Shared Flashcard Set

Details

Network and application performance
N/A
22
Computer Science
Undergraduate 4
05/06/2012

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Cards

Term
Application performance depends on what?
Definition
The application
Term
Networking is one of the major influencing factors for app performance, what are some others
Definition
Endpoint chacteristics
Application / software characteristics
Term
What two aspects are there to network delay?
Definition
Bandwidth delay
Queuing delay
Term
What are twothings to consider with processing delay
Definition
Hardware processing
Software processing
Term
One way delay is what?
Definition
The time between sending and receiving a packet
Term
What's round-trip delay
Definition
he time between sending a packet and receiving a corresponding reply
Term
What three things can you do to minimise delay?
Definition
Improve queuing
Improve processing
Increase bandwidth
Term
How to reduce loss?
Definition
Increase queues
Improve / slow down apps
Incrase bandwidth
Term
What's jitter?
Definition
Delay variation
Term
What's misoredering
Definition
duh
Term
What's route fluttering
Definition
Variations i nthe structure and loading of the path leading to jitter and misordering
Term
What can cause jitter and misordering?
Definition
Route fluttering
Term
What are the two alternatives to quality of service?
Definition
Integrated services
Differentiated services
Term
What is integrated services?
Definition
Reserve your circuit then use it
Term
Differntiated services
Definition
Prioritise your packets then send them
Term
What is bandwidth throttling?
Definition
Restrict the amount of data you can send per port / ip
Term
What is a traffic quota?
Definition
Count how much data you can send (per port / ip) and then block when someone reaches their qutoa
Term
Where is the internet congested?
Definition
More towards the edges and less at the core
Term
Where was congestion located in 00s?
Definition
Slow saccess speed
Term
In the mid 00s where was congestion located?
Definition
At the core
Term
Current issues with congestion?
Definition
Not as much at core, but p2p pushes on bandwidth
Term
What's a method of human-perceived performance?
Definition
Via mean opinion source
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