SMC Networks 2512W-B FICHE, Руководство пользователя

Страница: 35 / 37

34
Fixed IP – (see Static IP)
Full-Duplex - Transmitting and receiving data simultaneously. In pure digital networks, this is achieved
with two pairs of wires. In analog networks, or digital networks using carriers, it is achieved by dividing
the bandwidth of the line into two frequencies, one for sending, one for receiving.
Hub - Central connection device for shared media in a star topology. It may add nothing to the trans-
mission (passive hub) or may contain electronics that regenerate signals to boost strength 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 sepa-
rated 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 ind i-
viduals 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 Tra nslation) 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 Instru-
ments 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.