What is the default subnet mask for an IP address of 198.133.219.4?
- 255.0.0.0
- 255.255.0.0
- 255.255.255.0
- 255.255.255.255
Answers Explanation & Hints: In classful IPv4 addressing, a network with the first octet of 198 is a Class C network with the default subnet mask of 255.255.255.0.