When configuring WLAN services, you can configure the service VLAN as a VLAN pool . Which of the following descriptions about VLAN Pool is wrong?

Question

Options

• AThe allocation algorithm of the VLAN pool is hash. If the same STA goes online multiple times,
• BThe created VLAN cannot be added to the VLAN pool
• CConfiguring a VLAN pool can effectively reduce the number of STAs in a single VLAN and reduce
• DIf the VLAN pool allocation algorithm is even, the same STA goes online multiple times, and the

• A
  15% (7)
• B
  72% (33)
• C
  9% (4)
• D
  4% (2)

Explanation

Option B is the incorrect description because created VLANs absolutely can - and must - be added to a VLAN pool; the entire purpose of a VLAN pool is to group pre-created VLANs so the system can dynamically assign them to STAs (wireless stations). Option A is a true statement: the hash algorithm uses the STA's MAC address to compute a deterministic mapping, so the same STA always lands on the same VLAN across multiple logins. Option C is also true: distributing STAs across multiple VLANs in a pool shrinks each VLAN's broadcast domain, reducing congestion and improving scalability. Option D is equally valid: the even (round-robin) algorithm assigns VLANs sequentially to new sessions, so the same STA can receive a different VLAN on repeated logins - the opposite behavior from hash.

Memory tip: Think "pool = collection of things that already exist" - you can't pool what you haven't created. Also remember the core contrast: Hash = same MAC → same VLAN (sticky); Even = next in line → may vary (rotating).

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