What is internet

| 1 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

10BaseT

10 Megabit per second baseband Ethernet specification using two pairs of twisted-pair cabling (Category 3, 4 or 5): one pair for transmitting data and the other for receiving data. 10BaseT has a distinct limit of approximately 100 meters per segment.

100BaseT

100 Mebabit per second baseband Fast Ethernet specification using UTP wiring. Like the 10BaseT technology on which it is based, 100BaseT sends link pulses over the network segment when no traffic is present. However, these link pulses contain more information than those used in 10BaseT.

A Record

An A record is part of the zone file. It is used to point Internet traffic to an IP address. For example, you can use an “A record” to designate abc.yourdomain.com to send traffic to your web site at IP address 209.15.32.135. You can also designate xyz.yourdomain.com to go to a separate IP address.

ADN

(Advanced Digital Network) — Usually refers to a 56 Kilobit per second leased-line

ADSL

(Asymmetric Digital Subscriber Line) — A method for moving data over regular phone lines. An ADSL circuit is much faster than a regular phone connection, and the wires coming into the subscriber’s premises are the same (copper) wires used for regular phone service. An ADSL circuit must be configured to connect two specific locations, similar to a leased line.A commonly discussed configuration of ADSL would allow a subscriber to receive data (download) at speeds of up to 1.544 Megabits per second, and to send (upload) data at speeds of 128 kilobits per second. Thus the ‘Asymmetric’ part of the acronym.

Another commonly discussed configuration would be symmetrical: 384 kilobits per second in both directions. In theory ADSL allows download speeds of up to 9 megabits per second and upload speeds of up to 640 kilobits per second.

ADSL is often discussed as an alternative to ISDN, allowing higher speeds in cases where the connection is always to the same place. See Also: bit , bps , ISDN

Anonymous FTP

Anonymous File Transfer Protocol allows the public to log into an FTP server with a common login (usually “ftp” or “anonymous” and any password (usually the person’s e-mail address is used as the password). Anonymous FTP is beneficial for the distribution of large files to the public, avoiding the need to assign large numbers of login and password combinations for FTP access. See Also: FTP

Applet

A small Java program that can be embedded in an HTML page. Applets differ from full-fledged Java applications in that they are not allowed to access certain resources on the local computer, such as files and serial devices (modems, printers, etc.), and are prohibited from communicating with most other computers across a network. The current rule is that an applet can only make an Internet connection to the computer from which the applet was sent. See Also: HTML , Java

Archie

A tool (software) for finding files stored on anonymous FTP sites. You need to know the exact file name or a substring of it.

ARPANet

(Advanced Research Projects Agency Network) — The precursor to the Internet. Landmark packet-switching network established in 1969 by the US Department of Defense as an experiment in wide-area-networking that would survive a nuclear war. See Also: Internet

ATM

ATM — Asynchronous Transfer Mode. International standard for cell relay in which multiple service types (such as voice, video, or data) are conveyed in fixed-length (53-byte) cells. Fixed-length cells allow cell processing to occur in hardware, thereby reducing transit delays. ATM is designed to take advantage of high-speed transmission media such as E3, SONET, and T3.

ASCII

(American Standard Code for Information Interchange) — This is the de facto world-wide standard for the code numbers used by computers to represent all the upper and lower-case Latin letters, numbers, punctuation, etc. There are 128 standard ASCII codes each of which can be represented by a 7 digit binary number: 0000000 through 1111111, plus parity.

Backbone

A high-speed line or series of connections that forms a major pathway within a network. The term is relative, as a backbone in a small network will likely be much smaller than many non-backbone lines in a large network. See Also: Network

Bandwidth

The difference between the highest and lowest frequencies available for network signals. The term is also used to describe the rated throughput capacity of a given network medium or protocol. In short, bandwidth is a loose term used to describe the throughput capacity (measured in Kilobits or Megabits per second) of a specific circuit.
See Also:

Comments are closed.