Answers to Earlier Practice Problems

Table 12-5, shown earlier, listed several practice problems. Table 12-9 lists the answers.

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Table 12-9 Practice Problems: Find the Network ID and Network Broadcast

The class, number of network octets, and number of host octets, all require you to look at the first octet of the IP address to determine the class. If a value is between 1 and 126, inclusive, the address is a Class A address, with one network and three host octets. If a value is between 128 and 191 inclusive, the address is a Class B address, with two network and two host octets. If a value is between 192 and 223, inclusive, it is a Class C address, ...

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