CIDR amp SUBNETTING PHILLIP LAFLEUR NATHAN GRAMMES JONATHAN BENNETT 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE STEP 1 CONNECT A BUNCH OF COMPUTERS STEP 2 DEVELOP ADDRESS SYSTEM ID: 622560
Download Presentation The PPT/PDF document "CLASSLESS INTER-DOMAIN ROUTING" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
CLASSLESS INTER-DOMAIN ROUTING
{CIDR
}
& SUBNETTING
PHILLIP LAFLEUR
NATHAN GRAMMES
JONATHAN BENNETTSlide2
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURE
STEP 1: CONNECT A BUNCH OF COMPUTERS
STEP 2: DEVELOP ADDRESS SYSTEM
Internet Protocol (IP) AddressSlide3
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURE
192 . 168 . 5 . 130
11000000.10101000.00000101.10000010
BIT CONVERTERSlide4
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURE
11000000.10101000.00000101.10000010
Octet
Octet
Octet
Octet
32 BitsSlide5
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURE
STEP 1: CONNECT A BUNCH OF COMPUTERS
STEP 2: DEVELOP ADDRESS SYSTEM
Internet Protocol (IP) Address
STEP 3: ASSIGN IP ADDRESSES
?Slide6
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURE
The
CLASSFUL NETWORK (ABRIDGED)A
B C
17 MILLION
65 THOUSAND
254
Assigned based on 3 classes
,, representing available hosts
What if you only need 3,000?
C
C
C
C
C
C
C
C
C
C
C
C
Cluttered routing table.
B
Waste 62,000+ addresses!Slide7
70.
0.0.0
70.1.0.0
70.2.0.0
70.3.0.0
70.4.0.0
The
CLASSFUL NETWORK
(ABRIDGED)
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURESlide8
70.5.0.0
70.6.0.0
70.7.0.0
70.8.0.0
70.9.0.0
70.10.0.0
70.11.0.0
70.12.0.0
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURESlide9
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURE
Available IP’s exhausted after 254 assignments of Class B.
PROBLEMSlide10
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURE
INTERNET ENGINEERING TASK FORCESlide11
0.0.0.130
255.255.255.0
192.168.5
0.0.0.130192.168.5.130
HOST NUMBER
SUBNETNETWORK PREFIX
HOST NUMBER
IP ADDRESS
1993
CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING
The
SOLUTION
(UNABRIDGED)
SUBNETTING
Let’s just divide our network into
MANAGABLE
bits.Slide12
1993
CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING
The
SOLUTION (UNABRIDGED)SUBNETTING
Let’s just divide our network into MANAGABLE bits.
192.168.5.00.0.0.130
255.255.255.0
192.168.5.130
Designates network prefix
255 = Entire Octet (0 – 254)
or (in binary)
Leading 1s and trailing 0sSlide13
1993
CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING
The
SOLUTION (UNABRIDGED)SUBNETTING
Network prefix and host suffix can be found with binary operation AND.
11000000.10101000.00000101.0000000000000000.00000000.00000000.10000010
11111111.11111111.11111111.00000000
11000000.10101000.00000101.10000010
AND
IP Address
Subnet Mask
Network Prefix
Host Number
1 AND 0 = 0
0 AND 0 = 0
1
AND 1 = 1Slide14
1993
CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING
The
SOLUTION (UNABRIDGED)CIDR+SUBNETTING
CIDR represents the notation in which subnetting is represented.
IP / INITIAL BITS192.168.5.130 / 2411000000.10101000.00000101.10000010
192 . 168 . 5
. 130Slide15
1993
CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING
The
SOLUTION (UNABRIDGED)
0 1 0 0 0 1 1 0 . 0 0 0 0 0 0 0 1 . 0 0 0 0 0 0 0 0 . 0 0 0 0 0 0 0 0
70.1.0.0
/ 23
70.1.0.0 – 70.1.1.254
510 HostsSlide16
1993
CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING
The
SOLUTION (UNABRIDGED)
0 1 0 0 0 1 1 0 . 0 0 0 0 0 0 0 1 . 0 0 0 0 0 0 0 0 . 0 0 0 0 0 0 0 0
70.1.0.0
/ 22
70.1.0.0 – 70.1.3.254
1020 HostsSlide17
1993
CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING
The
SOLUTION (UNABRIDGED)
0 1 0 0 0 1 1 0 . 0 0 0 0 0 0 0 1 . 0 0 0 0 0 0 0 0 . 0 0 0 0 0 0 0 0
70.1.0.0
/ 21
70.1.0.0 – 70.1.7.254
2046 HostsSlide18
1993
CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING
The
SOLUTION (UNABRIDGED)IMPLICATIONS
70.
0.0.0
70.1.15.0
/
22
70.1.16.0 / 12
70.1.16.0
/
15
70.1.12.0
/
16Slide19
1981
CLASSFUL NETWORK ADDRESSING ARCHITECTURE
IP ‘division’ via
subnetting
allows for specific distribution of IPs
AWESOME