200-301 Question 147
Single answerA network administrator is troubleshooting an issue where a switch is not forwarding traffic to a specific VLAN. The administrator suspects the issue is related to how the switch processes frames. Which switching concept is MOST relevant to resolving this issue?
- A
MAC address table
- B
VLAN tagging
- C
Spanning Tree Protocol (STP)
- D
Port mirroring
Show answer and explanation
Correct answer: B
Explanation
VLAN tagging is the most relevant switching concept in this scenario because it determines how the switch processes frames associated with specific VLANs. Misconfigurations in VLAN tagging can lead to issues where traffic is not forwarded correctly to the intended VLAN, making it crucial to check this configuration when troubleshooting VLAN-related issues.
- A. Incorrect.
The MAC address table is used to map MAC addresses to switch ports for forwarding frames, but it is not directly related to VLAN tagging or VLAN-specific issues.
- B. Correct.
VLAN tagging is the process of adding VLAN information to Ethernet frames, making it crucial for ensuring traffic is forwarded correctly within the appropriate VLAN.
- C. Incorrect.
Spanning Tree Protocol (STP) prevents loops in a network but does not directly affect VLAN-related issues unless the VLAN is blocked due to STP configuration.
- D. Incorrect.
Port mirroring is a feature used for monitoring traffic on a switch port and does not impact VLAN traffic forwarding.