You have 192.168.10.0/24 and need subnets for 14 hosts per subnet. What is the smallest subnet mask, and what are the first and last usable IPs for the first subnet?

• A. /28 (255.255.255.240); first usable 192.168.10.1, last usable 192.168.10.14
• B. /30 (255.255.255.252); first usable 192.168.10.1, last usable 192.168.10.2
• C. /27 (255.255.255.224); first usable 192.168.10.1, last usable 192.168.10.30
• D. /29 (255.255.255.248); first usable 192.168.10.1, last usable 192.168.10.6

Answer: (A)