I love this group, they really drilled us at the art is Beautiful Concert in Federal University of Bayelsa.
you can download with the link below
Thursday 16 July 2015
Friday 4 January 2013
The Back View of a System Unit Showing its lablled ports
The Back View of a System Unit Showing its lablled ports.
Saturday 24 November 2012
IMAP
IMAP (Internet Message Access Protocol) is a
standard protocol for accessing e-mail from your
local server. IMAP (the latest version is IMAP
Version 4) is a client/server protocol in which e-
mail is received and held for you by your Internet
server. You (or your e-mail client) can view just
the heading and the sender of the letter and then
decide whether to download the mail. You can
also create and manipulate multiple folders or
mailboxes on the server, delete messages, or
search for certain parts or an entire note. IMAP
requires continual access to the server during the
time that you are working with your mail.
A less sophisticated protocol is Post Office Protocol
3 ( POP3). With POP3, your mail is saved for you in
a single mailbox on the server. When you read
your mail, all of it is immediately downloaded to
your computer and, except when previously
arranged, no longer maintained on the server.
IMAP can be thought of as a remote file server.
POP3 can be thought of as a "store-and-forward"
service.
POP3 and IMAP deal with the receiving of e-mail
from your local server and are not to be confused
with Simple Mail Transfer Protocol ( SMTP), a
protocol used for exchanging e-mail between
points on the Internet. Typically, SMTP is used for
sending only and POP3 or IMAP are used to read
e-mail.
standard protocol for accessing e-mail from your
local server. IMAP (the latest version is IMAP
Version 4) is a client/server protocol in which e-
mail is received and held for you by your Internet
server. You (or your e-mail client) can view just
the heading and the sender of the letter and then
decide whether to download the mail. You can
also create and manipulate multiple folders or
mailboxes on the server, delete messages, or
search for certain parts or an entire note. IMAP
requires continual access to the server during the
time that you are working with your mail.
A less sophisticated protocol is Post Office Protocol
3 ( POP3). With POP3, your mail is saved for you in
a single mailbox on the server. When you read
your mail, all of it is immediately downloaded to
your computer and, except when previously
arranged, no longer maintained on the server.
IMAP can be thought of as a remote file server.
POP3 can be thought of as a "store-and-forward"
service.
POP3 and IMAP deal with the receiving of e-mail
from your local server and are not to be confused
with Simple Mail Transfer Protocol ( SMTP), a
protocol used for exchanging e-mail between
points on the Internet. Typically, SMTP is used for
sending only and POP3 or IMAP are used to read
e-mail.
SMTP
SMTP (Simple Mail Transfer Protocol) is a TCP/IP
protocol used in sending and receiving e-mail.
However, since it is limited in its ability to queue
messages at the receiving end, it is usually used
with one of two other protocols, POP3 or IMAP,
that let the user save messages in a server
mailbox and download them periodically from the
server. In other words, users typically use a
program that uses SMTP for sending e-mail and
either POP3 or IMAP for receiving e-mail. On Unix-
based systems, sendmail is the most widely-used
SMTP server for e-mail. A commercial package,
Sendmail, includes a POP3 server. Microsoft
Exchange includes an SMTP server and can also
be set up to include POP3 support.
SMTP usually is implemented to operate over
Internet port 25. An alternative to SMTP that is
widely used in Europe is X.400. Many mail servers
now support Extended Simple Mail Transfer
Protocol ( ESMTP), which allows multimedia files to
be delivered as e-mail.
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