Which of the following does not belong to the message type used in the process of establishing Mesh neighbors? (Multiple choice)

Question

Options

• AMesh Peering Open
• BMesh Peering Confirm
• CHello
• DMesh Peering Close

• A
  7% (4)
• B
  14% (8)
• C
  79% (46)

Explanation

In IEEE 802.11s mesh networking, establishing a mesh peer link (neighbor relationship) uses only two frames: Mesh Peering Open and Mesh Peering Confirm - making C and D the correct "does not belong" answers.

C (Hello) is not part of the 802.11s mesh peering protocol at all; "Hello" messages belong to routing protocols like OSPF or OLSR, not the mesh neighbor establishment handshake.

D (Mesh Peering Close) is a real 802.11s frame, but it tears down an existing peer link - it plays no role in establishing one, so it doesn't belong in the establishment process.

A (Mesh Peering Open) and B (Mesh Peering Confirm) are the two frames that do belong: Open initiates the handshake and Confirm completes it, analogous to a TCP SYN / SYN-ACK.

Memory tip: Think "Open → Confirm = Build; Close = Destroy." For the exam, remember that establishment is a 2-step handshake (Open + Confirm), and anything outside those two frames - including teardown messages and foreign-protocol messages - does not belong to the establishment phase.

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