Muhammad Muzammil

computer science communication computer network first year computer physical channel physical media media and types types of media types of wireless media types of guided media network media cellular system mobile syste satellite system coaxial cable information network fiber optics wireless media guided media network medium networking data communication session layer presentation layer application layer layers of osi model open system interconnection osi model difference of laser and line working non impact printer working of impact printer speed of printers dot matrix printer line printer impact and non impact printer daisy wheel printer ink jet printer laser printer printers and types