CNT 4713 Lecture Notes - Lecture 1: Transmission Control Protocol, Packet Switching, End System
Document Summary
The internet is a computer network that interconnects hundreds of millions of computing devices throughout the world. Pc, server, wireless laptop, smartphone millions of connected. Those end systems are connected by network of communication links & packet switches. Links transmits data at different at different rates. End system : laptops, smartphones, tvs =hosts = device connected to internet. Communication links : copper wire, radio systems, fiber, satellite. Data is sent in packages and then reassembled once received entirely. The data forwarding is also called packet switches most know are routers and link-layer switches. End systems access internet through isp (internet service providers. ) End systems, packet switches run protocols (2 very important protocols are transmission control protocol tcp and internet protocol ip ) Tcp checks for congestion if congested, slow down traffic. Packet switches : forward packets; chunk of data. (routers) and data arrives in random order. Transmission rate: bandwidth (in bits per sec)
