Student Name: ___________________________
CHABOT COLLEGE
CISCO NETWORKING ACADEMY I
10B - SUBNET DEFINITION
Directions: Complete the table for the Class C address shown below:
Note the subnet mask: 2 bits for subnet, 6 bits for host.
Note also that 22 = 4 and 26 = 64.
Because there are 64 host addresses per subnet, the subnet address increment is 64!
(To get you started, the first three rows have been completed.)
Sub
net
Network
Address
Subnet mask
Subnetwork Address
Range of possible
Host IP Addresses
Broadcast Address
Is Subnet
Usable?
209.22.54.0
209.22.54.1 - 62
209.22.54.63
N
0
209.22.54.0 255.255.255.192
1
209.22.54.0 255.255.255.192
"
.64
"
.65 - 126
"
.127
Y
2
209.22.54.0 255.255.255.192
"
.128
"
.129 - 190
"
.191
Y
3
209.22.54.0 255.255.255.192
N
Directions: Complete the table for the Class C address shown below:
Note the subnet mask: 3 bits for subnet, 5 bits for host.
Remember: 23 = 8 and 25 = 32.
What is the subnet address increment? _________
Sub
net
Network
Address
Subnet mask
0
209.22.54.0 255.255.255.224
1
209.22.54.0 255.255.255.224
2
209.22.54.0 255.255.255.224
3
209.22.54.0 255.255.255.224
4
209.22.54.0 255.255.255.224
5
209.22.54.0 255.255.255.224
6
209.22.54.0 255.255.255.224
7
209.22.54.0 255.255.255.224
Range of possible
Host IP Addresses
Subnetwork Address
1
Broadcast Address
Is Subnet
Useable?
Student Name: ___________________________
Directions: Complete the table for the Class C address shown below:
Note the subnet mask: 4 bits for subnet, 4 bits for host.
Remember: 24 = 16.
Sub
net
Network
Address
Subnet mask
0
209.22.54.0 255.255.255.240
1
209.22.54.0 255.255.255.240
2
209.22.54.0 255.255.255.240
3
209.22.54.0 255.255.255.240
4
209.22.54.0 255.255.255. 240
5
209.22.54.0 255.255.255. 240
6
209.22.54.0 255.255.255. 240
7
209.22.54.0 255.255.255. 240
8
209.22.54.0 255.255.255. 240
9
209.22.54.0 255.255.255. 240
Range of possible
Host IP Addresses
Subnetwork Address
10 209.22.54.0 255.255.255. 240
11 209.22.54.0 255.255.255. 240
12 209.22.54.0 255.255.255. 240
13 209.22.54.0 255.255.255. 240
14 209.22.54.0 255.255.255. 240
15 209.22.54.0 255.255.255. 240
Continue on page 3...
2
Broadcast Address
Is Subnet
Useable?
Student Name: ___________________________
Directions: Complete the table for the Class C address shown below:
Note the subnet mask: 5 bits for subnet, 3 bits for host.
Remember: 25 = 32 and 23 = 8.
Sub
net
Network
Address
Subnet mask
0
209.22.54.0 255.255.255.248
1
209.22.54.0 255.255.255.248
2
209.22.54.0 255.255.255.248
3
209.22.54.0 255.255.255.248
Range of possible
Host IP Addresses
Subnetwork Address
Broadcast Address
Is Subnet
Useable?
Broadcast Address
Is Subnet
Useable?
Stop here...
1.
How many subnets would there be with a mask of 255.255.255.248? __________
2.
How many of them would be usable? __________
3.
How many host addresses per subnet? ________
4.
How many of them would be usable? __________
Directions: Complete the table for the Class C address shown below:
Note the subnet mask: 6 bits for subnet, 2 bits for host.
Remember the values of 26 and 22.
Sub
net
Network
Address
Subnet mask
0
209.22.54.0 255.255.255.252
1
209.22.54.0 255.255.255. 252
2
209.22.54.0 255.255.255. 252
3
209.22.54.0 255.255.255. 252
Range of possible
Host IP Addresses
Subnetwork Address
Stop here...
5.
How many subnets would there be with a mask of 255.255.255.252? __________
6.
How many of them would be usable? __________
7.
How many host addresses per subnet? ________
8. How many of them would be usable? __________
END | THREE-HOLE PUNCH | STAPLE | SUBMIT
3