You are working with a network that has the network ID 172.16.0.0, and you require 25 subnets for your company and an additional 30 for the company that will merge with you within a month. Each network will contain approximately 600 nodes. What subnet mask should you assign?

• 255.255.192.0
• 255.255.224.0
• 255.255.240.0
• 255,255.248.0
• 255.255.252.0