3Com 3C16405, User Manual

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LOSSARY
10BASE-T The IEEE 802.3 specification for Ethernet over Twisted Pair (TP) cabling.
active segment
switch
In a stack with multiple PS Hub 50 units, only one segment switch can
be active (called the active segment switch), the other segment
switches are disabled. See
segment switch .
ageing The process of removing unused learnt (non-permanent) addresses from
the switch database.
bandwidth Information capacity, measured in bits per second (bps), that a channel
can transmit. The bandwidth of Ethernet is 10Mbps.
baud rate
The switching speed of a line. Also known as line speed.
BOOTP The BOOTP protocol allows you to automatically map an IP address to a
given MAC address each time a device is started. In addition, the
protocol can assign the subnet mask and default gateway to a device.
bridge mode
One of the segment switch’s operating modes which conforms to the
IEEE 802.1d specification. Refers to the process of forwarding all
packets with unknown addresses to all of the segments (except the
segment that the packet was received from).
broadcast
A message sent to all destination devices on the network.
broadcast storm Multiple simultaneous broadcasts that typically absorb available
bandwidth and can cause network failure.
cascaded segments The segments that run up and down the stack by the cascade cables,
to which the PS Hubs’ internal segments connect (or are isolated from).
console port The port on the PS Hub 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.