This table defines the transmit and receive bit
rate of the radio on each IEEE 802.11 interface
and the WEP encryption support at those rates.
This table has an expansion dependent relationship
on the ifTable. For each entry in this table,
there exists at least an entry in the ifTable of
ifType ieee80211(71). Entries in this table
cannot be created or deleted by the network
management system. All entries are created or
deleted by the agent.