Appendix
A-4
8. E-mail Address
The address of the user with login account for the specific machine connected via the Internet.
Usually user’s ID @ domain name (machine name) is assigned. In other words, it will be like
[email protected], where @ is called as ‘at’ displayed with shift+2 pressed on the keyboard.
The letters at the back of @ are for the domain name of specific company (school, institute,..)
connected with the Internet, and the letters in front of @ are for the user ID registered in the
machine. The last letters of the domain name are for the highest level. USA generally uses the
following abbreviation as specified below, and Korea uses .kr to stand for Korea. .com : usually
for companies) / .edu : usually for educational organizations such as universities. / .ac(academy)
is mostly used in Korea / .gov : for governmental organizations. For example, nasa.gov is for
NASA (government) / .mil : military related sites. For example, af.mil is for USA air force
(military)/ .org : private organizations / .au : Australia / .uk : the United Kingdom / .ca : Canada
/ .kr : Korea / .jp : Japan / .fr : France / .tw : Taiwan, etc.
9. Ethernet
A representative LAN connection system (IEEE 802.3) developed by Xerox, Intel and DEC of
America which can send about 10Mbps and use the packet of 1.5kB. Since Ethernet can allow
various types of computers to be connected as one via the network, it has been called a pronoun
of LAN as a universal standard with various products available, not limited to some specific
companies.
10. FTP (File Transfer Protocol)
An application program used to transfer files between computers among application programs
providing TCP/IP protocol. If an account is allowed to the computer to log in, fast log in the
computer is available wherever the computer is so to copy files.
11. Gateway
Software/Hardware used to translate for two different protocols to work together, which is
equivalent to the gateway necessary to exchange information with the different system.
12. Header
Part of the packet including self-station Number, correspondent station Number and error
checking area.
13. HTML
Hypertext Markup Language, standard language of WWW. In other words, it is a language
system to prepare Hypertext documents. The document made of HTML can be viewed through
the web browser
14. HTTP
Hypertext Transfer Protocol, standard protocol of WWW. It is a protocol supporting the hypermedia
system.
15. ICMP (Internet Control Message Protocol)
An extended protocol of IP address used to create error messages and test packets to control
the Internet.
16. IP (Internet Protocol)
Protocol of network layers for the Internet
