However, this rarely happens. In the worst case, the user must log out from the network and then log back in. However, if the wired LAN is Token Ring, then roaming becomes a problem. This is due to the source routing characteristics of Token Ring, which remember where a PC notebook was in the network. Even if the PC notebook appears in another part of the network, the LAN server would not know about it.
Broadcast filtering Another consideration in designing an access point is broadcast filtering.
In a regular wired LAN network, there is a lot of broadcasting traffic. This includes broadcast, group, and function data frames. Normally, the frame relaying or bridge program will forward all these broadcast data frames from the wired LAN to the PC notebook. If we go one layer up from the data link layer to the transport layer, we realize that most of these broadcast, group, and function data frames are not meant to be received by all stations or those stations associated with the group or function address. These frames are meant to locate a particular station in the network.