2022-12-19T18:05:17+03:00[Europe/Moscow] en true <p>Email is</p>, <p>Email uses</p>, <p>Client side</p>, <p>Server side</p>, <p>Three major components</p>, <p>User agent aka</p>, <p>User agent function</p>, <p>User agent function</p>, <p>Mailbox function</p>, <p>Simple Mail Transfer Protocol (SMTP) characteristic </p>, <p>HTTP and SMTP uses</p>, <p>HTTP pull protocol is</p>, <p>SMTP push protocol is</p>, <p>When HTTP send messages</p>, <p>When SMTP send messages</p>, <p>SMTP header lines</p>, <p>SMTP body</p>, <p>Mail access protocol</p>, <p>Mail access protocol examples</p>, <p>POP</p> flashcards
NetComms Chapter 2 - Email and below

NetComms Chapter 2 - Email and below

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  • Email is

    asynchronous communication medium

  • Email uses

    TCP, port 25, client-server method

  • Client side

    executes on sender's mail server

  • Server side

    executes on the recipient's mail server

  • Three major components

    user agents, mail server, SMTP protocol

  • User agent aka

    mail reader

  • User agent function

    composing, reading, editing mail messages

  • User agent function

    Outlook, Apple mail

  • Mailbox function

    contains incoming message for user

  • Simple Mail Transfer Protocol (SMTP) characteristic

    - TCP for reliable data transfer

    - port 25

    - direct transfer

    - three phases of transfer

    - command/response interaction

    - messages in 7-bit ASCII

    - uses persistent connection

  • HTTP and SMTP uses

    persistent connection

  • HTTP pull protocol is

    client get information from server

  • SMTP push protocol is

    server send file to receiving mail server

  • When HTTP send messages

    it places all message object in one message

  • When SMTP send messages

    it separate multiple object in multipart message

  • SMTP header lines

    To:

    From:

    Subject:

  • SMTP body

    the message

  • Mail access protocol

    transfer messages from mail server to local pc

  • Mail access protocol examples

    POP, IMAP, HTTP

  • POP

    Post Office Protocol [RFC 1939]: authorization, download