No, you do not need to know the OSI layers... These are simplified into 3 layers for the IPT course.
·[FONT="] [/FONT]The three different layers include:
[FONT="]o[FONT="] [/FONT][/FONT]Application Level (between sender and receiver)
[FONT="]o[FONT="] [/FONT][/FONT]Communication Control and Addressing Level (Encoding and Decoding message)
[FONT="]o[FONT="] [/FONT][/FONT]Transmission Level (how the data is physically transmitted, eg. Wired transmission)