Question

Which of the following represents an application-layer protocol? A. SMTP B. IP C. SPX D. TCP

    Which of the following represents an application-layer protocol?
A. SMTP
B. IP
C. SPX
D. TCP

CompTIA Network plus Certification Study Guide

CompTIA Network plus Certification Study Guide

Glen Clarke 4th Edition

Chapter 2, Problem 14

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Which of the following represents an application-layer protocol? A. SMTP B. IP C. SPX D. TCP

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Key Concepts

Application Layer

The application layer is the topmost layer in networking models such as the TCP/IP and OSI model. It provides services directly to user applications and defines protocols for data exchange that are tailored to specific end-user services, such as email and web browsing.

Application-Layer Protocol

An application-layer protocol establishes the rules and conventions used for communication between network applications. These protocols, like SMTP, are designed to facilitate specific functions such as sending emails, transferring files, or browsing the web.

SMTP

SMTP (Simple Mail Transfer Protocol) is an application-layer protocol used primarily for sending and relaying email messages. It enables the transfer of email data between servers and is a fundamental component of email communication on the Internet.

Protocol Stack

A protocol stack is a set of network protocol layers that work together to manage data communication across a network. Each layer in the stack handles a specific aspect of the communication process, ensuring that data is processed efficiently and correctly from the physical transmission to application-specific formatting.

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