Ict chapter 3 (3.8 - 3.10) Flashcards
What is virtual memory?
a type of memory that can be used as a extension to the RAM
When does virtual memory come into use?
When a computer only has a set amount of RAM , when that RAM becomes full it needs extra help so virtual memory comes in
How is virtual memory created?
It is created in a computer in a computer system with a hard drive component. a section of that hard drive is partitioned off and is effectively an extra bit of RAM instead.
How does the computer decide what data to temporarily transfer to the virtual memory?
it will choose to send that that isn’t as immediately required as other data
What the the name of the location of which the data is collected at?
a page
What is a page?
a unit of data
When are the pages of data sent back?
they are sent back to the RAM when they are required again
Why would a computer crash?
if the RAM became full and the computer did not have the ability to transfer pages data to virtual memory
What is cloud storage?
data storage that is owned by a third party storage and accessed by the user, using the internet
What is a server?
a component that acts as a central resource for the storage of data and application or for providing a service
What are the 4 differences between cloud storage and hardware storage?
- For cloud storage you don’t need to pay for the hardware store the data while hardware storage needs to be purchased in order to store the data
2.For cloud storage you do not have the responsibility for the security of the hardware that stores the data but with local storage you need to maintain the hardware and check up on it regularly
3.With cloud storage you can increase or deacrease the amount of storage space you need very easily but with local storage you can only chnage the amount of storage space by going to shops and buying expensive hardware
4.With cloud storage you can access it anywhere as long as you have a internet connection whilest local storage can be accessed as long as
What is a Network?
Computers and devices that are joined together using cables or wireless technology
What are the basic hardware which are required to create a network?
Network interface card , a router and you may need some transmission media.
What is the component which is used to connect a computer to a network?
Network interface card (NIC)
What is the router?
a router is a hardware device that reads each data packet to obtain its destination address and then forwards the packet to this address
What is transmission media?
The cables that are used to transfer data in a network
Most NICs are wireless. T / F
True
What does the MAC address stand for?
Media access control
What is the MAC address?
the unique address given by the manufacturer to the NIC
How is the MAC address represented?
it is represented as hexadecimal and normally has six pairs of numbers separated with either dash or a colon
How does a computer which receives data know from which computer it was transmitted from?
when a device with a network interface card transmits data across a network, it will send the MAC address of that device with the data
What is the unit of data that is used to transmit data across a network?
data packets
Why is the IP address different than the MAC address?
the IP address is assigned by the network while the MAC address is assigned by the manufacturers
When is a device given a IP address?
When it first connects to the router
A IP address can either be ——– or ———.
Static or dynamic
