the today's topic as I mentioned which is Citrix netscare which is also called as Citrix ADC which is application delivery controller so let's see what is Citrix net scalar so as per the statement over here Citrix netscaler is an application delivery controller created to optimize manage and secure network traffic it analyzes application specific traffic to distribute optimize and protect layer 4 to layer 7 Network traffic so the meaning of Citrix netscaler it is basically used to optimize manage and secure your network traffic so if you are if you are from Citrix virtual apps and desktop
background most of the guys you are aware of what is statistics killer and very important you might have work only with Citrix netscaler Gateway there are a number of other features which is also available in Citrix apart from Gateway so that we are going to discuss today basically so let's jump into our whiteboard where we are discussing what is the use case for Citrix netscaler and why we need it so basically let's imagine a company for example some e-commerce company maybe Amazon or Flipkart Etc Okay so they may have a web server this web server
basically it will responsible it is responsible for the portal so where you can go and you know buy the things so consider they have a one web server so maybe the load is more so they may scale up the web server because if only one web server is there then then if there is a number of traffic is hitting this web server and eventually this may choke to to avoid this company normally deploy multiple servers so I'm considering a web server here so backend they may have some DB Etc so let's not go into the
details about the backend the front end is web server so they they may add multiple episodes over here to you know accommodate user loads however without however by default there is no mechanism they can distribute the loads across these web servers for example some 100 connection is coming so our Android users are trying to access your website which is either Flipkart or Amazon or whatever so without uh our net scalar or without ADC concept so there is no method to distribute the traffic so 100 out of 180 or 90 make it here and only 10
only 20 will go here and this won't receive anything so otherwise all the 100 connection will go here and this may be sometimes idle so etcetera etcetera there is no proper method to distribute the load so in order to avoid this scenario there comes nuts killer so you will deploy in that scalar front and that by this web servers so now what will happen these 100 connections will land in that scalar so in the net scalar it is connected to the back end web server so now netscaler will distribute this hundred connection with the backend
for example in the first server it may send 30 connection and then 30 and then 40. so it will equally divide the load with the backend servers so this is the beauty of netscaler for this reason customers they will go with the net scaler and they will do the load balancing in the market not only net scalar there are n number of other vendors also available one of the famous vendors is netskiller and then we have F5 and then there are a number of other vendors as well so this is how you distribute the load
between the backend servers and one more important this is not only distribute the loads it will also check the health of the backend server for example if this server is having some issues and it is not performing well then netscaler won't send traffic to this particular web server so I other instead of that it will send to the remaining servers for example 50 connection to here and 50 connection to your unless and until this is healthy so this is also very good use case for the net scaler where it will monitor the back end before
it passes the traffic so this is the beauty of net scalar and this is only used for like in this use case I just took an example of load balancing so however ADC or Citrix net scalar not only used for load balancer there are a number of other features so that we are going to discuss in detail hope the concept is clear why we need net scale
