A network engineer is explaining Q-in-Q to a colleague. The colleague asks why the IEEE 802.1ad standard uses a different EtherType (0x88a8) for the outer tag instead of the standard 0x8100. What is the primary reason for this?

To reduce the frame size overhead by using a shorter tag header.

To allow the outer tag to carry more VLAN IDs than the inner tag.

To ensure compatibility with older equipment that only supports 0x88a8.

To distinguish the provider tag from the customer tag, allowing network devices to identify the outer tag and process it differently.

In a Q-in-Q deployment, which device typically adds the outer service provider VLAN tag?

The provider edge (PE) device at the service provider's network boundary

Juniper NetworksCertified Specialist, Service Provider Routing and Switching (JNCIS-SP)

Domain 5Objective 5

Provider Bridging (Q-in-Q Tunneling) JN0-364 Practice Questions (Page 1)

Part of the Layer 2 Bridging and VLANs domain, which makes up ~11% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–7 in this domain), expect 1–1 from this objective — we provide 14 practice questions to prepare you well beyond it. (estimate)

14questions here

3free pages

7concepts

Questions 1–5

1application · easy
A network engineer is explaining Q-in-Q to a colleague. The colleague asks why the IEEE 802.1ad standard uses a different EtherType (0x88a8) for the outer tag instead of the standard 0x8100. What is the primary reason for this?
Select an answer first
2foundation · easy
What is the default TPID value for an 802.1Q VLAN tag?
Select an answer first
3foundation · easy
In a Q-in-Q frame, which TPID value is typically used for the outer tag?
Select an answer first
4foundation · easy
A customer reports that traffic is not passing through a Q-in-Q tunnel. The provider checks the configuration and finds that the outer VLAN tag on the PE matches, but the inner tag does not. What is the most likely issue?
Select an answer first
5foundation · easy
In a Q-in-Q deployment, which device typically adds the outer service provider VLAN tag?
Select an answer first

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Provider Bridging (Q-in-Q Tunneling) JN0-364 Practice Questions (Page 1)

Questions 1–5

A network engineer is explaining Q-in-Q to a colleague. The colleague asks why the IEEE 802.1ad standard uses a different EtherType (0x88a8) for the outer tag instead of the standard 0x8100. What is the primary reason for this?

What is the default TPID value for an 802.1Q VLAN tag?

In a Q-in-Q frame, which TPID value is typically used for the outer tag?

A customer reports that traffic is not passing through a Q-in-Q tunnel. The provider checks the configuration and finds that the outer VLAN tag on the PE matches, but the inner tag does not. What is the most likely issue?

In a Q-in-Q deployment, which device typically adds the outer service provider VLAN tag?

Keep studying — Layer 2 Bridging and VLANs