Traditionally network administrators have learnt to use packet analysis for troubleshooting complex problems. Some invested in expensive traffic capture appliance to capture and retain the traffic for later analysis; in case they get reports for a performance degradation, they can extract trace files and load them into a network analyzer (Wireshark or commercial) and look at packets.
Diagnosing network performance issues is part of your daily work. Whatever the network diagnostic tools you use, it is important to understand what are the symptoms of network performance degradations and what are the most likely root causes for them.
Accelerating troubleshooting operations is key to maintain the business productivity through excellent end-to-end user performance rates.
Understanding network latency is key to:
- Managing properly the delivery of applications through the network
- Understanding how network performance can be improved
Read more to understand the basics of network performance.
Here is a typical context: many sites are spread around the world for manufacturing and two central datacenters host all the internal applications. The internet gateway is provided by the service provider. The traffic from the remote sites can either go to the internet gateway, to another remote site or to the datacenters.