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LO2 - Coggle Diagram
LO2
2.4 operating systems
single user
An operating system that allows a single user to perform only one task at a time is called a Single-User Single-Tasking Operating System.
An example would be a traditional phone where a phone call and texting cannot happen simultaneously. single user single application, an example of single user multi tasking is when there is a single user but can multitask on the computer, listen to music and write documents.
single processor
A single processor system contains only one processor. So only one process can be executed at a time and then the process is selected from the ready queue. Most general purpose computers contain the single processor systems as they are commonly in use.
multi processor
A Multiprocessor is a computer system with two or more central processing units (CPUs) share full access to a common RAM. The main objective of using a multiprocessor is to boost the system's execution speed, with other objectives being fault tolerance and application matching.
Also known as parallel systems as they can run processes in parallel to each other efficiently
multi user
Multi-user software is software that allows access by multiple users of a computer. Time-sharing systems are multi-user systems. Most batch processing systems for mainframe computers may also be considered "multi-user", to avoid leaving the CPU idle while it waits for I/O operations to complete.
2.1 types of software
off the shelf
off the shelf software is where a licence can be purchased and used for a single computer. off the shelf software is helpful for small businesses and the average user however not for businesses
bespoke
bespoke software is custom tailored to the needs of the customer , this is more efficient as all specific tasks can be covered correctly. however bespoke software can take an extended amount of time to create and will also have a large cost to create
open source
open source is where source code is available and the software is free to use. this software can also be edited for personal use. one downside is that open source software will likely have bugs as its created by volunteers and do not have a dedicated team.
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2.9 protocols
TCP, IP, SMTP, FTP, HTTP, SNMP, ICMP, POP.
protocols are basically agreed rules on how to engage in data transfer over the internet.
TCP-It is an industry–standard model that can be effectively deployed in practical networking problems.
It is interoperable, i.e., it allows cross-platform communications
IP- gives data an address to be sent to
SMTP-SMTP provides the simplest form of communicating through email messages between various computers in a particular network.
FTP-c used for organising files on a web server and the transfer large files
HTTP-Communication between client computers and web servers is done by sending HTTP Requests and receiving HTTP Responses
POP-In computing, the Post Office Protocol is an application-layer Internet standard protocol used by e-mail clients to retrieve e-mail from a mail server. POP version 3 is the version in common use.
allows for starring and saving of emails
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2.8 troubleshooting
many different ways to trouble shoot a computing error
for example for a freeze the task manager could be opened by pressing ctrl alt delete or the computer could be powered off and restarted.
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