Altigen AltiContact Manager Version 5.0A, Руководство администратора

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26-2 AltiContact Manager Administration Manual
A protocol stack is a collection of actual protocol layers used to establish a
connection across the network that allows dissimilar network devices to
exchange information.
SMTP/POP3
SMTP— Simple Mail Transfer Protocol. As seen by the client side of the
network, is an Internet email sending protocol software format.
POP3 —Post Office Protocol Version 3. As seen by the client side of the
network, POP3 is an Internet email retrieving protocol software format that
allows users to retrieve mail from its stored location.
IMAP4 —Internet Message Protocol Version 4. An enhanced version of
POP3 that, among other things, allows the user to view message headers of
each message before retrieving the complete message.
Network Address
A network address is an identifier for a node, station, or unit of equipment
in a network. There are many methods of accessing the network, such as
email or Hyper Text Transport Protocol (HTTP), Gopher, etc.
AltiContact Manager uses the email client/server access method.
A sample email client/server network address might look something like
the following example:
jsmith@earth.science.berkeley.edu
This address tells the routers and the Internet Service Provider (ISP) where
to deliver this message. This is an extended address. The address is read
from the right to the left:
edu = first level domain
berkeley = second level domain
science = third level domain
earth = fourth level domain
@ = at
jsmith = user name
Or it might be as simple (and short) as:
altigen.com
com =
first level domain name
altigen = second level domain name