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TCP/IP and Subnet Masking

Level: Intermediate Date Created: November 19, 2010 Length of Class: 69 Minutes Tracks Networking Prerequisites Introduction to Networking Purpose of Class This class teaches students about the components and concepts in a TCP/IP network. Chapters TCP/IP Overview (2:32) How TCP/IP Works (16:53) TCP/IP Numbering (43:00) Subnet Masking (48:17) Final Thoughts (64:03) Class Notes 1. TCP/IP Is technically a Protcol Suite IP Routes Traffic Layer 3 OSI Model Network Routable Networks (sub networks) TCP controls transmission between connected systems Layer 4 OSI Model Transport Windowing is the process of sending data from one computer to another in TCP/IP version 4 2. How TCP/IP Works IP Addresses -- Every device on a TCP/IP network needs an individual IP Address DNS (Domain Name Service/Server) resolves Domain names into IP Addreses DHCP (Dynamic Host Control Protcol) Servers automatically assign IP information to clients for a specific time period (Lease). Clients try to renew leases at 50% expiration point. Default Gateway (Router) connects networks. If an IP Address cannot be found on the local network the computer tries to use the Default Gateway to find the target. Subnets and Subnet Masking -- Subnets are individual networks. Subnet Masks divide IP Addresses in Subnet Number and Host Number What the Number Mean IP Addresses and Subnet Masks are made of 4 Octets of Bits 128-64-32-16-8-4-2-1 Subnet Masking IP Addresses contain the Subnet Number and Host Number. The Subnet Mask tells you where the subnet number ends and the host number begins. Classful Networks A, B, C,D,E Gone now use CIDR The Highest Address in a Subnet Range is the Broadcast address To determine the number of subnets (n is the number of bits used)= 2n To determine number of Hosts = 2n -2