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Application Delivery Network appliance is known as load balancers & it was used to manage the applications or server farm which delivers services to end users or customer.
Server load balancing is the process of distributing service requests across a cluster of servers. There are many benefits to this process, these include:
Benefits of Application Delivery Network:
Ø Improves performance - The highest performance is achieved when the processing power of servers is used intelligently. Advanced server load balancing products can direct end-user service requests to the servers that are least busy and therefore capable of providing the fastest response times.
Ø Creates Resilience - high-availability pairs for load balancer resilience, and creates fault-tolerance for your back-end servers.
Ø Adds Intelligence - Content inspection rules allow you to send requests for certain web pages to specific groups of servers.
Ø Improves Reliability - By continually monitoring the health of your back-end servers, failed servers are automatically detected and removed from the cluster until they recover.
Ø Ease of Use - Easy to install and configure, and include a secure, web-based graphical user interface which provides you with visual alerting, health monitoring and cluster diagnostics.
Ø One-Click Session Persistence - If sticky sessions are required for your web application, just turn on session affinity with one click.
Ø Improved flexibility and scalability - Many content intensive applications have scaled beyond the point where a single server can provide adequate processing power. Both enterprises and service providers need the flexibility to deploy additional servers quickly and transparently to end-users.
Ø Enhanced availability - server load balancing is its ability to improve application availability. If an application or server fails, load balancing can automatically redistribute end-user service requests to other servers within a server farm or to servers in another location.
Ø Less disruption - Server load balancing also prevents planned outages for software or hardware maintenance from disrupting service to end users.
Distributed server load balancing products can also provide disaster recovery services by redirecting service requests to a backup location when a catastrophic failure disables the primary site which is known as GSLB (Global Server Load Balancing)