media converter
Switches
The Internet has changed communications by allowing computer networks to interconnect.
NASDAQ is an exchange. An exchange is a place where transactions takes place (Buy/Sell). ECN is an electronics communication networks and is completely different to an exchange.
No. A hub is hardware that connects different devices within a single network. You probably are thinking of a switch or router.
MX :)
I am not sure what you mean by incompatible... But routers serve as connection points between different networks. Also if you meant fiber optic to twisted pair to coax then there are special converters that allow to do that.
An Internet Exchange Point (IXP) is a physical infrastructure that enables different Internet Service Providers (ISPs) and networks to connect and exchange Internet traffic with one another.
Wireless networks are not laid out using the same topologies as wired networks. They have their own, different layouts. Smaller wireless networks, in which a small number of nodes closely positioned need to exchange data, can be arranged in an ad hoc fashion.
Optical fiber
mail exchanger (MX) resource record
it didnt.
Communication systems are a collection of networks, relay stations and systems, they are used so these types networks can interconnect. For example you have multiple TV channels which pass through the communication system and come out the other end through a receiver on your TV.