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Problem 1
What are the three operations of the datalink layer that commonly apply to the two different types of links?
- framing
- flow control
- error comtrol
Problem 2
What is the protocol sublayer that is necessary for only the broadcast link type?
- MAC
Problem 3
Cyclic code is a special type of the linear block code. What two properties does it have？
- Addition of two codes is a code
- Rotating a code makes a code 循环
Problem 4
Give two conditions under which the Banyan network is non-blocking.
- Data are input in the increasing order of destination port number
- There is no "hole" (empty input ports) between the sorted inputs
Problem 5
Answer the following questions about MAC address.
- What is the broadcast address?(in hexadecimal)
Answer: ff-ff-ff-ff-ff-ff
- 90-9f-33-3d-40 is not a multicast address. Briefly explain why?
(Hint: the broadcast address is a special case of the multicast address)
Answer: The least significant bit in the first byte is 0, which means unicast.