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31 Days Before Your CCENT Certification by Scott Bennett

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CCNA Discovery 1, Chapter 5

5.2.1 and 5.2.2: You can identify networks quickly as Class A, B, or C networks using Table 20-4. These default network classes have a default subnet mask and a specific network-to-host ratio. You would use a Class A network for a maximum number of hosts and a Class C network for a smaller network that needs only a few hosts. Class D and E networks are not for commercial use.

Table 20-4. Class A, B, C, D, and E Networks

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Request For Comments (RFC) 1918 identifies the networks reserved for internal or private use. A company or office can use the private networks identified in Table 20-5. However, to connect the private ...

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