the internet (intro) Flashcards
what are the 3 main components of the internet
hosts
communication links
packet switches
hosts
end systems that runs one or more distributed network applications
communication links
wired or wireless links that help devices communicate
wired links
fibre or copper
wireless links
radio or satellite
what is the advantage of wireless links
they are faster; wireless is about the speed of light whilst wired is about 2/3 the speed of light
packet switches
devices with 2 or more links that can send and receive information in packets
what are two examples of packet switches
routers
link layer switches
global/tier 1 isp
global internet service provider; connects multiple countries and regions
regional isp (4)
per country/ smaller geographical location
connects to the global isp
usually delivers and fetches content
they only have a small amount of users so they have to pay the global isp
what is a protocol
rules for what each system needs to do when it gets a particular message
communication protocols
internet standards that must be public
how are communication protocols made public
request for comment protocol; spec and organisational notes about the internet
which governing body standardises protocols
the IETF; internet engineering task force
