Δίκτυα και Επικοινωνίες

24 Οκτ 2013 (πριν από 4 χρόνια και 8 μήνες)

104 εμφανίσεις

&
Subnetting
!!!

Look at me!!!

Know me!!!

Memorize me!!!

126

16,384

2,097,152

16,777,
214

65,534

254

Let’s Play!!

192.168.1.10

Class:

Binary Equivalent:

Subnet

Let’s Play!!

192.168.1.10 /24

Class:

C

Binary Equivalent:

11000000.10101000.00000001.00001010

Subnet

255.255.255.0

Practice
-
Binary:

213.45.37.123

192.167.24.64

17.32.193.250

What classes do they belong to?

Practice
-

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.
0
0000000

Now you try:

/28

Magic Number:

Now you try:

/28

255.255.255.240

11111111.11111111.11111111.1111
0
000

Magic Number:

Why is this important?

/28

255.255.255.240

11111111.11111111.11111111.1111
0
000

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
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
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 number of total subnets

The number of available hosts per subnet

The valid range of host addresses for the first four
subnets

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

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

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 number of total subnets

The number of available hosts per subnet

The valid range of host addresses for the first four
subnets

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

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

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 /29

You require at least 6 subnets. List:

The number of total subnets

The number of available hosts per subnet

The valid range of host addresses for the first four
subnets

You have been given the IP address 10.1.5.10 /21

You 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

You have been given the IP address 10.1.5.10 /21

You 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

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