3Com SuperStack 3 3812 Implementation Manual page 99

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Digital Certificate Digital Certificates are blocks of data that are used to identify users and
systems and encrypt their data. Digital Certificates used by SSL adhere
to the X.509 standard.
DNS Domain Name System. This system maps a numerical Internet Protocol
(IP) address to a more meaningful and easy-to-remember name. When
you need to access another device on your network, you enter the
name of the device, instead of its IP address.
endstation A computer, printer or server that is connected to a network.
Ethernet A LAN specification developed jointly by Xerox, Intel and Digital
Equipment Corporation. Ethernet networks use CSMA/CD to transmit
packets at a rate of 10 Mbps over a variety of cables.
Ethernet address See MAC address.
Fast Ethernet An Ethernet system that is designed to operate at 100Mbps.
forwarding The process of sending a packet toward its destination using a
networking device.
Forwarding Database See Switch Database.
filtering The process of screening a packet for certain characteristics, such as
source address, destination address, or protocol. Filtering is used to
determine whether traffic is to be forwarded, and can also prevent
unauthorized access to a network or network devices.
flow control A mechanism that prevents packet loss during periods of congestion on
the network. Packet loss is caused when devices send traffic to an
already overloaded port on a Switch. Flow control prevents packet loss
by inhibiting devices from generating more traffic until the period of
congestion ends.
FTP File Transfer Protocol. A protocol based on TCP/IP for reliable file
transfer.
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.
gateway See router.
Gigabit Ethernet IEEE standard 802.3z for 1000 Mbps Ethernet; it is compatible with
existing 10/100 Mbps Ethernet standards.