TAILIEUCHUNG - Lecture TCP-IP protocol suite (3/e): Chapter 20 - Behrouz Forouzan

Chapter 20 - Electronic mail: SMTP, POP, and IMAP. In this chapter, we first study the general architecture of an e-mail system including the three main components: user agent, message transfer agent, and message access agent. We then describe the protocols that implement these components. | Chapter 20 Upon completion you will be able to: Electronic Mail: SMTP, POP, and IMAP Understand four configurations of email architecture Understand the functions and formats of a user agent Understand MIME and its capabilities and data types Understand the functions and commands of an MTA Understand the function of POP3 and IMAP4 Objectives TCP/IP Protocol Suite ARCHITECTURE To explain the architecture of email, we give four scenarios. We begin with the simplest situation and add complexity as we proceed. The fourth scenario is the most common in the exchange of email. The topics discussed in this section include: First Scenario Second Scenario Third Scenario Fourth Scenario TCP/IP Protocol Suite Figure First scenario TCP/IP Protocol Suite When the sender and the receiver of an email are on the same system, we need only two user agents. Note: TCP/IP Protocol Suite Figure Second scenario TCP/IP Protocol Suite When the sender and the receiver of an

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• TCP IP protocol suite
• Lecture TCP IP protocol suite
• Network layer
• Internet protoocl
• Electronic mail
• Email architecture
• Email Accounts
• Hacking Email Accounts
• cyberspace
• national security
• Wifi hack tool
• Gmail inbox
• system architecture
• network security protection
• Business Edition
• provides multiple
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• borne threats