A MSP partner needs to setup a Partner Gateway and configure the Handoff Interlace. Which are the valid configuration options for the Tag type?

Question

Options

• ANone, 802.1q, 802.3ad, and QinQ(0x8100) / QinQ(0x9100)
• BNone. 802.1q. 802.1ad, arid QinQ(0x8100) / QinQ(0x9100)
• CNone, 802.1q. 802.1ac, and QinQ(0x8100) / QinQ(0x9100)
• DNone, 802.1d, 802.1ad, and QinQ(0x8100) / QinQ(0x9100)

• B
  93% (37)
• C
  5% (2)
• D
  3% (1)

Explanation

Option B lists the correct Tag type options because 802.1q is the standard for single VLAN tagging, 802.1ad is the IEEE standard for Provider Bridging (stacked VLANs / QinQ), and the QinQ EtherType variants (0x8100 and 0x9100) are valid non-standard double-tagging options - all of which are legitimate choices on a Handoff Interface.

Why the distractors fail:

• A substitutes 802.3ad, which is the Link Aggregation Control Protocol (LACP) standard for bonding physical links - it has nothing to do with VLAN tagging.
• C substitutes 802.1ac, which does not define a valid VLAN tagging protocol in this context (it refers to MAC Service Definition maintenance, not encapsulation).
• D substitutes 802.1d, which is the Spanning Tree Protocol (STP) - again, a switching/loop-prevention standard, not a tagging standard.

Memory tip: Associate the "1" in 802.1q and 802.1ad with VLAN Layer-1/2 tagging standards, while 802.3ad (Link Aggregation) and 802.1d (STP) serve entirely different Layer 2 functions - if you see those as tag type options, they're traps.

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