What is a network protocol
It is an agreed way of how to communicate over a network
What is a protocol
it is an agreed set of rules of how to do something
What does TCP/IP stand for
Transmission Control Protocol / Internet Protocol
What is TCP/IP used for
This protocol prepares messages for transmission and reassembles any received messages
When sending data the TCP rules include…
- Dividing the message into packets
- Adding a sequence number to each packet so the message can be reassembled
- Adding extra error-correction information so errors can be spotted and fixed
When receiving data the TCP rules include
- Examining each packet for errors by using the extra information that was added to it
- Fixing any errors or requesting that the packet can be re-sent
- If all packets are present, using the sequence number of each packet to reassemble the message
When sending data the IP rules include…
- Add the destination address to each data packet
- Add it own address to indicate where it came from
When receiving data the IP rules include
- Accept data packets that its own address attached
- Ignore all data packets that do not contain its own address
What does HTTP and HTTPS stand for
HyperText Transfer Protocol and HyperText Transfer Protocol Secure
What is HTTP used for
This protocol allows a browser to request these individual files from a web server in a orderly way
What is HTTPS used for
This protocol works like HTTP but also encrypts web page data before it is sent out of the browser or server
What does FTP stand for
File Transfer Protocol
What is FTP used for
It is used to transfer files between a client and server on a computer network
What does POP stand for
Post Office Protocol
What is POP used for
Allows emails to be downloaded and/or deleted from a mail server and viewed offline by an email client
What are the disadvantages of POP
- It can only handle one mailbox
- Messages, once downloaded are removed from the server and cannot later be viewed by other devices
- It does not support complex searches of emails on the server
What does IMAP stand for
Internet Message Access Protocol
What is IMAP used for
It is similar to POP but it also offers more complex commands to manage emails on the server itself
IMAP allows you to…
- Set flags on emails showing where they have been viewed replied to etc.
- Access emails on multiple devices i.e PC, phone, tablet etc.
- It can handle more than one mail box
- You can choose where to download just the headers, full body or not to download attachments
What does SMTP stand for
Simple Mail Transfer Protocol
What is SMTP used for
It is used by the mail server itself to send and receive emails from all other mail servers across the internet
How does Ethernet work
It is a family of protocols responsible for sending and receiving data along a network cable
The Ethernet protocol is in several parts such as…
Hardware - Specifies the performance expected of network cables, plugs and sockets
Data format - Describes the format of the data packets sent or received over the network
-How to deal with data collisions
How does Bluetooth work
It is a wireless protocol that was developed to allow devices that are very close to exchange data
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Computer Systems and CPU17
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Von Neumann Architecture8
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The Fetch-Decode-Execute Cycle5
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Memory19
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Storage11
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Types of Networks9
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Network Performance10
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Client-Server and Peer-to-Peer7
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Network Hardware27
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DNS, IP Addresses, Web hosting and The Cloud22
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Virtual Networks3
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Network Topologies10
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Protocols26
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Packet Switching11
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Network Security3
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Network Threats10
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Malware10
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Network Security Methods15
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Logic And Truth Tables10
