Information Technology Flashcards
Information technology
Processing and distribution of data using computer hardware and telecommunications and digital electronics.
Application of information
Education science, communication, business, government, media uses,
Secondary and primary memory
USB , ram ,rom
Primary
Rom : read only memory
Ram: read and write memory.
Types of ram
Dynamic ram: refreshed thousands of time.
Statics ram: does not required to refresh
Types of rom
Rom, prom, EPROM.
Surveillance
The act of carefully watching some one or something especially in order to prevent or detect crime, Merriam Webster
Types of surveillance
Internet monitoring, mobile phone monitoring, telephony monitoring
Optical fibre
It is the technology associated with data transmission using light pulses travelling with a long fiber made up of Glass or plastic.
Classification based on material
Made up of plastic
Made up of glass
Classification based on the mode
Single mode:used for Long distance transmission
Multimode : short distance
Advantage of optical fibre
Economical and cost effective
Thin and non flammable
Disadvantages
Difficult to install
Expensive to install.
Can’t be curved
