IP Addressing& Subnetting!!!

Look at me!!!

Know me!!!

Memorize me!!!

126 16,384 2,097,152

16,777,214

65,534 254

Let’s Play!!

IP Address: 192.168.1.10

Class:

Binary Equivalent:

Subnet Mask:

Let’s Play!!

IP Address: 192.168.1.10 /24

Class: C

Binary Equivalent: 11000000.10101000.00000001.00001010

Subnet Mask: 255.255.255.0

Practice-Binary:

Translate these addresses into binary:

213.45.37.123

192.167.24.64

17.32.193.250

What classes do they belong to?

Practice- Binary:

Translate these addresses into binary:

213.45.37.123: 11010101.00101101.00100101.01111011

192.167.24.64: 11000000.10100111.00011000.01000000

17.32.193.250: 00010001.00100000.11000001.11111010

What classes do they belong to?

C, C, A

Magic Number:

In binary, which bit of the subnet mask (left to right) switches from 1’s to 0’s?

Ex: /24: 255.255.255.0 11111111.11111111.11111111.00000000

Now you try:

/28

Magic Number:

Now you try:

/28

255.255.255.240

11111111.11111111.11111111.11110000

Magic Number:

Why is this important? /28

255.255.255.240

11111111.11111111.11111111.11110000

Subtract the value of that octet from 256. 11110000=240

256-240= 16

Calculate the multiples of your magic number (16) from 0 up to 256 0

16

32

48

64…etc

Find the multiple of the magic number that is closest to but no greater than the IP address’s interesting octet value

0

16

32

48

64

80

96

112

128

144

160

176

192

208

224

240

*interesting octet is the octet in which the 1’s change to 0’s

Find the multiple of the magic number that is closest to but no greater than the IP address’s interesting octet value

0

16

32

48

64

80

96

112

128

144

160

176

192

208

224

240

*interesting octet is the octet in which the 1’s change to 0’s

Practice-Subnetting:

You have been given the IP address 213.45.37.0 /24 You require at least 15 subnets. List:

The required subnet mask

The number of total subnets

The number of available hosts per subnet

The first four subnet addresses

The valid range of host addresses for the first four subnets

The Broadcast address for each subnet

Practice-Subnetting:

You have been given the IP address 213.45.37.0 /24 You require at least 15 subnets. List:

The required subnet mask: 255.255.255.240 (/28)

The number of total subnets: 16

The number of available hosts per subnet: 14

The first four subnet addresses: 213.45.37.0

213.45.37.16

213.45.37.32

213.45.37.48

The valid range of host addresses for the first four subnets 213.45.37.1 - 14

213.45.37.17 - 30

213.45.37.33 - 46

213.45.37.49 - 62

The Broadcast address for each subnet 213.45.37.15

213.45.37.31

213.45.37.47

213.45.37.63

You have been given the IP address 200.100.50.0 /24 You require at least 3 subnets. List:

The required subnet mask

The number of total subnets

The number of available hosts per subnet

The first four subnet addresses

The valid range of host addresses for the first four subnets

The Broadcast address for each subnet

You have been given the IP address 200.100.50.0 /24 You require at least 3 subnets. List:

The required subnet mask: /26: 255.255.255.192

The number of total subnets: 4

The number of available hosts per subnet: 62

The first four subnet addresses: 200.100.50.0

200.100.50.64

200.100.50.128

200.100.50.192

The valid range of host addresses for the first four subnets 200.100.50.1-62

200.100.50.65-126

200.100.50.129-190

200.100.50.193-254

The Broadcast address for each subnet 200.100.50.63

200.100.50.127

200.100.50.191

200.100.50.255

You have been given the IP address 10.1.5.10 /29You require at least 6 subnets. List:

The required subnet mask

The number of total subnets

The number of available hosts per subnet

The first four subnet addresses

The valid range of host addresses for the first four subnets

The Broadcast address for each subnet

You have been given the IP address 10.1.5.10 /21You require at least 6 subnets.

What subnet mask should you use?

You have a host at the address of 10.1.5.120 that is experiencing issues. In order to troubleshoot, what is the address of that subnet?

You have been given the IP address 10.1.5.10 /21You require at least 6 subnets.

What subnet mask should you use? /21: 255.255.248.0

You have a host at the address of 10.1.5.120 that is experiencing issues. In order to troubleshoot, what is the address of that subnet? 10.1.5.0

10.5.10.200 /26

You need to have no more than 25 hosts in each subnet.

Go.

Subnets: 10.5.10.192

10.5.10.224

Ranges: 10.5.10.193 – 222

10.5.10.225 – 254

Broadcast: 10.5.10.223

10.5.10.255