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2440:141 Web Site Administration Exercise #2
The University of Akron Summit College
Dept of of Business Technology Computer Information Systems
Name: Sam Basch Exercises on Calculating Subnets 1.
You have a class A network number of 126.0.0.1 and you have decided to use the addresses on this network to satisfy the IP address requirements of 30 subnets. a) What is the default subnet mask? (2 points) 255.0.0.0 b)
Calculate a subnet mask that will fulfill this requirement. (3 points) 255.248.0.0
c)
Calculate the number of host addresses for each subnet. (3 points) 524288
d)
Calculate the number of usable host addresses for each subnet. (2 points) 524286
2.
3.
Suppose that you have a class B network address of 172.16.17.30 for 32 subnets. a) What is the default subnet mask? (2 points) 255.255.0.0 b)
Calculate a subnet mask that will fulfill this requirement. (3 points) 255.255.248.0
c)
Calculate the number of host addresses for each subnet. (3 points) 2048
d)
Calculate the number of usable host addresses for each subnet. (2 points) 2046
A network administrator has a class C network address of 204.17.5.0 requiring 4 subnets. a) What is the default subnet mask? (2 points) 255.255.255.0 b)
Calculate a subnet mask that will fulfill this requirement. (3 points)
c)
255.255.255.192 Calculate the number of host addresses for each subnet. (3 points)
64 d) Calculate the number of usable host addresses for each subnet. (2 points) 62
113737323.doc
Enoch E. Damson
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2440:141 Web Site Administration Exercise #2
4.
The University of Akron Summit College
Dept of Business Technology Computer Information Systems
You have a class A network number of 126.0.0.1 and you have decided to use the addresses on this network to satisfy the IP address requirements of 100 subnets. a) What is the default subnet mask? (2 points) 255.0.0.0 b)
Calculate a subnet mask that will fulfill this requirement. (3 points) 255.254.0.0
c)
Calculate the number of host addresses for each subnet. (3 points)
131072 d) Calculate the number of usable host addresses for each subnet. (2 points) 131070
5.
Suppose that you have a class B network address of 172.16.17.30 for 15 subnets. a) What is the default subnet mask? (2 points) 255.255.0.0 b)
Calculate a subnet mask that will fulfill this requirement. (3 points)
255.255.240.0 c) Calculate the number of host addresses for each subnet. (3 points) 4096 d) Calculate the number of usable host addresses for each subnet. (2 points) 4094 6.
A network administrator has a class C network address of 204.15.5.0 requiring 13 subnets. a) What is the default subnet mask? (2 points)
b)
255.255.255.0 Calculate a subnet mask that will fulfill this requirement. (3 points) 255.255.255. 240
c)
d)
Calculate the number of host addresses for each subnet. (3 points) 16
Calculate the number of usable host addresses for each subnet. (2 points) 14
