Which type of tunnel is required between two WLCs to enable intercontroller roaming?

Question

Options

• ACAPWAP
• BLWAPP
• Cmobility
• DIPsec

• A
  5% (2)
• B
  7% (3)
• C
  86% (37)
• D
  2% (1)

Explanation

Mobility tunnels are specifically created between Wireless LAN Controllers (WLCs) to facilitate intercontroller roaming, allowing client sessions and state information to be seamlessly transferred between controllers when a client moves between access points managed by different WLCs.

Why the distractors are wrong:

• A (CAPWAP): CAPWAP tunnels operate between access points and their WLC - they carry control and data traffic in the AP-to-controller relationship, not between two controllers.
• B (LWAPP): LWAPP is the older predecessor protocol to CAPWAP and similarly describes AP-to-controller communication, not controller-to-controller communication.
• D (IPsec): While IPsec can encrypt mobility tunnels in certain deployments, it is not the type of tunnel required - it is an optional security overlay.

Memory Tip: Think of it this way - when clients move (roam), they need a mobility tunnel. The word "mobility" directly maps to the concept of movement between controllers, making it easy to associate with roaming scenarios. If the question involves AP ↔ WLC, think CAPWAP; if it involves WLC ↔ WLC, think mobility.

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