Digital information is transmitted via binary data or bits over networks. This information is transmitted by electricity, light or radio waves. The rate and speed information can be transmitted is measured using bandwidth, bit rate, and latency.
- Transmitting digital information…in the form of states of on or off or ones and zeros…can be done in a lot of different ways.…There are three that you'll encounter…whenever you connect to the internet…or to any type of network,…radio, electrical, and optical.…Let's start with radio.…Most homes and offices use Wi-Fi to connect to networks…and to the internet.…Wi-Fi networks are based on radio waves…that transmit binary states…based on alternating the radio waves that send information.…
By encoding information into binary data,…it is then translated into these varying radio waves…and can be transmitted, received,…and converted back to binary data,…and decoded into its original format.…Wi-Fi and radio communications are great…for short distances.…But as you know, if you take your laptop or device…far away from a hotspot,…your signal gets weaker and weaker until, at some point,…it isn't strong enough to reliably send information.…Radio can also be noisy.…
When you have one hotspot,…transmissions don't encounter much interference,…
This course is the first in our Computer Science Principles series, designed around the AP Computer Science Principles (CSP) curriculum. It is a great foundation for anyone, at any age, to prepare for careers in technology and computer science. Lessons in this segment cover the building blocks of computing: binary logic, number systems, text and image encoding, compression, and simple communication protocols. Understanding these basics will help you understand the interplay between hardware, software, data, networks, and the people that use them.
- Binary and bits
- Digital communication
- Number systems
- Encoding text
- Compressing text and images