What subnet mask was considered the default for a Class B address?
A) 255.255.0.0
B) 255.255.255.0
C) 255.0.0.0
D) 255.255.255.255
E) Just throw a bunch of numbers and dots together
The answer: A) 255.255.0.0
In the outdated class-based IP addressing scheme, subnet masks were determined automatically based on the IP address. Class B addresses started with the range of 128 through 191, and they were assigned a default subnet mask of 255.255.0.0.
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Want to know more? Watch “TCP/IP Subnets.”Our TCP/IP networks are separated into many subnets. In this video, you’ll learn about the fundamentals of IP subnetting and how legacy class-based and modern classless subnetting is used to connect the worldwide Internet. |
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