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Network revision (Network security (What is physical security (Why is it…

- - - - The spoofed keyboard could then be used to emulate key presses and send commands to download and execute a malware program.
  - - - If you touch a device, you can gain access.
        
        Prevents physical attacks on things.
      - How can access to servers and network hardware be controller?
        
        examples
        
        Door locks
        
        Security guard
        
        CCTV
        
        How could you record details of who access hardware on certain times/dates.
        
        examples
        
        Sign in sheets
        
        Bio metric scans
        
        CCTV
- - - - Advantages
        
        Requires less cable length than a star topology resulting in lower costs
        
        It works well for small networks
        
        If one node fails, it will not affect the whole network
        
        Disadvantages
        
        Slow with many nodes in the network
        
        It is difficult to isolate any faults on the Network
  - - - Advantages
        
        If one node or its connection breaks, it doesn’t affect the other computers nor their connections[3]
        
        Devices can be added or removed without disturbing the network
        
        They work well under heavy loading
- - - - 1Kb = 1024 bytes
        
        1Gb = 1024Mb
        
        1Mb = 1024Kb
- - - - Addressing system
        
        Routing information
        
        Acknowledgement
        
        Will each part of a messaged be acknowledged
        
        Speed
        
        What speed will the data be sent at?
        
        How will data get to its designation on the network
        
        How each computer will be identified on the network
      - Each protocol could use a different type of error checking. Error checking allows errors to be detected so that the corrupted data is rejected.
  - - - HTTP - Hypertext Transfer Protocol
        Transfers web pages from web servers to the client.
        
        HTTPS - Hypertext Transfer Protocol Secure
        An HTTPS address is a secure web address which has been encrypted.
        
        POP3 - Post Office Protocol
        Is used to receive email.
        
        TCP - Transmission Control Protocol
        One of the main protocols in the set of protocols used on the internet. TCP allows two computers to establish a connection.
      - FTP - File Transfer Protocol
        It is used to transfer large files. It is often used for organising files on a web server for a website.
        
        SMTP - Simple Mail Transfer Protocol
        Is used to send emails.
        
        IP - Internet Protocol
        A set of rules for communicating over the internet.