Product - f5 network
F5 Global Traffic Manager (GTM)
FAST, SECURE DNS AND OPTIMIZED APPS AROUND THE WORLD

FAST, SECURE DNS AND OPTIMIZED APPS AROUND THE WORLD
LTM virtualizes the services of physical servers and using the health monitors to continue monitoring the services. In case of any of the service down, it will not send the user request to that service.
When the user accesses the server, it hit the virtual server (1), which created inside LTM and not the physical server. LTM forward that request to the physical server (2) and then get the result back (3) and send that to the user (4). So, in case of failure to any of the physical servers, LTM will send the user request to working server.
Any enterprise organization running mission-critical application requires high availability, limiting access to the physical servers, secure access to their application and improve the performance of their application must have this solution in place to make sure of their business continuity.
BIG-IP GTM intelligently routes traffic to keep pace with changing network and user volumes that can overwhelm a data center during peak traffic times.
BIG-IP GTM manages requests with DNS Express, effectively handling spikes in DNS query volumes whether due to legitimate requests or DDoS attacks.
BIG-IP GTM DNSSEC signing protects LDNS servers from cache poisoning and man-in-the-middle attacks, and provides superior DNS performance, while DNSSEC validation offloads CPU-intensive verification for faster response.
With BIG-IP GTM, you can perform comprehensive site availability checks and performance monitoring while closely controlling and defining conditions for managing traffic.
Using DNS caching reduces the number of DNS queries and latency. BIG-IP GTM responds immediately to subsequent client requests for the same site and provides its own DNS resolving, without requiring the use of an upstream DNS resolver.
BIG-IP GTM provides intelligent “health” checks that are superior to single health checks and essential to determining availability for today’s applications.