A wireless engineer at a convention center has been asked to provision an SSID that can accommodate 4,000 users during a conference. Which interface group configuration should be used?

A single /20 interface provides 4,094 addresses and can numerically hold 4,000 clients, but concentrates all users into one massive broadcast domain, generating excessive broadcast traffic that degrades performance at this scale.

Two /21 interfaces provide 4,092 usable addresses total, which is sufficient in quantity, but each VLAN would hold up to 2,046 clients - a broadcast domain four times larger than a /23, creating significant overhead in a high-density environment.

Four /22 interfaces yield 4,088 usable addresses and accommodate the user count, but each /22 VLAN supports up to 1,022 clients, resulting in broadcast domains twice the size of /23 subnets and degraded performance compared to option D.

A /23 subnet provides 510 usable host addresses, so eight interfaces yield approximately 4,080 total addresses - sufficient for 4,000 concurrent users. Distributing clients across eight VLANs caps each broadcast domain at around 500 hosts, substantially reducing broadcast overhead and DHCP scope contention, which is critical for maintaining performance at convention-scale user density.