In information technology, a network is a series of points or nodes interconnected by
communication paths. Networks can interconnect with other networks and contain
sub networks.
NTP
NTP (Network Time Protocol) is a protocol designed to synchronize the clocks of
computers over a network.
POP3
POP3 is a client/server protocol in which e-mail is received and held for you by your
Internet server. POP can be thought of as a "store-and-forward" service. POP and
IMAP deal with the receiving of email, and SMTP is a protocol for simply transferring
email across the Internet.
Port number
In programming, a port (noun) is a "logical connection place" and specifically, using
the Internet's protocol, TCP/IP, the way a client program specifies a particular server
program on a computer in a network. For the HTTP service, port 80 is defined as a
default and it does not have to be specified in the Uniform Resource Locator (URL).
PPPOE
PPPOE (Point-to-Point Protocol over Ethernet) is a specification for connecting
multiple computer users on an Ethernet local area network to a remote site through
common customer premises equipment, which is the telephone company's term for a
modem and similar devices. PPPOE can be used to have an office or building-full of
users share a common Digital Subscriber Line (DSL), cable modem, or wireless
connection to the Internet. PPPOE combines the Point-to-Point Protocol (PPP),
commonly used in dialup connections, with the Ethernet protocol, which supports
multiple users in a local area network. The PPP protocol information is encapsulated
within an Ethernet frame.
Proxy Server
A proxy server is associated with or part of a gateway server that separates the
enterprise network from the outside network and a firewall server that protects the
enterprise network from outside intrusion. To the user, the proxy server is invisible.
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.
Subnet Mask
65
