A customer requires new MCs for a large multi-site network with about 600 AP-535S ana 30,000 wireless clients. The customer requires redundancy for the MCs, with each MC being able to handle the full toad in a failover situation The network should be able to sustain the loss of a controller with stateful failover within seconds. It should be able to undergo software upgrades without downtime.
The architect has recommended two 7240XM MCs. The customer points out that 7220 MCs can support their requirements and wonders why the architect recommended me 7240XMS.
What should the architect explain?