Which pair of IP address/mask options allows IP connections between hosts A and B?

For hosts A and B to be able to communicate with each other over IP, they need to be part of the same subnet. The subnet is determined by the combination of the IP address and the subnet mask.

The option with the address 10.1.2.192/24 for host A covers an IP range from 10.1.2.0 to 10.1.2.255. This means that any host within this range can communicate directly with host A without the need for a router.

Host B with an IP address of 10.1.2.129/26 has a subnet mask that allows for a range of IPs from 10.1.2.128 to 10.1.2.191. Although this may initially seem limiting, it allows for communication with A because 10.1.2.129 falls within the subnet of the broader range covered by host A's address.

Since both hosts A and B can resolve each other's respective IP addresses as being on the same network or subnet, they can successfully communicate. The correct answer reflects the fact that the addresses are aligned in such a way that supports interconnection under their defined subnets.

This means that host A and host