Expand a definition of a complex concept from computer science. Start with the definition and use one or more of the following techniques for expanding them:

• Make the definition more specific
• Give concrete examples
• Describe the components
• Describe the basic operating principles
• Explain the origin of the word
• Outline purpose or usage
• Compare and contrast the concept / object with a similar concept / object

Target the writing to classmates who are not in computer science subfield.

25. The client-server model in a computer network describes a) The interaction between a human and a computer where services are provided by the computer in response to requests initiated by the human. b) The relationship of cooperating computers where the server component provides services to one or many clients which initiate requests for such services. X c) The interaction between a computer and a network switch. d) The interaction of between a computer and a network router. e) All of the above

which of the following functions are performed by the OSI transport layer?

1. data compression
2. routing
3. definition of a signal’s electrical characteristics
4. e-mail
5. Data segmentation and reassembly
6. Reliable message delivery
7. End-to-End Flow Control