Practice Analyzing Existing Subnets
Before moving to the next chapter, practice until you get the right answer most of the time—but use any tools you want and take all the time you need. Then, you can move on with your reading.
However, before taking the exam, practice until you master the topics in this chapter and can move pretty fast. As for time, you should be able to find the subnet ID, based on an IP address and mask, in around 15 seconds. You should also strive to start with a subnet ID/mask, and find the broadcast address and range of addresses, in another 15 seconds. Table 16-11 summarizes the key concepts and suggestions for this two-phase approach.
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