What is Spanning Tree Protocol


The Quick Definition: Spanning Tree Protocol (STP) is used to prevent Layer 2 loops, commonly known as broadcast storms, from disrupting local area networks. STP virtually disconnects redundant links to prevent loops from occurring.

If you’re tasked with managing bridges and switches, you’ll probably encounter spanning tree protocol (STP) during your configurations. STP is used to configure backup connections when linking between two bridges or switches fails. It provides the most efficient way to forward information between LAN segments, reducing performance issues — without losing redundancy.

Root Bridge Election
After you connect switches or bridges together, the first thing your hardware does is select a root bridge. This can be any one of the switches, but Cisco normally chooses the switch with the lowest MAC address. It does this because it’s likely the longest switch in service, but it could also be the slowest. This is why some network administrators choose to configure switches manually.

STP has an algorithm that identifies the most efficient route to the root bridge. The root bridge is considered the center of the network. So, the algorithm calculates the most efficient route for performance.

More about : network security level

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