802.1Q — CompTIA Network+ (N10-009) Practice Questions
IEEE 802.1Q is the standard that defines VLAN tagging on Ethernet frames and is a key topic within the switching section of the N10-009 exam. When a frame travels across a trunk link, an 802.1Q tag is inserted into the Ethernet header to identify which VLAN the frame belongs to. Candidates must understand the structure of the tag, including the 12-bit VLAN ID field, and know that the native VLAN is sent untagged by default, which can introduce a security vulnerability if misconfigured. Questions may also involve identifying the role of 802.1Q in multi-switch VLAN deployments.
Free questions on 802.1q
A network administrator configures a port for multiple VLANs using 802.1Q tagging. What is this port called?
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More 802.1q questions in the full bank
- What is the difference between a VLAN trunk and an access port on a switch? Unlock answer & explanation →
- What is the primary purpose of VLAN tagging in network switches? Unlock answer & explanation →
- You are tasked with implementing VLAN trunking between two switches using the 802.1Q protocol. Switch A is configured with Native VLAN 1, and Switch B is configured with Native VLAN 100. What issue might occur? Unlock answer & explanation →