Question: 1.Internet packets have different lengths. Assume 10 packets have been received such that two are over-length, four have medium length, and four are short. How

1.Internet packets have different lengths. Assume 10 packets have been received such that two are over-length, four have medium length, and four are short. How many different packet patterns are possible?

2.In Time Division Multiple Access (TDMA) communication, a time frame is divided into ten time slots such that each time slot can be used by any user. Suppose that a frame is received that contains three packets due to user 1, two due to user 2, and the rest of the time slots were empty. How many frame patterns are possible?

3.A router receives 15 packets from 15 different sources. How many ways could these packets be received?

4.A packet buffer has 50 packets. If it is known that 15 of those packets belong to a certain user and the rest belong to different users then in how many possibilities can these packets be stored in the buffer?

5.A router receives 10 packets such that four of them are in error. How many different packet patterns are possible?

6.In a cellular phone environment, a cell has 100 users that want access and there are only 16 available channels. How many different possibilities exist for choosing among these users?

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