KTI KGS-3120, Руководство по эксплуатации

Страница: 219 / 221

-219-
console port: The port on the Switch accepting a terminal or modem connector. It changes the
parallel arrangement of data within computers to the serial form used on data transmission links. This
port is most often used for dedicated local management.
CSMA/CD: Channel access method used by Ethernet and IEEE 802.3 standards in which devices
transmit only after finding the data channel clear for some period of time. When two devices transmit
simultaneously, a collision occurs and the colliding devices delay their retransmissions for a random
amount of time.
data center switching: The point of aggregation within a corporate network where a switch provides
high-performance access to server farms, a high-speed backbone connection and a control point for
network management and security.
Ethernet: A LAN specification developed jointly by Xerox, Intel and Digital Equipment Corporation.
Ethernet networks operate at 10Mbps using CSMA/CD to run over cabling.
Fast Ethernet: 100Mbps technology based on the Ethernet/CD network access method.
Flow Control: (IEEE 802.3z) A means of holding packets back at the transmit port of the connected
end station. Prevents packet loss at a congested switch port.
forwarding: The process of sending a packet toward its destination by an internetworking device.
full duplex: A system that allows packets to be transmitted and received at the same time and, in
effect, doubles the potential throughput of a link.
half duplex: A system that allows packets to be transmitted and received, but not at the same time.
Contrast with full duplex.
IP address: Internet Protocol address. A unique identifier for a device attached to a network using
TCP/IP. The address is written as four octets separated with full-stops (periods), and is made up of a
network section, an optional subnet section and a host section.
IPX: Internetwork Packet Exchange. A protocol allowing communication in a NetWare network.
LAN - Local Area Network: A network of connected computing resources (such as PCs, printers,
servers) covering a relatively small geographic area (usually not larger than a floor or building). Char-
acterized by high data rates and low error rates.
latency: The delay between the time a device receives a packet and the time the packet is forwarded
out of the destination port.
line speed: See baud rate.
main port: The port in a resilient link that carries data traffic in normal operating conditions.
MDI - Medium Dependent Interface: An Ethernet port connection where the transmitter of one
device is connected to the receiver of another device.
MDI-X - Medium Dependent Interface Cross-over: An Ethernet port connection where the
internal transmit and receive lines are crossed.