Thanks much for your responses and recommendations.
Having done more research including what information is useful when asking such questions, I have this to offer:
usb 2-2: configuration #1 chosen from 1 choice
usb 2-2: New USB device found, idVendor=148f, idProduct=2573
usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 2-2: Product: 802.11 bg WLAN
usb 2-2: Manufacturer: Ralink
Following informations is result of:'/usr/sbin/iwconfig'
lo no wireless extensions.
eth0 no wireless extensions.
wmaster0 no wireless extensions.
wlan0 IEEE 802.11g ESSID:""
Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
Retry min limit:7 RTS thr
ff Fragment thr=2352 B
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
Below information is from 'sudo /usr/sbin/iwlist scan'
lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
wmaster0 Interface doesn't support scanning.
wlan0 Scan completed :
Cell 01 - Address: 00:18:4D:8E:3C:EA
Frequency:2.462 GHz (Channel 11)
Quality=52/100 Signal level=-48 dBm
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
12 Mb/s; 24 Mb/s; 36 Mb/s; 9 Mb/s; 18 Mb/s
48 Mb/s; 54 Mb/s