both part

1, Which protocol is used by FTP to transfer files over the Internet? Which protocol is used by HTTP to get info from web? Which protocol is used by DNS to retrieve the IP address of a mail server? TCP or UDP? Why? 2. What is the purpose of TCP/UDP port numbers ? Identify the sockets on sender/receiver, To track the different conversations crossing the network at the same time 3. During data transfer, what is the sending/receiving host responsible for ? Segment, encapsulation, acknowledgement, reassembly. 4, what is the difference between TCP and UDP? 5. what four values are required for connection-oriented demultiplexing? What values are required for connectionless demultiplexing? 6. Transport layer aggregates data from different applications into a single stream before passing it to which layer? 7. Transport layer protocols deals with a) application to application communication b) process to process communication c) node to node communication d) man to man communication 8. Which transport protocol uses 4-tuple to identify its socket? TCP, UDP? 9, what is checksum field used in UDP segment? Error detection 10. Which field in TCP segment format can be used for flow control and how? Receive window( rwnd) 11. What is the purpose of Timer in the implementation of reliable data transfer protocol? 12. Does UDP retransmit packet due to packet loss? 13. What does TCP stand for? UDP stand for? 14. Your company wants to develop a multimedia application that stream video to internet users. It can tolerate the loss of some frames. What transport protocol do you recommend? TCP or UDP