It -220 Chapter 5 Page 187-191 Q and a 1-37 Odd.

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IT -220
Chapter 5
page 187-191
Q and A 1-37 odd.

1. What are the four layers of the TCP/IP model?
i. Application – Defines the applications used to process requests and what ports and sockets are used. I. (This layer is used to process requests from hosts and to make sure a connection is made to an appropriate port.) ii. Transport – Defines the type of connection established between hosts and how acknowledgements are sent. iii. Internet – Defines the protocols used for addressing and routing the data packets. iv. Network Interface – Defines how the host connects to the network.

3. What are well known ports?
Also known as “reserve ports”, which are ports 1 – 1023 that are reserved by ICANN (Internet Corporation for Assigned Names and Numbers).

Port Number Assignments
Port Numbers Description
1 - 1023 The “well known” ports
1024 – 49,151 Registered ports
49,152 – 65,535 Private Ports

5. Define the purpose of a connection oriented protocol. Give an example. i. Establishes the network connection, manages the data transfer, and terminates the connection. I. Connection Oriented Protocol – Establishes a network connection, manages the delivery of data, and terminates the connection. ii. The TCP (Transport Control Protocol) protocol within the TCP/IP transport layer. I. TCP protocol establishes a set of rules or guidelines for establishing the connection.

7. What is the purpose of a sequence number (SEQ=) in TCP data packets? SEQ (Sequence Number) is used to keep track of the data packets being transferred from Host A to Host B.

9. Describe how a TCP connection is terminated.
i. The host sends a FIN (Finish) packet to the other connected host. 1. Host B sends a FIN packet to Host A indicating the data transmission is complete. 2. Host A responds...
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