A company is migrating a large fleet of on-premises servers into the public cloud. The number of servers is estimated to be between 800 and 900. The systems administrator is doing the network planning

A /22 subnet allocates 2^10 = 1024 total addresses minus 2 reserved (network and broadcast), yielding 1022 usable host addresses - enough to accommodate 800-900 servers.

A /23 subnet provides only 2^9 - 2 = 510 usable host addresses, which is insufficient for a fleet of 800-900 servers.

A /23 subnet provides only 510 usable host addresses regardless of the base address range, falling far short of the 800-900 server requirement.

A /23 subnet provides only 510 usable host addresses and cannot support 800-900 servers, regardless of whether private 192.168.x.x space is used.

A /24 subnet provides only 2^8 - 2 = 254 usable host addresses, far too few for a fleet of 800-900 servers.

A /21 subnet allocates 2^11 = 2048 total addresses minus 2 reserved, yielding 2046 usable host addresses, comfortably accommodating the 800-900 server fleet with capacity to spare.