Asus GigaX2124 - Manual (Page 121)

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Chapter 8 - Glossary
TTL Time To Live
A field in an IP packet that limits the life span of that packet.
Originally meant as a time duration, the TTL is usually
represented instead as a maximum hop count; each router
that receives a packet decrements this field by one. When
the TTL reaches zero, the packet is discarded.
twisted pair The ordinary copper telephone wiring long used by
telephone companies. It contains one or more wire pairs
twisted together to reduce inductance and noise. Each
telephone line uses one pair. In homes, it is most often
installed with two pairs. For Ethernet LANs, a higher grade
called Category 3 (CAT 3) is used for 10BASE-T networks,
and an even higher grade called Category 5 (CAT 5)
is used for 100BASE-T networks. See also 10BASE-T,
100BASE-T, Ethernet.
upstream The direction of data transmission from the user to the
Internet.
VLAN Virtual Local Area Network
WAN Wide Area Network
Any network spread over a large geographical area, such
as a country or continent. With respect to the SL-1000,
WAN refers to the Internet.
Web
browser
A software program that uses Hyper-Text Transfer Protocol
(HTTP) to download information from (and upload to) web
sites, and displays the information, which may consist of
text, graphic images, audio, or video, to the user. Web
browsers use Hyper-Text Transfer Protocol (HTTP).
Popular web browsers include Netscape Navigator and
Microsoft Internet Explorer. See also HTTP, web site,
WWW.