Tcp ip network interview questions

Tcp ip network interview questions
1)Discuss the role of TCP/IP on a data network. Also identify and explain why this is the protocol of choice in networking.
2)What is the port no of TCP?
3)Difference between controlled access & Contention based access in a shared media?
4)Congestion happens in which layer in osi?
5)What type of protocol used in sms sending from mobile?
6)Which is the Smallest protocol?
7)What is the difference of TCP over IP?
8)What is proxy?
9)What is the difference between server and database?

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