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Exam Essentials
167
The following table shows the last three subnets and their valid hosts and
broadcast addresses:
Summary
W
ow... I'm truly impressed--especially if you made it this far and
understood everything the first time through! We really covered a lot of
ground in this chapter, and it is the largest chapter in the book. You learned
about the Internet Protocol stack, as well as IP addressing and subnetting--
all in one huge bite! (Or byte.)
But it's truly priceless information--not only for the CCNA exam, of course,
but also in any networking job or production environment you would ever find
yourself working in--from designing and building to troubleshooting. And
even if you did get it all the first time around, it really wouldn't hurt you to read
this chapter more than once and to practice subnetting as much as possible. It's
just that critical. You could even ask a friend to write out valid IP addresses for
which you would have to reply with the subnet, broadcast address, and valid
host range. Make sure it's a good friend though!
And I promise I won't throw any more gruesome chapters at you! That's
your reward for getting through this one. There's still lot's of ground to cover,
but it will be given to you in smaller, more manageable servings from now on.
Think about it like this, since you've already come this far, there's no reason to
stop now and waste all those brainwaves and new neurons. So don't stop--go
through the written and review questions at the end of this chapter and make
sure you understand each answer's explanation. The best is yet to come!
Exam Essentials
Remember the Process/Application layer protocols. Telnet, which is a
terminal emulation program and allows you to log into a remote host and
Subnet
10.255.255.0
10.255.255.64
10.255.255.128
First host
10.255.255.1
10.255.255.65
10.255.255.129
Last host
10.255.255.62
10.255.255.126
10.255.255.190
Broadcast
10.255.255.63
10.255.255.127
10.255.255.191
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