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TCP/IP and Subnet Masking



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Level: Intermediate
Date Created: November 19, 2010
Length of Class: 69 Minutes


Introduction to Networking
Purpose of Class

This class teaches students about the components and concepts in a TCP/IP network.

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

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
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