Ip Addressing & Sub Netting
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- Words: 447
- Pages: 9
7 October University th
Faculty Of Information Technology IP Addressing & Subnetting prepared by:
1.Ahmed Abdu.alrrahman. 2.Ahmed Algobbi. 3.Abdulfattah Hadeed. Supervised by: Mr. Ali Erfaida.
6-jan-2009
1
IP Address Classes
IP addresses are divided into 5 classes, each of which is designated with the alphabetic letters A to E. Class D addresses are used for multicasting. Class E addresses are reserved for testing & some mysterious future use.
6-jan-2009
2
...(IP
Address Classes
(Cont
The 5 IP classes are split up based on the value in the 1st octet:
6-jan-2009
3
...(IP
Address Classes
(Cont
Using the ranges, you can determine the class of an address from its 1st octet value. For example to first octet: 1. 120 is a Class A address. 2. 155 is a Class B address. 3. 220 is a Class C address.
6-jan-2009
4
...(IP
Address Classes
(Cont
The 32 bits of the IP address are divided into Network & Host portions, such as: Network & Host Representation By IP Address Class Class
Octet1
Octet2
Octet3
Octet4
Class A
Network
Host
Host
Host
Class B
Network
Network
Host
Host
Class C
Network
Network
Network
Host
6-jan-2009
5
Class A Addresses
Class A
0NNNNNNN.HHHHHHHH.HHHHHHHH.HHHHHHHH
(126.37.88.202)
0 in the first bit of the first octet indicates a Class A IP address. Class A contain of 126 network addresses (from1 to127) Using our formula, (27 – 2), there can be 126 Class A Networks. Number of hosts: 224 -2 = 16,777,214
6-jan-2009
6
Class B IP Addresses
Class B
10 NNNNNN.NNNNNNNN.HHHHHHHH.HHHHHHHH
10 in the first two bits of the first octet indicates a Class B IP address. Class B contain of 16,382 network addresses (from128 to191).
(189.199.6.38)
Using our formula, (214 – 2), there can be 16,382 Class B Networks.
Number of hosts: 216 - 2 = 65,534
6-jan-2009
7
Class C IP Addresses
Class C
(192.153.186.26)
110NNNNN.NNNNNNNN.NNNNNNNN.HHHHHHHH.
110 in the first three bits of the first octet indicates a Class C IP address. Class C contain of 2,097,150 network addresses (from192 to223).
Using our formula, (221 – 2), there can be 2,097,150 Class C Networks. Number of hosts: 28 - 2 = 254 6-jan-2009
8
Addresses classes class
1thOctet DecimalRange
1thOctetHigh OrderBits
Network/host ID (N=Network .H=Host
Default Subnet Mask
Number Of Networks
Hosts Per Network (Usable (Addresses
A
126 – 1
0
N.H.H.H
255.0.0.0
(2- 27)=126
22)=16.777.214 (2- 4
B
191 - 128
10
N.N.H.H
255.255.0.0
=16.382
=65.534
(2- 214 )
(2- 216 )
C
223 - 192
=2.097.150
=254
(2- 221 )
(2- 28)
110
N.N.N.H
255.255.255.0
6-jan-2009
9
Faculty Of Information Technology IP Addressing & Subnetting prepared by:
1.Ahmed Abdu.alrrahman. 2.Ahmed Algobbi. 3.Abdulfattah Hadeed. Supervised by: Mr. Ali Erfaida.
6-jan-2009
1
IP Address Classes
IP addresses are divided into 5 classes, each of which is designated with the alphabetic letters A to E. Class D addresses are used for multicasting. Class E addresses are reserved for testing & some mysterious future use.
6-jan-2009
2
...(IP
Address Classes
(Cont
The 5 IP classes are split up based on the value in the 1st octet:
6-jan-2009
3
...(IP
Address Classes
(Cont
Using the ranges, you can determine the class of an address from its 1st octet value. For example to first octet: 1. 120 is a Class A address. 2. 155 is a Class B address. 3. 220 is a Class C address.
6-jan-2009
4
...(IP
Address Classes
(Cont
The 32 bits of the IP address are divided into Network & Host portions, such as: Network & Host Representation By IP Address Class Class
Octet1
Octet2
Octet3
Octet4
Class A
Network
Host
Host
Host
Class B
Network
Network
Host
Host
Class C
Network
Network
Network
Host
6-jan-2009
5
Class A Addresses
Class A
0NNNNNNN.HHHHHHHH.HHHHHHHH.HHHHHHHH
(126.37.88.202)
0 in the first bit of the first octet indicates a Class A IP address. Class A contain of 126 network addresses (from1 to127) Using our formula, (27 – 2), there can be 126 Class A Networks. Number of hosts: 224 -2 = 16,777,214
6-jan-2009
6
Class B IP Addresses
Class B
10 NNNNNN.NNNNNNNN.HHHHHHHH.HHHHHHHH
10 in the first two bits of the first octet indicates a Class B IP address. Class B contain of 16,382 network addresses (from128 to191).
(189.199.6.38)
Using our formula, (214 – 2), there can be 16,382 Class B Networks.
Number of hosts: 216 - 2 = 65,534
6-jan-2009
7
Class C IP Addresses
Class C
(192.153.186.26)
110NNNNN.NNNNNNNN.NNNNNNNN.HHHHHHHH.
110 in the first three bits of the first octet indicates a Class C IP address. Class C contain of 2,097,150 network addresses (from192 to223).
Using our formula, (221 – 2), there can be 2,097,150 Class C Networks. Number of hosts: 28 - 2 = 254 6-jan-2009
8
Addresses classes class
1thOctet DecimalRange
1thOctetHigh OrderBits
Network/host ID (N=Network .H=Host
Default Subnet Mask
Number Of Networks
Hosts Per Network (Usable (Addresses
A
126 – 1
0
N.H.H.H
255.0.0.0
(2- 27)=126
22)=16.777.214 (2- 4
B
191 - 128
10
N.N.H.H
255.255.0.0
=16.382
=65.534
(2- 214 )
(2- 216 )
C
223 - 192
=2.097.150
=254
(2- 221 )
(2- 28)
110
N.N.N.H
255.255.255.0
6-jan-2009
9
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