1. Which layer is responsible for establishing a temporary communication session between the source and destination host applications?

2. Which three are transport layer responsibilities? (Choose three.)

3. Which transport layer protocol statement is true?

4. Which transport layer protocol would be used for VoIP applications?

5. Which transport layer protocol ensures reliable same-order delivery?

6. Which TCP header statement is true?

7. Which two applications would use the TCP transport layer protocol? (Choose two.)

8. Which of the following is a stateless best-effort delivery transport layer protocol?

9. Which UDP header statement is true?

10. Which two applications would use the UDP transport layer protocol? (Choose two.)

11. Which two fields are the same in a TCP and UDP header? (Choose two.)

12. Assume a host with IP address wants to request web services from a server at Which of the following would display the correct socket pair?

13. Which port group includes port numbers for FTP, HTTP, and TFTP applications?

14. Which Windows command would display the protocols in use, the local address and port numbers, the foreign address and port numbers, and the connection state?

15. Which of the following would be valid source and destination ports for a host connecting to an email server?

16. Which control bit flags are used during the three-way handshake?

17. How many exchanges are needed to end both sessions between two hosts?

18. What field is used by the destination host to reassemble segments into the original order?

19. What field is used to provide flow control?

20. What happens when a sending host senses there is congestion?

21. Why is UDP desirable for protocols that make a simple request and reply transactions?

22. Which UDP datagram reassembly statement is true?

23. Which of the following would be valid source and destination ports for a host connecting to a DNS server?

24. Which transport layer feature is used to establish a connection-oriented session?

TCP uses the 3-way handshake. UDP does not use this feature. The 3-way handshake ensures there is connectivity between the source and destination devices before transmission occurs.

25. What is the complete range of TCP and UDP well-known ports?

There are three ranges of TCP and UDP ports. The well-know range of port numbers is from 0 – 1023.

26. What is a socket?

A socket is a combination of the source IP address and source port or the destination IP address and the destination port number.

27. How does a networked server manage requests from multiple clients for different services?

Each service provided by a server, such as email or file transfers, uses a specific port number. The source port number of a service request identifies the client that is requesting services. The destination port number identifies the specific service. Servers do not use address information to provide services. Routers and switches use addressing information to move traffic through the network.

28. What happens if part of an FTP message is not delivered to the destination?

Because FTP uses TCP as its transport layer protocol, sequence and acknowledgment numbers will identify the missing segments, which will be re-sent to complete the message.

29. What type of applications are best suited for using UDP?

UDP is not a connection-oriented protocol and does not provide retransmission, sequencing, or flow control mechanisms. It provides basic transport layer functions with  a much lower overhead than TCP. Lower overhead makes UDP suitable for applications which are sensitive to delay.