D-Link DES-3326SR Layer 3 Switch
Glossary
100BASE-FX:
100Mbp Ethernet implementation over fiber.
100BASE-TX:
100Mbps Ethernet implementation over Category 5 and Type 1 Twisted Pair cabling.
10BASE-T:
The IEEE 802.3 specification for Ethernet over Unshielded Twisted Pair (UTP) cabling.
ageing:
The automatic removal of dynamic entries from the Switch Database which have timed-out and are no
longer valid.
ATM:
Asynchronous Transfer Mode. A connection oriented transmission protocol based on fixed length cells
(packets). ATM is designed to carry a complete range of user traffic, including voice, data, and video signals.
bridge:
A device that interconnects local or remote networks no matter what higher level protocols are involved.
Bridges form a single logical network, centralizing network administration.
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.
edge port:
A configurable designation for RSTP operations. It defines a port that is directly connected to a
segment where a loop cannot exist. For example, a port connected to a server with a single Ethernet connection.
Edge ports transition to a forwarding state more quickly where RSTP is used.
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.
auto-negotiation:
A feature on a port that allows it to advertise its capabilities for speed, duplex, and flow control.
When connected to an end station that also supports auto-negotiation, the link can self-detect its optimum
operating setup.
backbone port
: A port that does not learn device addresses, and which receives all frames with an unknown
address. Backbone ports are normally used to connect the Switch to the backbone of your network. Note that
backbone ports were formerly known as designated downlink ports.
Backbone:
The part of a network used as the primary path for transporting traffic between network segments.
bandwidth:
Information capacity, measured in bits per second, that a channel can transmit. The bandwidth of
Ethernet is 10Mbps, the bandwidth of Fast Ethernet is 100Mbps.
BOOTP:
The BOOTP protocol allows you to automatically map an IP address to a given MAC address each time
a device is startesd. In addition, the protocol can assign the subnet mask and default gateway to a device.
broadcast:
A message sent to all destination devices on the network.
broadcast storm:
Multiple simultaneous broadcasts that typically absorb available network bandwidth and can
cause network failure.
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.
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.
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