Root Bridge, Designated Port, Alternate Port | Spanning Tree Protocol

We will be discussing Spanning-Tree topcs found on the CCNBA 200-301 Exam Blueprint.
Learn what a Root Port is and how a switch chooses which port will be its root port.
Learn what a Designated Port is and whether a port will become Desginated, or will it become an Alternate port.
Learn the difference between a port in the Forwarding state vs the Block state. Root Ports, Designated Ports, and Alternate ports will either be in a forwarding state or a blocking state. This is what will prevent a frame from looping between switches

[@whitneykenny6642]

Best explanation by far

[@Mk-mi1wj]

great video Thank you.

[@tabliqatchi6696]

What's the point of not assuming both ports on a segment alternate (blocked)? Keeping one of them as Designated seems useless, because it forwards traffic to a blocked port and it always gets dropped. (Talking of STP 802.1D)

[@viuvanegrapc1]

Greate lesson! One point: On Common STP (802.1D) is there a port called alternate? I think that alternate port only exists on RSTP. The role originally defined by the 802.1D STP for alternate and backup ports was non-designated.

[@ciscenius]

It’s not Al Alternate port. It’s just labeled as a non designated port. But it does the same thing