If looped Layer 2 broadcast messages accumulate and congest a network, this is called a [...]broadcast storm
When a switch rapidly and continuously updates a MAC address in its MAC address table, alternating between different interfaces, this is known as [...]MAC address flapping
"'Classic' Spanning Tree Protocol is IEEE [...]"802.1D
Do all switches run STP by default?Yes
The messages sent by STP switches are called:BPDUs (Bridge Protocol Data Units)
What does BPDU stand for?Bridge Protocol Data Unit
How many root bridges are elected in STP?One
Which field in the STP BPDU is used to elect the root bridge?Bridge ID field
STP: The switch with the lowest [...] becomes the root bridge.Bridge ID
STP: All ports on the root bridge are [...] ports (forwarding state)designated
STP: The default bridge priority is [...] (not including Extended System ID)32768
Three fields of the STP Bridge ID:<div>[...] (4 bits)</div><div>Extended System ID (12 bits)</div><div>MAC Address (48 bits)</div>Bridge Priority
Three fields of the STP Bridge ID:<div>Bridge Priority (4 bits)</div><div>[...] (12 bits)</div><div>MAC Address (48 bits)</div>Extended System ID (VLAN ID)
Three fields of the STP Bridge ID:<div>Bridge Priority (4 bits)</div><div>Extended System ID (12 bits)</div><div>[...] (48 bits)</div>MAC Address
Three fields of the STP Bridge ID:<div>Bridge Priority ([...] bits)</div><div>Extended System ID (12 bits)</div><div>MAC Address (48 bits)</div>4
Three fields of the STP Bridge ID:<div>Bridge Priority (4 bits)</div><div>Extended System ID ([...] bits)</div><div>MAC Address (48 bits)</div>12
Three fields of the STP Bridge ID:<div>Bridge Priority (4 bits)</div><div>Extended System ID (12 bits)</div><div>MAC Address ([...] bits)</div>48
Cisco switches use a version of STP called [...], which runs a separate spanning tree instance in each VLAN.PVST (Per-Vlan Spanning Tree)
What does PVST stand for?Per-VLAN Spanning Tree
The STP bridge priority can be changed in units of [...]"4096<div><br></div><div>Possible values (you don't have to memorize these!):</div><div>0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152, 53248, 57344, or 61440<br></div>"
STP Designated ports are in a [...] state.forwarding
STP: When a switch is powered on, it assumes the role of [...] bridge.root
In an 802.1D STP network, which switch(es) send BPDUs?Root bridge only
Interface Speed: 10 Mbps<div>802.1D STP cost: [...]</div>100
Interface Speed: [...]<div>802.1D STP cost: 100</div>10 Mbps
Interface Speed: 100 Mbps<div>802.1D STP cost: [...]</div>19
Interface Speed: [...]<div>802.1D STP cost: 19</div>100 Mbps
Interface Speed: 1 Gbps<div>802.1D STP cost: [...]</div>4
Interface Speed: [...]<div>802.1D STP cost: 4</div>1 Gbps
Interface Speed: 10 Gbps<div>802.1D STP cost: [...]</div>2
Interface Speed: [...]<div>802.1D STP cost: 2</div>10 Gbps
STP root port selection:<div>1: Lowest [...]</div><div>2: Lowest [...]</div><div>3: Lowest [...]</div>1. root cost<div>2. neighbor bridge ID</div><div>3. neighbor port ID</div>
STP: There must be one [...] port per collision domain.designated
STP: There must be one designated port per [...].<br>collision domain
STP Root ports are in a [...] state.forwarding
STP Non-Designated ports are in a [...] stateblocking