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as well as monitor activity (active/intelligent hub). Hubs may be added to bus topologies; for
example, a hub can turn an Ethernet network into a star topology to improve troubleshooting.
IP Address - IP stands for Internet Protocol. An IP address consists of a series of four numbers
separated by periods, that identifies an single, unique Internet computer host. Example:
192.34.45.8.
ISP - Internet Service Provider. An ISP is a business that provides connectivity to the Internet for
individuals and other businesses or organizations.
LAN - A communications network that serves users within a confined geographical area. It is
made up of servers, workstations, a network operating system and a communications link.
Servers are high-speed machines that hold programs and data shared by network users. The
workstations (clients) are the users' personal computers, which perform stand-alone processing
and access the network servers as required.
Diskless and floppy-only workstations are sometimes used, which retrieve all software and data
from the server. Increasingly, "thin client" network computers (NCs) and Windows terminals are
also used. A printer can be attached locally to a workstation or to a server and be shared by
network users. Small LANs can allow certain workstations to function as a server, allowing users
access to data on another user's machine. These peer-to-peer networks are often simpler to
install and manage, but dedicated servers provide better performance and can handle higher
transaction volume. Multiple servers are used in large networks.
MAC Address - MAC (Media Access Control) A MAC address is the hardware address of a device
connected to a network.
MDI / MDI-X - Medium Dependent Interface - Also called an "uplink port," it is a port on a
network hub or switch used to connect to other hubs or switches without requiring a crossover
cable. The MDI port does not cross the transmit and receive lines, which is done by the regular
ports (MDI-X ports) that connect to end stations. The MDI port connects to the MDI-X port on
the other device. There are typically one or two ports on a device that can be toggled between
MDI (not crossed) and MDI-X (crossed).
Medium Dependent Interface – X (crossed) - A port on a network hub or switch that crosses the
transmit lines coming in to the receive lines going out.
NAT – (Network Address Translation) This process allows all of the computers on your home
network to use one IP address. The NAT capability of the Barricade, allows you to access the
Internet from any computer on your home network without having to purchase more IP
addresses from your ISP. Network Address Translation can be used to give multiple users access
to the Internet with a single user account, or to map the local address for an IP server (such as
Web or FTP) to a public address. This secures your network from direct attack by hackers, and
provides more flexible management by allowing you to change internal IP addresses without
affecting outside access to your network. NAT must be enabled to provide multi-user access to
the Internet or to use the Virtual Server function.
Packet Binary Convulational Code(tm) (PBCC) - A modulation technique developed by Texas
Instruments Inc. (TI) that offers data rates of up to 22Mbit/s and is fully backward compatible
with existing 802.11b wireless networks.
PCI - Peripheral Component Interconnect - Local bus for PCs from Intel that provides a high-
speed data path between the CPU and up to 10 peripherals (video, disk, network, etc.). The PCI
bus runs at 33MHz, supports 32-bit and 64-bit data paths, and bus mastering.
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