Level: Intermediate. Presenter: Eli the Computer Guy. 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. 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. 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.