Computers - June Exam Flashcards
What is a network?
A collection of two or more computers or computing devices that are connected and can communicate
What are examples of networks?
Cell phone networks, banking networks, Telecom network, business networks, I’ll school network, the Internet.
PAN
Personal area network – around your desk
LAN
Local area network – one or two buildings
WAN
Why did area network – links stores in various areas
GAN
Global area network – spans many countries
What are two main advantages of networks?
Easy, fast communication and sharing of resources
What are disadvantages of networks?
Network administrator with network enterprise is needed, network is down or server crashes no one can work and security
What is peer to peer networking?
Consists of less than 10 computers connected together using a hub
What is a client-server network?
Has a main computer. One computer is more important than the other
What is a server?
A centralised computer, that stores all files that the teacher wants to share. It has more RAM, CPU and a bigger HDD. It needs a special network operating software
What is a switch?
Connects all computers so that communication between them is strong
What is a ADSL modem?
It connects local network to Internet
What is NIC
It is a network interface card/controller. It allows computers to communicate
What is a network operating system?
It allows an network connection.
How are all devices connected?
The communication media – I can be wired or wireless
What is wired
It uses cables. It runs so ceilings and downloads in white trunking.
What are two types of wired cables?
Copper cabling called UTP (unshielded twisted pair)
Fibre optic cables use light (optical) transmission
What are wireless cables?
All devices on a wireless network need to be Wi-Fi in a world and able to communicate with a Router
What is cellular connection?
Using a cell phone network such as MTN, Vodacom, cell C ect
What are the differences between Wi-Fi and cellular?
Wifi - A wireless card is needed, software. No I SP needed. It is fast if closed near the Rueter. It is three in public areas and there is A limit on data. Public is usually not safe
Data - must be on a smart phone, needs to be a client of a network company. Depends on the area for speed. It is expensive. It is more secure than Wi-Fi.
What are communication protocols?
These are the rules of communication different countries have different protocols. Some of which are considered to be good etiquette. General protocol for use of the Internet is TCP/IP
What does FTP stand for?
It is used for transferring files. File transfer protocol
What does SMTP mean?
Used for emails. It is simple mail transfer protocol
What does VoIP stand for?
It is use for talking across Internet. Voice over Internet protocol
What does GSM stand for?
Global system for mobile communications. It is 2G tech
What does Edge stand for?
This is to do you take, it is slightly faster then GSM
What is 3G?
3G has made video calling a reality.
What does HSDPA stand for?
High-speed down-link packet access, it is based on 3G but with more speed.
What does HSPA+ stand for?
Evolved high-speed packet access. It is 4G tech.
What is LTE?
Long term ever louche and. It is 40 standard and support HD video streaming.
What does WWW stand for?
World Wide Web. It is billions of documents written in HTML code. No one owns the Internet.
What does every computer have to in order to send or receive information?
A host name and IP address. An IP address is a four decimal number separated by dots example 179.60.192.3
What is Protocol?
It indicates The way information is saved
What is the host name?
Indicates server where the webpages is stored.
What are the documents?
Indicate path of folders to get to file/page
What are search engines?
Websites That contain complicated processes to list a website on specific topic
What is an inbox?
It’s where emails that you have received I kept
What is an outbox?
Where emails that you have sent are placed
What is sent ?
Where emails you have sent are placed
What are drafts?
Emails you are busy writing.
What I deleted items?
Items you have place in your trashcan or that have been deleted
What is junk mail?
Mail that you do not want or it is spam
What are Contacts?
People you sent emails to.
How do you fix problems on your computer?
- identify exact issue
- Verbalise problem based on symptoms
- Localise cause
- Formulate plan
- Implement plan
- Test to verify it is correct
- Document problem and solution
- Provide feedback to user
What is a webpage?
A document written in text and formatted using HTML, XML, CSS or JavaScript.
What is a website?
A set of related webpages of a company, organisation or individual.
What is HTML?
Hypertext markup language. It is basically programming language used to develop webpages.
What is a web browser?
A program used to view webpages.
