Chap-20 SMTP, POP, IMAP - TCP/IP Protocol Suite 1 Chapter...

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Unformatted text preview: TCP/IP Protocol Suite 1 Chapter 20 Chapter 20 Upon completion you will be able to: Electronic Mail: Electronic Mail: SMTP, POP, and IMAP 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 2 20.1 ARCHITECTURE To explain the architecture of email, we give four scenarios. We begin To explain the architecture of email, we give four scenarios. We begin with the simplest situation and add complexity as we proceed. The fourth with the simplest situation and add complexity as we proceed. The fourth scenario is the most common in the exchange of email. scenario is the most common in the exchange of email. The topics discussed in this section include: The topics discussed in this section include: First Scenario First Scenario Second Scenario Second Scenario Third Scenario Third Scenario Fourth Scenario Fourth Scenario TCP/IP Protocol Suite 3 Figure 20.1 First scenario TCP/IP Protocol Suite 4 When the sender and the receiver of an email are on the same system, we need only two user agents. Note: Note: TCP/IP Protocol Suite 5 Figure 20.2 Second scenario TCP/IP Protocol Suite 6 When the sender and the receiver of an email are on different systems, we need two UAs and a pair of MTAs (client and server). Note: Note: TCP/IP Protocol Suite 7 Figure 20.3 Third scenario TCP/IP Protocol Suite 8 When the sender is connected to the mail server via a LAN or a WAN, we need two UAs and two pairs of MTAs (client and server)....
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This note was uploaded on 04/26/2010 for the course CSE CS501 taught by Professor Dmathur during the Winter '10 term at National Institute of Technology, Calicut.

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Chap-20 SMTP, POP, IMAP - TCP/IP Protocol Suite 1 Chapter...

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