$1.$ We say a switch is a layer $\_\_\_$ device.

$2.$ A switch will always record the source MAC address of a frame. True$/$false$?$

$3.$ All machines on the same channel will always process all frames transmitted on the channel.

True$/$false$?$

$4.$ How does a switch$/$bridge learn that a station is on a given port?

$5.$ What does a switch$/$bridge do if it does not know the out$$going port of a destination MAC address?

$6.$ How is a token ring similar to a Master$$and$$slave or polling channel access protocol?

$7.$ The forwarding table of a switch$/$AP keeps track of what?

$8.$ Why is multiplexing important?

$9.$ What$$s the key advantage of asynchronous over synchronous TDM$?$

$10.$ A node using CSMA over a wireless channel is able to hear all transmissions. True$/$False$.$