730 Appendix A: Answers to the "Do I Know This Already?" Quizzes and Q&A Sections
7
Given the IP address 190.1.42.3 and the mask 255.255.255.0, what is the subnet number?
The subnet is 190.1.42.0. The binary algorithm math is shown in the table that follows.
8
Given the IP address 200.1.1.130 and the mask 255.255.255.224, what is the subnet
number?
The subnet is 200.1.1.128. The binary algorithm math is shown in the table that follows.
9
Given the IP address 220.8.7.100 and the mask 255.255.255.240, what is the subnet
number?
The subnet is 220.8.7.96. The binary algorithm math is shown in the table that follows.
10
Given the IP address 140.1.1.1 and the mask 255.255.255.248, what is the subnet
number?
The subnet is 140.1.1.0. The binary algorithm math is shown in the table that follows.
11
Given the IP address 167.88.99.66 and the mask 255.255.255.192, what is the subnet
number?
The subnet is 167.88.99.64. The binary algorithm math is shown in the table that follows.
Address
190.1.42.3
1011 1110 0000 0001 0010 1010 0000 0011
Mask
255.255.255.0
1111 1111 1111 1111 1111 1111 0000 0000
Result
190.1.42.0
1011 1110 0000 0001 0010 1010 0000 0000
Address
200.1.1.130
1100 1000 0000 0001 0000 0001 1000 0010
Mask
255.255.255.224
1111 1111 1111 1111 1111 1111 1110 0000
Result
200.1.1.128
1100 1000 0000 0001 0000 0001 1000 0000
Address
220.8.7.100
1101 1100 0000 1000 0000 0111 0110 0100
Mask
255.255.255.240
1111 1111 1111 1111 1111 1111 1111 0000
Result
220.8.7.96
1101 1100 0000 1000 0000 0111 0110 0000
Address
140.1.1.1
1000 1100 0000 0001 0000 0001 0000 0001
Mask
255.255.255.248
1111 1111 1111 1111 1111 1111 1111 1000
Result
140.1.1.0
1000 1100 0000 0001 0000 0001 0000 0000
Address
167.88.99.66
1010 0111 0101 1000 0110 0011 0100 0010
Mask
255.255.255.192
1111 1111 1111 1111 1111 1111 1100 0000
Result
167.88.99.64
1010 0111 0101 1000 0110 0011 0100 0000
apA.fm Page 730 Monday, March 20, 2000 5:24 PM