2022 Paper 1
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2000 terabytes equals?
2 petabytes
Control unit?
Runs f e cycles
Explain why the number of devices using the network at the same time can affect the performance of the network
Bandwidth will be split Less bandwidth for each device Loss of more packets more data has to be retransmitted
An ipv4 is made of 4 groups of digits each group can be between the debars values?
0 and 255 seperated by full stop
Explain why Ethernet is a standard
High bandwidth Inbuilt security
3 tasks carried out by a router
Receive packets Transmitting packets Assign ip addresses to devices
Why library should use encryption
Data can not be understood if intercepted To follow legislation
2 software based security methods from malware
Firewall Scans incoming outgoing traffic and blocks traffic that is unauthorised Anti malware Scans for malware Compares data to a known database Stops the download of malware
Describe how an analogue sound wave is converted into digital form
Sound wave sampled at regular intervals Sample stored as binary number Binary number for each sample is stored sequentially
3 pieces of metadata of an image
Height width file size
2 benefits of compression
Faster to upload Reduces file size
Difference between ram and rom
Rom is non volatile
2 data that the smart to could store in ram
Current volume Source being watched
Why a smart to needs secondary storage
To store data such as the OS once the computer is turned off
One appropriate type of secondary storage
Magnetic Large storage capacity for storing software Cost to purchase is low so the tv wil be cheaper to manufacture Reliable