Tagged & Untagged (VLAN)

Vlan is a Virtual LAN. Switch will not break Broadcast Domain While using VLAN we can break broadcast domain.

Switch having more than one vlan. if its same Vlan data can be pass through one vlan to another. if its different Vlan we need router or L3 Switch.

· Tagged(trunk) VLAN means frame can be tagged which vlan that frame belongs to, that can be happen in trunk port of switch. Types of Trunk Tagging protocol 802.1Q and ISL and DTP.

· Untagged (access) VLAN. Frame cant be tagged while travelling from one switch to another switch. Eg: VLAN1 Native Vlan or Management VLAN. Frame cant mention which vlan the frame belongs.

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