You are tasked to configure the DHCP server to lease the last 100 usable IP addresses in subnet 10.1.4.0/23. Which of the following IP addresses could be leased as a result of the new configuration?

10.1.4.254 resides in the lower half (10.1.4.x) of the /23 subnet and is not among the last 100 usable addresses, which all begin at 10.1.5.155.

10.1.255.200 is entirely outside the 10.1.4.0/23 subnet, which only extends to 10.1.5.255.

A /23 prefix provides 512 total addresses (2^9), so 10.1.4.0/23 spans 10.1.4.0 to 10.1.5.255 with 510 usable host addresses (10.1.4.1 to 10.1.5.254). Counting back 100 addresses from the last usable host (10.1.5.254) gives a lease range of 10.1.5.155 to 10.1.5.254, and 10.1.5.200 falls within that range.

10.1.4.156 is in the 10.1.4.x portion of the subnet, well below the 10.1.5.155-10.1.5.254 range that constitutes the last 100 usable addresses.