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Introduction to Networking ( Yarnfield )

Introduction to Networking ( Yarnfield ). Classful subnetting. Objective. To cover the subnetting process Be able to subnet from a variety of information. Subnetting.

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Introduction to Networking ( Yarnfield )

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  1. Introduction to Networking(Yarnfield) Classfulsubnetting

  2. Objective • To cover the subnetting process • Be able to subnet from a variety of information

  3. Subnetting • The process of dividing a network up into subnets and to assign each subnet a valid network IP address, and the hosts on that subnet valid IP addresses Subnet 2 Subnet 1 Subnet 3

  4. We need to find out • How many subnets does the subnet mask provide? • How many valid hosts per subnet are available? • What are the valid subnets? • What is the broadcast address of each subnet? • What are the valid hosts in each subnet?

  5. We need • An IP address to subnet And • The number of subnets we wish to make Or • The subnet mask Or • The number of borrowed bits

  6. Example 192.5.5.35 255.255.255.224

  7. Example • IP address: 192.5.5.35 • Subnet mask: 255.255.255.224 • Work out • Network ID Class • Major network address • Major broadcast address • First host of the major network • Last host of the major network Class C 192.5.5.0 192.5.5.255 192.5.5.1 192.5.5.254

  8. Example • IP address: 192.5.5.35 • Subnet mask: 255.255.255.224 • Now we need to work out the subnet information • Number of subnet bits • Number of host bits • Subnet address for the given host IP address • Range of host addresses for this subnet • Broadcast address for this subnet 3 subnet bits 5 host bits 192.5.5.32 192.5.5.33 – 192.5.5.62 192.5.5.63

  9. Example • IP address: 192.5.5.35 • Subnet mask: 255.255.255.224 • Now we need to find other subnet information • Total number of useable subnets • Number of valid host IP addresses per subnet • Convert given subnet mask to binary • Convert given host IP address to binary • Subnetwork address with slash (/) mask for the assigned subnet 6 30 11111111.11111111.11111111.11100000 11000000.00000101.00000101.00100011 192.5.5.32 / 27

  10. Exercise • IP address 202.168.2.40 • Subnet mask 255.255.255.240 • Find out: • Network ID Class • Major network address • Major broadcast address • First host of the major network • Last host of the major network • Number of subnet bits • Number of host bits • Subnet address for the given host IP address • Range of host addresses for this subnet • Broadcast address for this subnet • Total number of useable subnets • Number of valid host IP addresses per subnet • Convert given subnet mask to binary • Convert given host IP address to binary • Subnetwork address with slash (/) mask for the assigned subnet

  11. Questions... • ... are there any?

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