last min cram

Cards (12)

purpose of NIC? 
Allows a device to connect to a network that are built into motherboard
What do routers do?
Control the direction of packets
how do wireless devices transmit data?
Using radio waves
Why are ethernet cables twisted together?
Reduce interference
How does fibre optic work?
Light is transmitted as data
what does communication on the same network use?
mac address
Purpose of MAR? 
address of where is being fetched / where it will write to
What has to be shared across all devices transmitting?
Bandwidth
Why is lower bandwidth bad?
More collisions are likely
Purpose of TCP? 
splits data into packets and handles errors
What protocol is used to receive and what protocol is used to send emails?
SMTP- SEND
POP- RECEIVE
3 types of utility software? 
Encryption , data compression and defragmentation