What are the four quality of service (QoS) requirements for continuous data streams?

The four quality of service (QoS) requirements for continuous data streams:

1. Throughput (bits/s) - Which minimum/maximum/average data rate is necessary?
2. Transmission delay (ms) - Which maximum delay is tolerable?
3. Jitter (ms) - Which fluctuations in the transmission delay are tolerable
4. Availability (%) -With which probability the communication service is available?

Note: Different application have different requirements to those parameters.

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What is QOS in networking?

QoS(Quality Of service) in Networking:

In simple words, QoS is the ability of the network to provide better or special service to a set of users and application to the the detriment of others.

• “ability of the network”-it means that this will be done by network infrastructure i.e., switches and routers. There will be no traffic shaping server, the network infrastructure has to do this job.
• “to provide better or ‘special’ service”,- it means some traffic flow will be given preferential treatment and others will be given what is left over.
• “To a set of users and applications”, -it means which flow should get preference and which will get detriment treatment or less BW
• “To the detriment of others”-it means that since there will be a finite amount of bandwidth, if some flow is given more bandwidth there will be less available for the remaining traffic.
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What is the difference between a recurrent state and a transient state in a Markov Chain?

Difference between Recurrent state and Transient state in Markov Chain

i) A state ‘i’ is called Recurrent, if we go from that state to any other state ‘j’, then there is at least one path to return back to ‘i’.

On the other hand, there will be at least one state ‘j’, to which we can go from state ‘i’, but can not return to ‘i’. then state ‘i’ in this case Transient.

 

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