A-LevelComputer ScienceCommunication and internet technologies9618/32 · May/June 2025 · Q104 Marks

Identify the two main protocols that form Transport Layer Security (TLS) and state the purpose of each. Protocol 1 Purpose Protocol 2 Purpose

Identify the two main protocols that form Transport Layer Security (TLS) and state the purpose of each. Protocol 1 Purpose Protocol 2 Purpose[4]

Mark scheme

Marking points from the official mark scheme (May/June 2025). The mark or mark type is shown in brackets.

MP1 Handshake protocol
MP2 To establish a secure and reliable connection between two devices, systems or networks // Permits the web server and client to authenticate each other to make use of encryption algorithms
MP3 Record protocol
MP4 Provides a secure and reliable way to send and receive data over a network // To exchange records between the client and server // Responsible for securing application data end ensuring its integrity and authenticity during transmission // Encrypts and authenticates data exchanged between a client and a server // Deals with the format for data transmission.

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Topic: Communication and internet technologies, A-Level Computer Science (syllabus 9618). Structured question, 4 marks.
Source: A-Level Computer Science, May/June 2025 Paper 3 Variant 2, question 10.

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