Internet and Networking

Packet Switching The breaking down of files into small pieces of information Each packet is transmitted separately from Point A to Point B Each packet MUST have these three components: Who the sender is Who the receiver is The order in which to put the packets back together If a system doesn't receive acknowledgement that the packet was received, it resends the pacet The internet is scaleable using packet switching

Network Definition consists of physical components that are used to move data from one place to another two devices or more are connected for the purpose of sharing data

OSI Model The Open System Interconnection Model defines a networking framework for implementing protocols in 7 layers Control is passed from one layer to the next as data is moved through the network MAC address is used and is different for each computer. It is a way of how the internet locates your device.

Network Cabling Fiber optic cables uses light to transfer data Coaxial cable physically transfers data to computer A ethernet cable connects devices through physical wires

IP Addresses Used to indicate source and destination on the internet Made of 32 bits Written in dotted decimal format in a hierarchical structure Temporary address based on location of the computer

Protocols Guidelines for the hardware to send data and receive data The Domain Name System allows the user not to remember different IP Addresses for webpages IPv6 has 128 bits which allow many more hosts

Devices and Number Bases Devices are electronic items that take input and output Many devices are now connected through the internet and other networks The higher the number base means higher capacity