A-LevelComputer ScienceCommunication and internet technologies9618/31 · Oct/Nov 2024 · Q44 Marks

The TCP/IP protocol may be viewed as a stack that contains four layers: Application, Transport, Internet, Link. Describe how the layers of the TCP/IP protocol stack interact with each other.

Describe how the layers of the TCP/IP protocol stack interact with each other.[4]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2024). The mark or mark type is shown in brackets.

4 One mark per mark point (Max 4)
4 MP1 Each layer can only accept input from the next higher layer or the next lower layer
4 MP2 There is an interface between the adjacent layers which is the only interaction between layers
4 MP3 Data is added to the headers as the frames/packets pass through the layers
4 MP4 The interactions are carried out by installed software
4 MP5 User interaction takes place at the highest/Application layer of the stack through protocols associated with that layer of the stack
4 MP6 Direct access to hardware takes place at the lowest/Link layer of the stack.

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About this question

Topic

Communication and internet technologies, A-Level Computer Science (syllabus 9618). Structured question, 4 marks.

Source

A-Level Computer Science, Oct/Nov 2024 Paper 3 Variant 1, question 4.

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