( < bridge protocol data unit, "sillaprotokolli andmeüksus")

olemus
sillajuhtimise andmekaader, protokolli STP teostuse komponent, mida saadetakse regulaarselt paarisekundilise intervalliga
= a spanning tree protocol (STP) message unit that describes the attributes of a switch port

liigid
- konfiguratsiooniteave
- topoloogia muutuse teavitus
- topoloogia muutuse kviteerimine

vorming
https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Ftse2.mm.bing.net%2Fth%3Fid%3DOIP.frmsD5Nx5l95LgAHc6UZDAAAAA%26pid%3DApi&f=1

ülevaateid
https://www.techopedia.com/definition/793/bridge-protocol-data-unit-bpdu
https://en.wikipedia.org/wiki/Bridge_Protocol_Data_Unit
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/aci_virtual_edge/configuration/1-x/b_Virtual_Edge_Config_Guide_1_2_1/b_Virtual_Edge_Config_Guide_1_2_1_chapter_0101.pdf

turvalisus
https://www.juniper.net/documentation/en_US/junos/topics/concept/spanning-trees-bpdu-protection-understanding-ex-series.html