Answers to the Chapter 5 Q&A Section 737
32
How many IP addresses could be assigned in each subnet of 134.141.0.0, assuming that
a mask of 255.255.255.0 is used? If the same (static) mask is used for all subnets, how
many subnets are there?
There will be 2
hostbits
, or 2
8
hosts per subnet, minus two special cases. The number of
subnets will be 2
subnetbits
, or 2
8
, in this case. The chart that follows summarizes the related
information in the same manner as the "Foundation Topics" section of Chapter 5
described the binary algorithm to solve this type of problem.
33
How many IP addresses could be assigned in each subnet of 10.0.0.0, assuming that a
mask of 255.255.255.0 is used? If the same (static) mask is used for all subnets, how many
subnets are there?
There will be 2
hostbits
, or 2
8
hosts per subnet, minus two special cases. The number of
subnets will be 2
subnetbits
, or 2
16
, in this case. The chart that follows summarizes the
related information in the same manner as the "Foundation Topics" section of Chapter 5
described the binary algorithm to solve this type of problem.
Step 6
1000 1100 0000 0001 0000 0000 0010 1000
140.1.0.24
Step 6
1000 1100 0000 0001 0000 0000 0011 0000
140.1.0.32
Step 6
1000 1100 0000 0001 0000 0000 0011 1000
140.1.0.40
Skipped a few for brevity
Step 6
1000 1100 0000 0001 1111 1111 1111 1000
140.1.255.248
Network and
Mask
Number of
Network Bits
Number of
Host Bits
Number of
Subnet Bits
Number of
Hosts per
Subnet
Number of
Subnets
134.141.0.0,
255.255.255.0
16
8
8
254
256
Network and
Mask
Number of
Network Bits
Number of
Host Bits
Number of
Subnet Bits
Number of
Hosts per
Subnet
Number of
Subnets
10.0.0.0,
255.255.255.0
8
8
16
254
65,536
apA.fm Page 737 Monday, March 20, 2000 5:24 PM