d-link D605L 802.11n
Wireless USB Adapter:BUFFALO n150
Linux 4.2.0-27-generic i686

wlan1 IEEE 802.11bgn ESSID:"?????"
Mode:Managed Frequency:2.462 GHz Access Point: ??:??:??:??:??:??

"Bit Rate=1 Mb/s" !!!!
Tx-Power=27 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=53/70 Signal level=-57 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:14 Invalid misc:71 Missed beacon:0

Bus 001 Device 003: ID 0411:01a2 BUFFALO INC. (formerly MelCo., Inc.)
WLI-UC-GNM Wireless LAN Adapter [Ralink RT8070]


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