Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)

LOOK UP ANOTHER TERM


BPDU

(Bridge Protocol Data Unit) A spanning tree protocol (STP) message unit that describes the attributes of a switch port such as its MAC address, priority and cost to reach. BPDUs enable switches that participate in a spanning tree protocol to gather information about each other. See spanning tree protocol.



spanning tree protocol

An algorithm that runs in network bridges and switches to prevent loops, in which packets keep going around in circles. In a small network with one or two switches, the spanning tree protocol (STP) has little value; however, in a large network where many switches are connected to each other via bridges, redundant paths can cause loops.

The algorithm creates a hierarchical "tree" that "spans" the entire network. It determines all redundant paths and makes only one of them active at any given time. In addition, if there are redundant paths and one of them fails, it allows the other to take over. The spanning tree protocol is part of the IEEE 802.1 network management standard. See IEEE 802 and BPDU.



Personal Use Only

Before/After Your Search Term
BeforeAfter
boundary routerBPEL
Boundary RoutingBPEL4WS
boundary scanBPG
Bourne shellbpi
boxBPL
BOYDBPM
Boyer-Moore algorithmBPM suite
bozo filterBPM system
BPBPML
BPD fileBPMS

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
Audio/VideoGraphics
MainframesSecurity
ProgrammingHealthcare IT
System design