When was the Internet first created, where and why?
The internet was first invented by computer scientists Vinton Cerf and Bob Kahn in the 1960s for military purposes, and then expanded to the purpose of communication among scientists.
Who founded the World Wide Web?
The World Wide Web was founded by British scientist Tim Berners-Lee in 1989. For more information on him, go to this website: Tim Berners-Lee
Compare the difference between the Internet and the World Wide Web.
The Internet is a global system of interconnected computer networks, whereas the World Wide Web is a global collection of documents and other resources you see online, linked by hyperlinks and URLs.
What types of computer networks exist?
There are many types of computer networks, including:
To read more, visit this website: Types of Computer Networks Explained
What technologies can be used to make the connections?
Network technologies, Bluetooth, the Internet, cables, fiber optics, DSL and Broadband are all examples of types of technology that can be used to make connections.
Explain IP addresses and why IPv6 exists now. How many possible IPv4 addresses are there?
An IP address is a string of numbers separated by periods. They are expressed as a set of four numbers — an example IP address might be 188.102. 1.25. Each number in the set can range from 0 to 255. IPv6 exists today to allow for more unique TCP/IP address identifiers to be created, since we have run out of the 4.3 billion created with IPv4. There are 4,294,967,296 IPv4 addresses in total, which is significantly less than the number of IPv6 addresses.
What is a static IP address and what devices get these?
A static IP address is an IP address assigned to a computer that doesn't change. This number is in the form of a dotted quad and is typically provided by an internet service provider (ISP). Static IP addresses are typically used by devices that need constant access, such as buisnesses that host their own websites or internet services.
What is a dynamic IP address? Why do these exist? How are they assigned?
A dynamic IP address is an IP address that an ISP lets you use temporarily. We use dynamic addresses because IPv4 doesn't provide enough static IP addresses to go around. Dynamic addresses are assigned, as needed, by Dynamic Host Configuration Protocol (DHCP) servers.
Explain what packets are and how they are routed through the internet.
A packet is a formatted unit of data carried by a packet-switched network. A packet consists of control information and user data; the latter is also known as the payload. The information used to get packets to their destinations are contained in routing tables kept by each router connected to the Internet. Routers are packet switches. A router is usually connected between networks to route packets between them. Each router knows about it's sub-networks and which IP addresses they use.
What is the difference between UDP vs TCP protocols and how are they used?
TCP is a connection-oriented protocol, whereas UDP is a connectionless protocol. A key difference between TCP and UDP is speed, as TCP is comparatively slower than UDP. TCP provides apps a way to deliver (and receive) an ordered and error-checked stream of information packets over the network. UDP is used by apps to deliver a faster stream of information by doing away with error-checking.
Explain HTTP and HTTPS.
HTTP is a protocol which allows the fetching of resources, such as HTML documents. HTTPS stands for Hyper Text Transfer Protocol Secure, it is a combination of SSL/TLS protocol and HTTP. It provides encrypted and secure identification of a network server.
What is a DNS?
DNS stands for Domain Name System. The role of DNS is to translate domain names into IP Addresses, which computers can understand.
