OCR Raspberry Pi Getting Started Tutorials
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Basic Networking
Computer networks are made up of a group of computers or devices. Each
computer requires a unique address in order to know where to send data to.
When a letter is sent in the post it will contain the name of the person, the
house number and the area they are located in. This is the same when data is
sent over the internet. An example of an address looks like this:
192.168.100.1
This type of internet addressing is called IPv4 and stands for Internet Protocol
version 4. The problem with IPv4 has become clear since more and more
devices are being connected to the internet. Each device that connects to the
internet needs an address and IPv4 has a limited amount of addresses available.
The answer to this was to create a new version called IPv6 which allows for more
devices to be connected. An example of IPv6 looks like this:
2001:0db8:85a3:0042:0000:8a2e:0370:7334
A network consists of client computers and servers each having a unique
internet address. Clients will request information from the server and the server
returns this information. When you are visiting a web site your web browser is
the client and the web site host is the server. When a client asks the server for
this information it is called a
client request
.
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