From the course: Learning Subnetting

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Address classes

Address classes

From the course: Learning Subnetting

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Address classes

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- [Instructor] To get really good at IP subnetting there's some information that we just need to memorize. For example we need to memorize the different IP version 4 address classes. I would want you to be able to look at any IP version 4 address and immediately say, well that's a class C IP address or that's a class A IP address. We need to memorize these. And they can be fairly easy to recognize because we only have to look at the First Octet. Remember the Dotted Decimal Notation, we had four octets separated by a period, by a dot. Well we're just looking at that first field that First Octet. And if we have an IP address in the range of one through 126 by definition that is a Class A IP address. And something else we need to memorize with these classes of addresses. We need to memorize what subnet masks that they have by default. Remember in the prior video we took a look at an IP address of 10.1.2.3 and I said by default, it's got a subnet mask of eight binary ones and then 24…

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