Transmission System & Packet Switching

Packet switching means a file (text, image, video, etc) are diced up and packaged into different packets. Each packet travels its own path to the destination computer where all the packets are unpacked and reassembled. Packet switching send and receives data as needed.

For example, VoIP uses packet switching, which breaks the conversation into small packets of data and then transmits that data over the Internet.

There are couple characteristics for packet switching: (1) no physical path (2) packets travel independently (3)does not reserve (4) no bandwidth wastage (5) support store and forward transmission.

Circuit Switching means when two nodes communicate with each other over a dedicated communication path. Here is a video discussing the differences between circuit switching and packet switching.

Have you ever wondered how to access Internet? For students and employees, they can access through the organization’s local area networks (LAN) or through their own personal computers. But there are many other ways for people to access Internet, for example, people can access the Internet through Internet Service Provider (ISP), such as Verizon.

Here are some examples related to lined communications: (1) DSL: Services also use your phone line, but you can still get and place phone calls. DSL is much faster than dial-up, and you do not need to connect every time you want to use the internet. (2)Cable: A technology that provides digital data transmission over cable TV infrastructure. (3) Fiber optic: Use small, flexible strands of glass to allows data to be sent faster over greater distances.


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I’m Chenyi Li, a senior student at Fox School of Business, majoring in Actuarial Science and minoring in Statistics. I love traveling and watching movies. One fact about me: Saturday night is my movie night:)