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types of computer system- Unit 1 LO1 :face_with_cowboy_hat: - Coggle…
types of computer system- Unit 1 LO1
:face_with_cowboy_hat:
mainframe
what are mainframe computers
A mainframe is a kind of computer system which is known for:
having a huge amount of storage space
able to handle a lot of data traffic
extremely reliable - with multiple spare components - able to run continually for very extended periods
able to "hot swap" components without disrupting the services the mainframe carries out... this includes being able to remove and add in components without having to power down the machine.
running "critical" jobs for the organisation.
able to run hypervisors - virtual systems.
desktop/server
cheaper and more powerful
servers
Servers are often managed by highly trained staff. A server provides a service to computer systems which connect to it. For example, servers may provide any of the following services:
Email access (mail server)
Internet filtering (filtering server)
Shared areas & private files (file server)
Access to a website - which is stored on the server (web server)
Running a virtual machine* - hypervisor server
a desktop computer is very recognisable and are the most common computer system
virtual machines
all processing is done on the server
can also be known as virtual clients
servers
: As already stated, servers provide services to network users. Sometimes, a single server may provide multiple services. In this case, there are extra considerations:
If the server is overloaded providing one service, then the additional one may be negatively impacted.
If the server stops working for any reason, then both services will be unavailable.
If there is a network connection issue from that server to the rest of the network, then both services will be unavailable.
If combing multiple services into one server, thought should also be given to the data that is stored there. For example, a file server (by itself) does not need access to the Internet... but if you combine a file server with a web server, then suddenly that device, which holds all the files has Internet access.. there may be more risk to the personal files held in this way.
servers which provide file servers allow users to move between connected devices
this is to create freedom for the users and allow them to work on multiple devices at once in order to be as efficient as possible
this allows students/staff to continue working even if a workstation stops working
tablet/hybrid
a tablet is usually small enough to be a handheld device
These devices usually have on-screen keyboards which operate via touch screens. Applications may be installed on these devices, but there is usually a smaller selection of software available than for a Desktop.
A hybrid device has a form factor which is a mixture of tablet computer and laptop. These are generally sold as an "all in one" laptop, which can then operate as a tablet by removing the screen and responding to touch and gesture controls.
Sometimes these devices come with an additional input device such as a pen, which is also referred to as a "stylus".
a hybrid may be able to run all the apps that a laptop can run but may need to change user interface to cope with the different devices used
have not found major mainstream success yet
smart phone
Smartphones run a range of Operating Systems including Andriod and iOS.
apps can typically be bought in the app store which is built into the operating system
These stores contain Apps which are only designed to run within that environment and are (to varying extents) vetted and checked
these apps can either be free or you have to pay for them
Smartphones generally contain CPU's which are as powerful as lower end desktop computers and run off battery.
cpu
central processing unit
Battery technology is continually improving - to the extent that phones are now capable of charging in much less time. Some smartphones even boast wireless charging through charging mats.
smart phones allow for internet access such as WiFi and 4G/5G
smart phones all have touch screen, some have face recognition and all having very powerful speakers
quantum
quantum computers are a very different type of technology
quantum computers store data in a quantum state
at any point it contains a 1 or 0
traditional computers tend to use binary in order to store data
huge organisations have been tyrying to make quantum computers
organisations such as:
google
IBM
national governments
can perform tasks that normal desktop computers cant perform
internet of things
also known as the IoT, this is a technology which aims to embed network & Internet connectivity into a wide range of devices that have not traditionally had it.
this is a very fast growing market which is only becoming more and more popular
technology used in IoT
This technology is now being used in mundane items such as:
doorbells (which are improved to include WiFi access video feed and smartphone alerts)
locks (to respond to smartphone access)
mirrors (to project calendar reminders & weather reports)
speakers (to include microphones & internet access and voice recognition technology)
refrigerators (to include cameras for monitoring their contents and internet access to reordering goods)
risks to the IoT
lack of security
easily hackable
could leave private information to be leaked and stolen from hackers