Which ports were configured as untagged members of VLAN 2 on the switch?

Which ports were configured as untagged members of VLAN 2 on the switch?

• A. GE2, GE3, GE4, GE5
• B. GE18, GE19, GE22, GE23
• C. GE18, GE19, GE20, GE21
• D. GE18, GE19, GE21, GE22

Answer: (C)

VLAN tagging and untagged ports define how switch ports carry traffic for specific VLANs. An untagged port is an access port assigned to one VLAN; devices connected to it send and receive frames without VLAN tags, and the switch associates those frames with that VLAN using the port’s PVID (Port VLAN ID). Trunk ports, by contrast, carry traffic for multiple VLANs with tags. Here, the ports that are untagged members of VLAN 2 are the ones configured as access ports for VLAN 2 (PVID 2). GE18, GE19, GE20, and GE21 are set up this way, so they carry VLAN 2 traffic untagged to devices and accept untagged frames from them. The other port groupings would represent ports configured for VLAN 2 in a tagged/trunk context or assigned to a different VLAN, so they wouldn’t be untagged members of VLAN 2.

VLAN tagging and untagged ports define how switch ports carry traffic for specific VLANs. An untagged port is an access port assigned to one VLAN; devices connected to it send and receive frames without VLAN tags, and the switch associates those frames with that VLAN using the port’s PVID (Port VLAN ID). Trunk ports, by contrast, carry traffic for multiple VLANs with tags.

Here, the ports that are untagged members of VLAN 2 are the ones configured as access ports for VLAN 2 (PVID 2). GE18, GE19, GE20, and GE21 are set up this way, so they carry VLAN 2 traffic untagged to devices and accept untagged frames from them.

The other port groupings would represent ports configured for VLAN 2 in a tagged/trunk context or assigned to a different VLAN, so they wouldn’t be untagged members of VLAN 2.