A user has three different subnets in an office. Which of the following can be configured to allow two of the subnets to communicate directly with each other at the switch level?

The correct answer is B. 802.1q. 802.1Q is the IEEE standard for VLAN tagging on Ethernet frames. It allows a switch to carry traffic from multiple VLANs over a single trunk link and, on a Layer 3 switch, enables inter-VLAN routing so that devices on different subnets can communicate directly at the switch…

Network implementation

Question

Options

A802.1af
B802.1q
C802.1x
D802.2

How the community answered

(45 responses)

B
96% (43)
C
2% (1)
D
2% (1)

Explanation

802.1Q is the IEEE standard for VLAN tagging on Ethernet frames. It allows a switch to carry traffic from multiple VLANs over a single trunk link and, on a Layer 3 switch, enables inter-VLAN routing so that devices on different subnets can communicate directly at the switch level without an external router. 802.1af is not a standard IEEE designation (PoE is 802.3af). 802.1X is port-based network access control (authentication). 802.2 defines the Logical Link Control (LLC) sublayer of the data link layer.

Topics

#802.1q#VLAN#trunking#inter-subnet communication

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