A-LevelComputer ScienceCommunication and internet technologies9618/31 · Oct/Nov 2023 · Q26 Marks

Draw one line to connect each protocol to its most appropriate use. Protocol HTTP BitTorrent SMTP IMAP Use to provide peer-to-peer file sharing when retrieving email messages from a mail server over a TCP/IP connection when transmitting hypertext documents to map MAC addresses onto IP addresses when sending email messages towards the intended destination

(a)Draw one line to connect each protocol to its most appropriate use. Protocol HTTP BitTorrent SMTP IMAP Use to provide peer-to-peer file sharing when retrieving email messages from a mail server over a TCP/IP connection when transmitting hypertext documents to map MAC addresses onto IP addresses when sending email messages towards the intended destination[4]
(b)Outline the purpose of the Link layer in the TCP/IP protocol suite.[2]

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Mark scheme

Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.

[1] One mark for each correct line connecting a protocol to its most appropriate description (Max 4).
[1] MP1 To ensure correct network protocols are followed
[1] MP2 To enable the upper layers to access the physical medium // enables connection/ communication with the internet / network layer
[1] MP3 To be responsible for transporting data within the network/local segments
[1] MP4 To format the data into frames for transmission
[1] MP5 Maps IP addresses to MAC/Physical addresses.

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