Installation guide

Chapter 10
116 Sniffer Technologies
Data Rate Counters These counters vary depending on the
monitored network:
• For 802.11b/g networks, there are separate
counters for the number of frames sent at 1,
2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 72,
108 Mbps.
• For 802.11a networks, there are separate
counters for the number of frames sent at 6,
9, 12, 18, 24, 36, 48, 54, 72, and 108 Mbps.
• For legacy 802.11b cards, the speeds
remain at 1, 2, 5.5, 11 Mbps.
NOTE: 802.11g is backward-compatible with
802.11b, therefore the speed counters seen in
802.11b are also shown in 802.11g.
802.11b and 802.11g share the same frequency
band (2.4 GHz) and same number of channels
(1-14). 802.11b goes from speeds 1 Mbps to 11
Mbps and 802.11g goes from speeds 1 Mbps to
54 Mbps. 802.11a and 802.11g share similar
speeds (6, 9, 12, 18, 24, 36, 48, 54, 72, and 108
Mbps – 72 and 108 Mbps are proprietary
implementations).
Beacons The number of beacon packets transmitted by
this station. Access points send beacon packets
at a regular interval to synchronize timing
between stations on the same network.
Out Errors The number of error packets transmitted by this
station. Error packets include CRC errors,
undersize errors, oversize errors, WEP ICV
errors, and PLCP errors.
CRC The number of packets with CRC errors sent by
this station.
Undersize The number of packets with undersize errors
sent by this station.
Oversize The number of packets with oversize errors sent
by this station.
Table 10-6. Host Table Counters in the 802.11 Tab (2 of 4)
Counter Description