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User’s Manual 65
PSTN
- Public Switched Telephone Network. The telephone line network which
is used when you make an analog telephone call.
RFC: Request for Comments. One of a series of documents defining a pro-
posed protocol and requesting standardization. To retrieve an RFC, go to http://
www.ietf.org/rfc/rfcNNNN.txt where NNNN is the number of the target RFC.
SMTP: Simple Mail Transfer Protocol. Standard protocol for transferring elec-
tronic mail messages from one mail server to another. SMTP specifies how mail
systems interact and the format of control messages.
TCP/IP: Transmission Control Protocol/Internet Protocol. A standard set of pro-
tocols that govern the Internet. The TCP portion ensures that data is transmitted
correctly between two computers. The data transmitted is split up into small por-
tions called data packets. Each packet is confirmed as received before the next
packet is sent. The IP portion of controls how these data packets are moved
from one point to another. Each computer on the Internet has a unique IP ad-
dress. The data packets are moved from the source computer to the destination
computer through many different computers based on the IP address, similar to
the way U.S. Mail is sent and delivered based on the address and ZIP Code.
Telnet: A program that allows a user to log in to a computer from a remote loca-
tion. It allows a user at one site to transparently interact with, or pass through to,
a remote system at another site, while appearing as a local terminal.
UDP
: User Datagram Port. An alternative protocol to TCP and also used with IP.
Typically used while accessing DNS servers and network management pro-
grams.
URL:
Uniform Resource Locator. Compact string representation for a resource
available via the Internet. URLs are written as:
<scheme>:<scheme-specific-part>
where a scheme may be a protocol or some other method of accessing data (e.
g. "HTTP", "FTP", "mailto" or "file") and the
scheme-specific-part
may be a Do-
main Name and path, IP address or some other information. Please refer to
RFC 1738 for more information.
WAN:
Wide Area Network. A linked network of remote computers or LANs. Usu-
ally owned by the same organization.
Web Browser: An application program used to access HTML files. It interprets
the HTML file and presents the file in a graphical format. Examples include Net-
scape Navigator, MS Internet Explorer, etc.