7.2.5 Bandwidth and latency, and their effect on the performance of networks and connected systems Flashcards
Define:
Bandwidth
Measurement of how much data can be transfered between one point to another on a network, over a set period of time
Define:
Speed of a network
Rate at which data can be sent over a network
Fill The Blank:
It is important that the ………………. of a network is able to handle the required …………….. of all devices connected to the network so that the overall ………… is acceptable for all users
Bandwidth, Bandwidth, Speed
Define:
Symmetrical bandwidth
Same amount of data can be transmitted in both directions
Define:
Asymmetrical bandwidth
The upload bandwidth is smaller than the download capacity
Fill The Blank:
When installing a network it is important to calculate the amount of ……………… required
Bandwidth
State:
2 steps into calculating the required bandwidth for a network
1) Find out how much network bandwidth is available
2) Find out average usage required by each application
(both expressed in bytes per second - Bps)
Define:
Latency
Measure of time taken to transmit data from one point to another over a network
State:
What unit latency is measure in
Milliseconds (ms)
Describe:
How distance impacts latency
The further away a user is from the destination of a packet, the longer it will take to be sent
Fill The Blank:
DSL, cable and fibre optic have a lower latency than …………. because this, although it travels at the speed of light has to travel further than the alternatives and is therefore slower
Satellite
Fill The Blank:
A ………. takes time to process data and therefore latency occurs
Router
Define:
Propogation delay
Length of time it takes the data packets to travel from the device to the server
Fill The Blank:
If a ………… location takes a long time to process data it can become a ………………. in a network
Storage, Bottleneck
Fill The Blank:
An efficient network will have high ……………. and low …………
Bandwidth, Latency
