Now assume Host A IP address is 212.149.5.50, Host B IP address is 212.149.105.150, and subnet mask is 255.255.0.0. This may not be a standard Network class (class A, B or C), but you draw your conclusion based on subnet mask definition. The purpose is to evaluate whether you have learnt the meaning of subnet mask, Network ID and valid range of IP addresses in a network. What are the Network IDs for Host A and B? Are they in the same LAN? What is the valid IP range for Host A's network? What is the valid IP range for Host B's network? A's NetID: 212.149.5.0, B's NetID: 212.149.105.0, No, Host A's valid IP range: 212.149.0.1 to 212.149.255.254, Host B's valid IP range: 212.149.0.1 to 212.149.255.254 A's NetID: 212.149.0.0, B's NetID: 212.149.0.0, Yes, Host A's valid IP range: 212.149.0.1 to 212.149.255.254, Host B's valid IP range: 212.149.0.1 to 212.149.255.254 A's NetID: 212.149.5.0, B's NetID: 212.149.105.0, Yes, Host A's valid IP range: 212.149.0.1 to 212.149.255.254, Host B's valid IP range: 212.149.0.1 to 212.149.255.254 A's NetID: 212.149.0.0, B's NetID: 212.149.0.0, Yes, Host A's valid IP range: 212.149.5.1 to 212.149.5.254, Host B's valid IP range: 212.149.105.1 to 212.149.105.254