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GigaX2024/2048 L2 Managed Switch User Manual
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.
Web page
A web site file typically containing text, graphics and
hyperlinks (cross-references) to the other pages on that web
site, as well as to pages on other web sites. When a user
accesses a web site, the first page that is displayed is called
the home page. See also hyperlink, web site.
Web site
A computer on the Internet that distributes information to (and
gets information from) remote users through web browsers.
A web site typically consists of web pages that contain text,
graphics, and hyperlinks. See also hyperlink, web page.
WWW
World Wide Web
Also called (the) Web. Collective term for all web sites
anywhere in the world that can be accessed via the Internet
