6.2 Network Services Abstraction Layer | (MCN) | MU | MSc IT  | Semester 2 | unit 2 lecture 14
Channel: BANSODE TECH SOLUTION
Date: 2021-07-03

6.2 Network Services Abstraction Layer | (MCN) | MU | MSc IT  | Semester 2 | unit 2 lecture 14
https://youtu.be/qGhPp9icWp0
#NETWORK #SERVICES #ABSTRACTION #LAYER IN #MODERN #COMPUTER #NETWORK
#MSCIT #BSCIT #MUMBAIUNIVERSITY #MCN #TUTORIAL #LECTURE #sem #2

Abstraction refers to the amount detail about lower #levels of the model that is visible to higher levels.
An abstraction layer is a mechanism that translates a #high-level request into the low-level commands #required to perform the #request . 
A #network abstraction #represents the #basic #properties or #characteristics of network #entities .

1. #ForwardingAbstraction 
The forwarding abstraction #allows a #control #program to #specify #data #plane #forwarding #behavior while #hiding details of the underlying switching hardware. 
This abstraction #supports the #dataplane forwarding #function. 
By abstracting away from the forwarding #hardware, it provides #flexibility and #vender #neutrality . 
The #OpenFlow #API is an example of a #forwarding #abstraction . 


2. #DistributionAbstraction 
This abstraction #arises in the context of #distributed #controllers. 
This abstraction #aims at #hiding #complex distributed #mechanisms (used today in many #networks ) and #separating #state #management from #protocol #design and #implementation . 

3. #SpecificationAbstraction 
The #specification #abstraction then provides an #abstract #view of the #global #network. 

The #presentation by #Shenker #summarizes these #abstractions as #follows : 
#Forwarding #interface : 
#Distribution #interface : 
#Specification #interface :


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