transfer information:
postal service is an example of a network system. internet is the postal service on steriods
definitions:
- NIC- network interface card
- UTP cable- unshielded twisted pair
- router- hook switches together. bridging device. directs traffic to the right switches.
- dial-up internet sends the signal over phone lines. its slower because you have to convert the signal from your computer to a series of sounds.
- fiber optical cable: sends information-signals over flashes of light. light travels faster than electricity and is able to send more volts. data speeds are much much greater
world is connected through the internet by under sea fiber optic cable. most internet traffic goes through cables. can go wireless through a satellite, but it is much more expensive.
inter-planet: communicate with devices out in space through an internet like connection.
know *local and wide area networks and how messages move across them.
Advertisement
