Check out this video to learn more about Bandwidth:
Overview of Video:
Bandwidth is a frequency range over which a signal spans itself and measured in hertz. Another definition is data transmitted per unit time which is measured in bits per second or megabits per second. As bandwidth increases the speed of your connection also increases. Bandwidth is inversely related to the range, which means as the bandwidth increases the range decreases. The electromagnetic bandwidth can be used in two different ways, baseband and broadband. Baseband is used for ethernet connections and uses very low frequency waves which deteriorate over long distances. Broadband is used for TV transmits and uses high frequency waves which can travel over long distances. Basebands allows you either recieve or send a signal, but not both at the same time. Broadband allows you to both send and receive signals at the same time.
Check out this link to learn more about Circuit Switching and Packet Switching:
Overview of Video:
Circuit switching is the method used by old traditional telephone calls. It is a type of switching where a dedicated channel or circuit is established for the duration of communication. Circuit switching is carried over the public switched telephone network, also known as (PSTN) or (POTS). The PSTN is connected through different central “offices”, which act as telephone exchanges. When you use PSTN you are actually renting the telephone lines. Circuit switched networks are ideal for communications which require data to be transmitted in real time and are normally used for traditional telephone calls.
Packet switching networks normally handle digital data and are connected through many routers. Data is broken into packets before it is transported. Packets do not need to arrive in sequence and can travel any path because they have an IP address and sequencing information. Packet switched networks are more flexible and more efficient.
In my previous post I mentioned bits, binary digits, and how they are represented by 0 and 1s. in this post I am going to talk more in depth about how 0 and 1s are transformed in a computer. In the computer there are circuits that have Transistor in them that act as switches. The circuits act as logic gates and determine where a signal is being sent. The 5 different logic gates that could be used are and, or, not, nand and nor. Transistors only have two signals. High is represented as a 1 and is ideally measured at 5.00 volts. Low is represented as a 0 and is ideally measured at 0.00 Volts. To read the circuits and understand what signal Is being sent when there is a table called Truth Table. The truth table is from a mathematical logic called Boolean Algebra. This is a division of mathematics which incorporates the binary variables, 0 and 1, and variables are the truth values true and false.
To Learn More About Boolean Algebra check out this video: https://www.youtube.com/watch?v=JqhaPnJGe7g
Computers seem like very complex machines from the outside but when they are actually broken down are pretty simple. Computers are digital processors that store and process information that comes in discrete chunks and take on discrete values. Data from the outside world is converted into digital data because it is easy for computers to work with. These values are called bits and bytes. A bit is a binary digit, which is either a 0 or 1. A Byte is a group of 8 bits. The bytes represent larger things being stored.
Check out this video to learn more about Bits and Bytes
Computers have been evolving rapidly throughout history but still contain the same basic components. These basic components are called Von Neumann Architecture. Von Neumann Architecture contains RAM, CPU and hard disks, which are all connected to a wire, called the bus, which transmits. The RAM is what stores information that is in active use by the processor and other parts of the computer. The CPU is the brain of the computer and hard disks are secondary storage that hold information when power is turned off. The evolving of the computer has been measured by a guideline that was created called Moore’s Law. Moore’s Law is not nature but a guideline that the semiconductor industry has used to set targets.
Check out this video explaining more about Von Neumann Architecture:
Hi! My name is Hannah Muller, I am currently a senior at Temple University studying marketing. I have created this website for one of my classes and I am very excited to personalize it. The class is called Digital Technology 2020 and was created to inform people on how technology really works. Most of us use technology everyday and are unaware of what is really happening behind the screen. This website is where I will be blogging what I learn and I hope you too can learn from it!