Flashcards
SMTP, POP3, IMAP
Cards in this deck (34)
- 1this is a textual protocol, used in client-to-server and server-to-client delivery of email traffic.SMTP
Simple Mail Transport Protocol - 2T or F: SMTP is not secureTrue
- 3SMTP commands generated from by whom to who?SMTP commands are generated by the sending computer and sent to the SMTP server
- 4What are the 5 commands for SMTP?HELO/EHLO
MAIL
RCPT
DATA
EXPN - 5SMTP: system you're onHELO/EHLO
- 6SMTP: any email address you wantMAIL FROM
- 7SMTP: Legitimate mail box on the serverRCPT TO
- 8SMTP: Body of the emailDATA
- 9When an SMTP relay makes final delivery, it inserts a _______ _____ line at the beginning of the mail data.return path
- 10SMTP: verify whether the mail box you're trying to sent to is on the serverVRFY
- 11for the VRFY command in SMTP what is code mean when send from the SMTP Server? 250 =good to go
- 12for the VRFY command in SMTP what is code mean when send from the SMTP Server? 251 =error:
User not local; will forward - 13for the VRFY command in SMTP what is code mean when send from the SMTP Server? 550 =error:
String does not match anything - 14for the VRFY command in SMTP what is code mean when send from the SMTP Server? 551 =error:
User not local; please try - 15SMTP Command: Expand and tells you which mailboxes make up a distro listEXPN
- 16NOOP = ?KEEP our LINE connected
- 17Wire shark for SMTP Show all packets that start an email messagesmtp.req.command == "DATA"
- 18This protocol allows a user's workstation to access mail from a mail server. -Requires Login -not secure -expected that mail will be posted from the workstation to server via SMTPPost Office Protocol Version 3
POP3 - 19POP3 uses what PORT?TCP 110
- 20T or F: allows users to ID themselves, retrieve mail, and manipulate mail within their mailboxTrue
- 21What are the 2 Possible Responses from the Server when dealing with POP3?+OK
-ERR - 22In POP3 this command is used to start reading specified message.RETR
- 23In POP3 this command requests the servers state it status. Response if +OK has the # of messages followed by the # of bytes or octets of the mailbox.STAT
- 24Wireshark for POP3: show all POP communications packetsPOP
- 25This unsecured protocol allows client to access mail stored on a remote server.IMAP
Internet Message Access Protocol - 26What port does IMAP use?TCP 143
- 27In IMAP each time the client sends a command, what is used with every command.A tag that is unique for that particular session and that increments. for example:
"a0001" then "a0002" - 28T or F: IMAP commands are broken up into categories depending on the state of the connection.TRUE
- 29What doe this represent for IMAP? -Any State Commands -Not Authenticated Commands -Authenticated State -Selected StateCategories of commands
- 30In IMAP which command permanently removes all the messages marked for deletion and returns server to authenticated state.CLOSE
- 31In IMAP which command Permanently removes all the messages marked for deletionEXPUNGE
- 32In IMAP which command retrieves the message of the current mailbox for text specified.FETCH
- 33T or F: IMAP ----- FETCH POP3 ----- RETRTRUE
- 34T or F: In IMAP each message is preceded with a tag.True
Information
- Description
- college Protocol Analysis (Application Layer Protocols) Flashcards on SMTP, POP3, IMAP, created by jeriel.juarbe2031 on 30/09/2014.
- Created by
- jeriel.juarbe2031 · Sep 2014
- Updated
- Feb 19, 2016
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