You are working as a senior network technician at Certkiller .com. You are learning a trainee about
different kinds of broadband. When you come to broadband delivered over satellite you tell the
trainee about the delay that occurs when communicating over satellites. What is this delay called?
A.
impedance.
B.
attenuation.
C.
latency.
D.
echo.
Explanation:
Communications latency is the time taken for a packet of data to be sent from one application,
travel to, and be received by another application. This includes transit time over the network, and
processing time at the source and the destination computers. Specifically, this is the time for
encoding the packet for transmission and transmitting it, the time for that serial data to traverse the
network equipment between the nodes, and the time to get the data off the circuit. This is also
known as “one-way latency”. A minimum bound on latency is determined by the distance between
communicating devices and the speed at which the signal propagates in the circuits (typically 70-95% of the speed of light). Actual latency is much higher, due to packet processing in networking
equipment, and other traffic.