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388 Glossary
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Auto-negotiation
Allows 10/100 Mpbs or 10/100/1000 Mbps Ethernet ports to establish for the following features:
• Duplex/ Half Duplex mode
•Flow Control
•Speed
B
Back Pressure
A mechanism used with Half Duplex mode that enables a port not to receive a message.
Backplane
The main BUS that carries information in the switch module.
Backup Configuration Files
Contains a backup copy of the switch module configuration. The Backup file changes when the Running
Configuration file or the Startup configuration file is copied to the Backup file.
Bandwidth
Bandwidth specifies the amount of data that can be transmitted in a fixed amount of time. For digital switch
modules, bandwidth is defined in Bits per Second (bps) or Bytes per Second.
Bandwidth Assignments
The amount of bandwidth assigned to a specific application, user, or interface.
Baud
The number of signaling elements transmitted each second.
Best Effort
Traffic is assigned to the lowest priority queue, and packet delivery is not guaranteed.
Boot Version
The boot version.
BootP
Bootstrap Protocol.
Enables a workstation to discover its IP address, an IP address of a BootP server on a network,
or a configuration file loaded into the boot of a switch module.
BPDU
Bridge Protocol Data Unit
. Provide bridging information in a message format. BPDUs are sent across switch
module information with in Spanning Tree configuration. BPDU packets contain information on ports,
addresses, priorities, and forwarding costs.