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 is a valid host address within the /23 subnet but resides in the lower 10.1.4.x half of the block, far outside the last 100 usable addresses which begin at 10.1.5.155.

10.1.255.200 is outside the 10.1.4.0/23 subnet entirely; the subnet's broadcast address is 10.1.5.255, so any address in the 10.1.255.x range belongs to a different network.

A /23 prefix on 10.1.4.0 produces a 512-address block (10.1.4.0 to 10.1.5.255) with 510 usable host addresses from 10.1.4.1 to 10.1.5.254. Counting back 100 addresses from the last usable address yields a DHCP scope of 10.1.5.155 to 10.1.5.254, and 10.1.5.200 falls within that range. None of the other answer choices fall within this last-100 window.

10.1.4.156 is a valid host address within the /23 subnet but is located in the 10.1.4.x range, which is not within the last 100 usable addresses (10.1.5.155 to 10.1.5.254).