1) An Ethernet frame contains 1100 bytes of payload data. Calculate the percentage of the frame that is overhead (do not include the preamble in the frame). In order to do this, you will need to look up the length of the header and trailer.

2) Assume an Ethernet frame is to carry only 31 bytes of payload data. How many bytes of padding must be added to the frame?

3) Hosts A and B are on the same collision domain. Both transmit at the same time. The following steps occur after the collision. Put them in order, with 1 immediately after the collision and 4 the last step to recover from the collision.

_______A sends

_______A and B choose different backoff times A chooses 4 msec, B chooses 3 msec

_______B sends

______ A and B both detect the collision

4) State whether there will there be a collision in each of the following situations.

a. Two hosts transmit through a hub simultaneously.

b. Two hosts transmit through a full-duplex switched Ethernet switch simultaneously?