Corinex Global ADSL2+ - Manual (Page 128)

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Appendices
Corinex ADSL2+ Wireless Gateway G
cable has a maximum throughput of 100 Mbps and is usually utilized for 100BaseTX
networks.
CAT 5e - The additional cabling performance parameters of return loss and farend
crosstalk (FEXT) specified for 1000BASE-T and not specified for 10BASE-T and
100BASE-TX are related to differences in the signaling implementation. 10BASE-T
and 100BASE-TX signaling is unidirectional—signals are transmitted in one direc-
tion on a single wire pair. In contrast, Gigabit Ethernet is bi-directional—signals are
transmitted simultaneously in both directions on the same wire pair; that is, both
the transmit and receive pair occupy the same wire pair.
CPU (Central Processing Unit) - The computing part of the computer. Also
called the “processor,” it is made up of the control unit and ALU.
Daisy Chain - Connected in series, one after the other. Transmitted signals go to
the first device, then to the second, and so on.
Database - A database is a collection of data that is organized so that its contents
can easily be accessed, managed, and updated.
Data Packet - One frame in a packet-switched message. Most data communica-
tions is based on dividing the transmitted message into packets. For example, an
Ethernet packet can be from 64 to 1518 bytes in length.
Default Gateway - The routing device used to forward all traffic that is not
addressed to a station within the local subnet.
Demodulation - Opposite of modulation; the process of retrieving data from a
modulated carrier wave.
DHCP (Dynamic Host Configuration Protocol) - A protocol that lets network
administrators centrally manage and automate the assignment of Internet Protocol
(IP) addresses in an organization’s network. Using the Internet’s set of protocol
(TCP/IP), each machine that can connect to the Internet needs a unique IP address.
When an organization sets up its computer users with a connection to the Internet,
an IP address must be assigned to each machine. Without DHCP, the IP address
must be entered manually at each computer and, if computers move to another
location in another part of the network, a new IP address must be entered. DHCP
lets a network administrator supervise and distribute IP addresses from a central
point and automatically sends a new IP address when a computer is plugged into a
different place in the network. DHCP uses the concept of a “lease” or amount of
time that a given IP address will be valid for a computer. The lease time can vary