Hypertext Transfer Protocol (HTTP) is specifically designed for transmitting hypertext documents between web clients and servers. It defines how requests and responses are formatted and exchanged over TCP connections. When users browse websites, most of the communication occurs through HTTP or its secure version HTTPS. Thus, the protocol mentioned in the stem refers to HTTP.
Option A:
Option A, file transfer protocol, is used mainly for transferring files between hosts and is known as FTP, not for standard web page delivery.
Option B:
Option B, simple mail transfer protocol, abbreviated SMTP, is used for sending emails and does not handle browser-to-web-server hypertext transfers.
Option C:
Option C is correct because HTTP is explicitly spelled out as Hypertext Transfer Protocol in networking references and is the cornerstone of the World Wide Web.
Option D:
Option D, post office protocol, or POP, is used by email clients to retrieve messages from mail servers and is unrelated to web page transmission.
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