ITPEC IP October 2021 Question 39
Which of the following is a protocol that is used for encrypted communication between a web server and a web browser that are connected through HTTPS?
Explanation
TLS — the protocol that encrypts HTTP traffic between browser and web server; HTTPS is HTTP over TLS.
TLS (Transport Layer Security), the successor of SSL, first has the server present a digital certificate so the browser can confirm it is talking to the genuine site, then agrees a shared session key and encrypts all later traffic with it. This protects the communication from eavesdropping and tampering. A URL starting with https: means TLS is in use.
Answer (d)
Why not others:
- •(a) SEO — Search Engine Optimization, making a website rank higher in search results
- •(b) SPEC — a benchmark organisation and its test suites for measuring computer performance
- •(c) SQL — the language for defining and querying relational databases
Key rule: HTTPS = HTTP + SSL/TLS: TLS authenticates the server with a certificate and encrypts the traffic, giving confidentiality and integrity in transit.
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