1. The Internet
A global computer network providing a variety
of information and communication facilities,
consisting of interconnected networks using
standardized communication protocols. (1)Source)
2. Contents
•Domain Names and
IP Addresses
•Domain Names and IP Addresses:
The Link
•Data
Packets and
Packet
Switching
•Function of
Routers
•Sources
•Image Sources
3. Domain Names and IP Addresses
• Domain names: the part of a network
address which identifies it as belonging
to a particular domain. (3)source)
• IP Addresses: a unique string of
numbers separated by full stops that
identifies each computer using the
Internet Protocol to communicate over a
network. (4)source)
Actual Oxford Dictionary Definitions
4. Domain Names and IP Addresses
The Link
• An IP address which is made up of numbers (eg. 212.58.246.10) allows you to establish a link to
a network or device and get data from it.
• These numbers are not easy to remember and the above IP Address has a domain name label of
ww.BBC.co.uk.
• The domain name is a word or line which could be a company name or subject with one or more
pages.
• When typing a domain name which is easy to remember into a browser it converts it back into the
IP Address behind the scenes and lets you view the page.
IP Address = Domain Name
(3) Image source)
5. Data Packets and Packet Switching
• Data Packets: A data packet is what the data file is broken down
into so that it can be transferred to someone else over a network.
By taking a large file and breaking it into smaller data packets, this
allows it to transfer it between the networks quicker. In the example
on the teach-ict.com website it explains that a 2MB file would be
broken into chunks of 512 bytes in size. I have shown this in the
table below that 4096 packets would be sent.
• Packet Switching: It is a way of breaking down files into smaller
packets to be able to send them across a network e.g. 4096 packets
have been sent and each one is given a reference number so the
data is then reassembled once it has been received.
Calculator
from source 6
‘How are you?’ is
broken into 3
packets and given
a reference
number 1, 2, 3.
Image
source 6
6. Function of Routers
• Routers are used to transfer
data between devices.
• The data packets are
transferred from one router to
another through the networks.
• The router makes sure the
information goes where it is
supposed to and doesn’t let it
go somewhere it isn’t supposed
to.
• It makes sure the information
gets to the target.
(5)sources)images 4+5)
7. Sources for Points of Reference
1. http://www.oxforddictionaries.com/definition/english/Internet
2. http://www.teach-ict.com/gcse_computing/ocr/215_communications_networking/IP_and_DNS/miniweb/3. http://www.oxforddictionaries.com/definition/english/domain-name
4. http://www.oxforddictionaries.com/definition/english/IP-address?q=IP+address
5. http://computer.howstuffworks.com/internet/basics/internet-infrastructure3.htm
6. http://www.matisse.net/bitcalc/?input_amount=1&input_units=megabytes¬ation=legacy
8. Image Sources
1. Front page - http://dheoalfarisi87.blogspot.co.uk/2013/09/definition-internet-and-intranet.html
2. Front page - http://www.yourdictionary.com/images/articles/lg/234.Internet.jpg
3. Domain Names and IP Addresses: The link - http://www.bbc.co.uk/
4. Router: http://www.homeserverland.com/2009/05/securing-your-whs-and-network-part-8/
5. Router: http://www.techiwarehouse.com/engine/a27dabad/Home-Network-Router-Settings
6. Data packets: http://www.c-jump.
com/CIS24/Slides/Networking/N01_0270_ip_data_packets.htm
