[solved] – Question 91665

Assume you have an IP network connection with the following characteristics:

• 97% of packets reach their destination correctly in less than 50ms

• 1% of packets reach their destination correctly in more than 50ms but less than 10,000ms.

• 1% of packets are lost in transit

• 1% of packets arrive at their destination in less than 50ms but have one or two random single-bit errors.

For each of the following applications, indicate and explain your decision whether it would be best to use TCP with checksum, or UDP with checksum, or UDP without checksum:

(a) A live audio / video chat system like Skype

(b) A general purpose network file system such as NFS: https://en.wikipedia.org/wiki/Network_File_System

(c) Remote control of a bomb disposal robot (each packet contains an array of floating-point numbers indicating the current desired location of the robot)

Expert Answer

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