Exchanging Information Flashcards
What is instant messaging? What are their features?
a typed conversation with other users who are logged in to a chat room
types message, symbols (smilieys), video is possible
What are text messages? What are their features?
typed messages that have a limit on the number of characters - using mobile phone
same as instant messaging, including pictures
What is email? What are their features?
types message that is sent to other people via a server - using computer (or phone)
attach files, high/low importance, address book
what is facsimile? What are their features?
a fax machine that sends copies of a document to others using telephone lines
image of document
What is video conferencing?
uses networks or the internet to hold meetings with people in different places
uses cameras, microphone, speakers
what are blogs?
(web-log) messages sent to a website to update information about a person’s activities
same as texts
What are advantages of email?
no need for recipient to be on at the same time
messages could be stores, drafted, or forwarded
message can be filtered to different folders
What are disadvantages of email?
cannot send large attachments
address has to be accurate
must have access to computer/phone
What are advantages of fax?
cheaper to send than ordinary post
arrives quicker than post
used for legal documents
What are disadvantages of fax?
no color
no attachments
only secure is taken care of
What are advantages of video conference?
cost of travel is avoided
calls can be made short notice
easy contact with people who work from home
What are disadvantages of video conference?
must have reliable connection
lack of personal contact
difficulty when handing out documents
who uses a star topology?
schools and homes
how are networks arranged?
in topologies
How do networks work?
- has a node (pc, laptops, printer ect..)
- network interface card needed to connect to a network
- network hub connects nodes together and sends data to the network
- a switch sends data where it is needed
- routers connects networks together, so WiFi can connect devices and WAPs allow them to access internet
What is the WWW (world wide web)
a large collection of web pages containing information
pages are written in HTML (hypertext markup language)
What are navigational aids?
buttons for moving back, forward, or home menus to go to other pages or places on the web
What are hyperlinks?
used to go to other pages or websites, files and documents through URLs
What are some specialised shopping websites?
text boxes for entering details of contacts, payments and validation checks for the details
what are the advantages of using the internet to look up information
vast amount of information
info can be found quickly compared to looking it up in a book
information on almost any topic
what are the disadvantages of using the internet to look up information
there could be too much information
search results may not be useful
copyright restrictions may apply
How can files be shared?
placed on web page or stored on a server for downloading
File transfer protocol
attachments by email
