• define protocols
• explain why communication protocols are necessary
• state the 4 things a message should contain for successful communication between computers
• define network
• define communication
• describe the TCP protocol
• describe the re-transmission of a missing packet
• state the protocols used in transport layer
• state the protocols used in network layer
• state the 4 layers in TCP/IP protocol
• outline how the layers are operated during transmission
• describe the use of layers

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• state the 8 protocols associated with the application layer.

• briefly describe HTTP

• describe SMTP & its use

• describe POP3/4

• briefly describe IMAP

• briefly describe DNS

• explain how a webpage requested by user can be displayed on their computer

• describe FTP & its uses