Same for: 15.1.2 Check Your Understanding – TCP and UDP
1. Which layer of the TCP/IP model is responsible for ensuring packets are sent reliably and any missing packets are resent?
- application layer
- transport layer
- internetwork layer
- network access layer
Explanation: The transport layer in both the TCP/IP and OSI models is responsible for ensuring packets are sent reliably and any missing packets are resent.
2. True or False: The Transport Control Protocol (TCP) does not keep track of segments sent to the destination.
- true
- false
Explanation: False. TCP keeps track of the number of segments that have been sent to a specific host from a specific application.
3. True or False: The User Datagram Protocol (UDP) does not use acknowledgments to track the receipt of segments.
- true
- false
Explanation: True. UDP is a ‘best effort’ delivery system that does not require acknowledgment of receipt.