Chapter 2: E-commerce infrastructure & security: internet & World Wide Web Flashcards
Explain the concept of packet switching ? Why was it important as a building block for the internet ?
Packet switching is the concept of breaking down binary datastrings into packages in order send them to other devices more easily. The proces goes as follows:
- Linear text message
- Breakdown into binary code
- Breakdown into packages
- a binary string is attached that contains information indicating destination, how many bits are in the total message and how many packets.
It was an important development because before, computers were only able to connect one-to-one and not simultaneous. So if one computer was connected with another, a third wouldn’t be able to connect to any of the 2 first. Packet switching enabled this. Now, computers are able to connect with each other simultaneously, which pushed the internet development forward.
Explain the difference between the internet and the world wide web ?
The internet is the infrastructure used that enables the connection of multiple devices, while the world wide web is an internet application.
What are the major building blocks of the internet ? Explain ?
The major building blocks of the internet are:
- Client/Server computing: personal computers (clients) are connected in network with one or more servers that perform common functions for the clients such as storing files, software applications, …
- Packet switching
- TCP/IP communications protocol
Explain the components that represent the basic technology of the internet and the worldwide web!
The major building blocks of the internet are:
- Client/Server computing: personal computers (clients) are connected in network with one or more servers that perform common functions for the clients such as storing files, software applications, …
- Packet switching
- TCP/IP communications protocol
The world wide web also uses technology protocols such as:
- IP addresses
- Domain names: IP addresses expressed in natural language
- Uniform Resource Locator (URL): address used by web browser to identify location of certain content on the web.
- Hyper Text Transmision Protocol (HTTP): protocol for communication between client and server –> For the worldwide web, if hypertext is used in local networks (LANs) it is called intranet.
Other technologies that make the web work are:
- Browsers
- Servers
- Routers: connect Local Area Networks (LANs) and Wide Area Networks (WANs) to eachother.
- -> LAN are local and more restricted in geograpich distance, while WANs are networks of LANs
What is meant by TCP/IP ? Explain!
TCP = Establishes connections between sending and receiving web computers. Also handles assembly of packets at point of transmission, and reassembly at receiving end. IP = Set of digits that identifies a certain device on the internet. This is the internet's addressing scheme.
