1D0-460 CIW Internetworking Professional
Note 2: 1D0-460 Answers are not shown in demo questions.
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Demo Question 20.
A. Subnetting
B. Supernetting
C. IP forwarding
D. Multicasting
Display Answer
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Answer: B
Explanation: CIDR is a form of supernetting. It is essentially subnetting in reverse. In
supernetting, or CIDR, we combine subnets to make a larger network. Remember in
subnetting, we take a network and slice it up into subnet pieces. In Supernetting, we take
pieces and splice them together to make a larger address space. Now supernetting does
require that certain rules be followed, since you can't just take any pieces and splice them.
The subnets being combined must be contiguous, the number of subnets being combined a
power of two, and the first subnet should start at that power of two. What is done in the
CIDR/Supernetting is to drop back on the 1 bits in the subnet mask. (Remember, in
subnetting, we added 1 bits to the subnet mask).
Incorrect
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