D-Link dgs-1024d/f2a Инструкция по эксплуатации онлайн [32/33] 151918

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). Characterized 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.

MDIX – Medium Dependent Interface Cross-over. An Ethernet port connection

where the internal transmit and receive lines are crossed.

MIB – Management Information Base. Stores a device’s management

characteristics and parameters. MIBs are used by the Simple Network Management

Protocol (SNMP) to contain attributes of their managed systems. The Switch

contains its own internal MIB.

Multicast – Single packets copied to a specific subset of network addresses. These

addresses are specified in the destination-address field of the packet.

Protocol – A set of rules for communication between devices on a network. The

rules dictate format, timing, sequencing, and error control.