Chapter 14. Converting Subnet Masks

This chapter covers the following subjects:

Subnet Mask Conversion: This section explains how to convert subnet masks between the three formats: binary, dotted decimal, and prefix.

Practice Converting Subnet Masks: This section provides practices problems and tips for converting between the three subnet mask formats.

Subnet masks serve many important roles in the world of IPv4 addressing and subnetting. However, this chapter ignores those roles. Instead, this chapter focuses on the numbers used as subnet masks, focusing on the three different formats for subnet masks:

Binary

Dotted-decimal notation (DDN)

Prefix (also called CIDR)

This chapter focuses on the numbers, and converting between three different ...

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