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ip address

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  • 1. Router: • It is an internetworking device used to connect two or more different networks • It works on layer 3 i.e. network layer • .It Performs Routing • ROUTING:- Forwarding packets from one network to another network choosing the best path is called routing.
  • 2. 1.1.1.1/8 S0 HYD E0 10.1.1.1/8 LAN – 10.0.0.0/24 S1 1.1.1.2/8 KSA E0 20.1.1.1/24 LAN – 20.0.0.0/24
  • 3. • HUB It is generally used to connect all devices on a network so that they can communicate with each other. It always do broadcasting. • Switch Like Hub, it is also used to connect all devices on a network so that they can communicate with each other. But first time it will do broadcast and from second time onwards it will do unicast.
  • 4. What is TCP/IP? • TCP/IP is a standard language like English used by computers and network devices for communication • TCP/IP is a universal standard and can make communication possible among all operation system
  • 5. IP ADDRESS • IP Address is Logical Address • It is a Network Layer address (Layer 3) • Two Versions of IP: – IP version 4 is a 32 bit address – IP version 6 is a 128 bit address
  • 6. IP version 4 Bit is represent by 0 or 1 (i.e. Binary) IP address in binary form (32 bits): 01010101000001011011111100000001 32 bits are divided into 4 Octets: 01010101. 00000101. 10111111. 00000001 IP address in decimal form: 85.5.191.1
  • 7. IP version 6 • 128-bit address is divided along 16-bit boundaries, and each 16-bit block is converted to a 4-digit hexadecimal number and separated by colons (Colon-Hex Notation) FEDC:BA98:7654:3210:FEDC:BA98:7654:3210
  • 8. Binary to Decimal Conversion Taking Example for First Octet : Total 8 bits, Value will be 0’s and 1’s i.e. 28 = 256 combination Total IP Address Range 0.0.0.0 to 255.255.255.255
  • 9. IP Address Classification • IP Addresses are divided into 5 Classes • CLASS A • CLASS B Used in LAN & WAN • CLASS C • CLASS D • CLASS E Reserved for Multicasting Reserved for Research & Development
  • 10. Class Ranges CLASS A Range 0.0.0.0 - 127.255.255.255 CLASS B Range 128.0.0.0 - 191.255.255.255 CLASS C Range 192.0.0.0 - 223.255.255.255 CLASS D Range 224.0.0.0 - 239.255.255.255 CLASS E Range 240.0.0.0 - 255.255.255.255
  • 11. Octet Format • IP address is divided into Network & Host Portion • CLASS A is written as N.H.H.H • CLASS B is written as N.N.H.H • CLASS C is written as N.N.N.H
  • 12. No. Networks & Hosts • CLASS A – 126 Networks & 16777214 Hosts per Network • CLASS B – 16384 Networks & 65534 Hosts per Network • CLASS C – 2097152 Networks & 254 Hosts per Network
  • 13. Network & Broadcast Address • The network address is represented with all bits as ZERO in the host portion of the address • The broadcast address is represented with all bits as ONES in the host portion of the address • Valid IP Addresses lie between the Network Address and the Broadcast Address. • Only Valid IP Addresses are assigned to hosts/clients
  • 14. Example - Class A Class A 10.0.0.0 10.0.0.1 10.0.0.2 10.0.0.3 10.255.255.254 10.255.255.255 Network Address Valid IP Addresses Broadcast Address
  • 15. Example - Class B Class B 172.16.0.0 172.16.0.1 172.16.0.2 172.16.0.3 172.16.255.254 172.16.255.255 Network Address Valid IP Addresses Broadcast Address
  • 16. Example - Class C Class B 192.168.1.0 192.168.1.1 192.168.1.2 192.168.1.3 192.168.1.4 192.168.1.5 192.168.1.6 192.168.1.255 Network Address Valid IP Addresses Broadcast Address
  • 17. Private IP Address • There are certain addresses in each class of IP address that are reserved for Private Networks. These addresses are called private addresses. Class A 10.0.0.0 to 10.255.255.255 Class B 172.16.0.0 to 172.31.255.255 Class C 192.168.0.0 to 192.168.255.255
  • 18. Subnet Mask Subnet Mask:-Its an address used to identify the network and host portion of the ip address Class A Class B Class C N.H.H.H N.N.H.H N.N.N.H 255.0.0.0 255.255.0.0 255.255.255.0 Note:- "255" represents the network and "0" represents host.
  • 19. • Network:- collection / group hosts • Host:- Single PC/ computer. • Default Gateway:– Its an entry and exit point of the network. – ex:- The ip address of the router ethernet address.
  • 20. Subnetting • Dividing a Single Network into Multiple Networks. • Converting Host bits into Network Bits i.e. Converting 0’s into 1’s • Subnetting can be perform in two ways. – FLSM (Fixed Length Subnet Mask) – VLSM (Variable Length subnet mask) • Subnetting can be done based on requirement . – Requirement of Hosts ? 2h - 2 >= requirement – Requirement of Networks ? 2n >= requirement
  • 21. What is Supernetting or CIDR? • Classless Inter-Domain Routing (CIDR) merges or combine network addresses of same class into one single address to reduce the size of the routing table. • It is done on core router to reduce the size of routing table. • It is implemented by ISP (internet service providers).