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Prestige 100L IDSL Router
Glossary E
(IP) datagrams, but the messages are processed by the TCP/IP software and are not
directly apparent to the application user.
IDSL
IDSL is a technical innovation from Ascend and the first of a series of DSL product
offerings from Ascend. It stands for ISDN Digital Subscriber Line (IDSL). IDSL uses
the 2B1Q line coding standard for ISDN BRI circuits. Used for data-only applications,
IDSL operates at 128 Kbps for up to 18,000 feet.
Inside Wiring
Wiring that is done from the point of demarcation to the jack in the wall where the line
terminates.
internet
(Lower case i) Any time you connect 2 or more networks together, you have an
internet.
Internet
(Upper case I) The vast collection of inter-connected networks that all use the TCP/IP
protocols and that evolved from the ARPANET of the late 60’s and early 70’s.
Intranet
A private network inside a company or organization that uses the same kinds of
software that you would find on the public Internet, but that is only for internal use.
IP
Internet Protocol. The IP (currently IP version 4, or IPv4), is the underlying protocol
for routing packets on the Internet and other TCP/IP-based networks.
IPCP (PPP)
IP Control Protocol allows changes to IP parameters such as the IP address.
IPX
Internetwork Packet eXchange The native NetWare internetworking protocol is IPX
(Internetwork Packet Exchange). Like IP (Internet Protocol), IPX is an internetworking
protocol that provides datagram services.
IRC Internet Relay Chat. IRC was developed in the late 1980s as a way for multiple users
on a system to “chat” over the network. Today IRC is a very popular way to “talk” in
real time with other people on the Internet. However, IRC is also one avenue hackers
use to get information from you about your system and your company. Moreover, IRC
sessions are prone to numerous attacks that while not dangerous can cause your
system to crash.
ISP
Internet Service Providers provide connections into the Internet for home users and
businesses. There are local, regional, national, and global ISPs. You can think of
local ISPs as the gatekeepers into the Internet.
Jack Type
Different types of jacks (RJ11, RJ45, or RJ48) can be used for an ISDN line. The
RJ11 is the most common in the world and is most often used for analog phones,
modems, and fax machines. RJ48 and RJ45 are essentially the same, as they both
have the same 8-pin configuration. An RJ11 jack can fit into an RJ45/RJ48
connector, however, an RJ45/RJ48 cannot fit into an RJ11 connector.
LAN
Local Area Network is a shared communication system to which many computers are
attached. A LAN, as its name implies, is limited to a local area. This has to do more
with the electrical characteristics of the medium than the fact that many early LANs
were designed for departments, although the latter accurately describes a LAN as
well. LANs have different topologies, the most common being the linear bus and the
star configuration.