Question

You want to divide your network into eight networks. How many bits will you need to take from the host ID portion of the subnet mask? A. 2 B. 3 C. 4 D. 6 

     You want to divide your network into eight networks. How many bits will you need to take from the host ID portion of the subnet mask?
A. 2
B. 3
C. 4
D. 6
CompTIA Network plus Certification Study Guide
CompTIA Network plus Certification Study Guide
Glen Clarke 4th Edition
Chapter 5, Problem 2 ↓

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Step 1: First, determine the number of networks you want to create, which is 8.  Show more…

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You want to divide your network into eight networks. How many bits will you need to take from the host ID portion of the subnet mask? A. 2 B. 3 C. 4 D. 6
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Key Concepts

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Powers of Two Calculation
The number of subnets created when borrowing bits is determined by calculating 2 raised to the power of the number of bits borrowed. For example, borrowing 3 bits yields 2^3, which equals 8, the required number to divide the network into eight subnets.
Subnetting
Subnetting is the process of dividing a larger network into smaller, more manageable subnetworks by adjusting the network's subnet mask. It improves routing efficiency, enhances security, and optimizes the allocation of network addresses.
Bit Borrowing
Bit borrowing involves reallocating bits from the host portion of an IP address to the network portion to create additional subnets. This technique is used to increase the number of available subnetworks, trading off the number of host addresses per subnet for more network segments.
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What is the least number of bits you would need to borrow from the network portion of a Class B subnet mask to get at least 130 hosts per subnet? a. None b. Eight c. Nine d. Ten
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