Your Domain Name is your digital identity, the first interaction your customers will have with your online brand. In this article we will cover DNS Poisoning and why you need to proactively monitor and catch it before it affects your business; but before we get to testing and detecting a…
Today we venture forth looking at a couple of additional flags found in the TCP header: CWR and ECE. These TCP flags are used together with two flags in the IP header (ECT and CE) to warn senders of congestion in the network thereby avoiding packet drops and retransmissions. Background…
The following article by Ritesh Maheshwari details how LinkedIn, a Catchpoint customer, switched their DNS solution from Unicast to Anycast, and was originally posted on LinkedIn’s Engineering blog. LinkedIn is committed to improving the performance and speed of our products for our members. One of the major ways we are doing…
Partly cloudy with scattered showers. Apdex is like a basic weather report; it provides a general overview of current conditions, but it doesn’t tell you how many people are standing out in the rain. Typically, Apdex is used as an index to represent response time performance against user expectations. For…
Media sites and the teams that are tasked with developing and maintaining them face a unique set of challenges. Much like all IT Ops and Development teams, they need to be concerned with consistent internal and external monitoring to insure that the site is available and that it is performing…
Why the 200ms delay? Over the course of our work, we have the fortune of diving into numerous network issues. One particularly interesting one involves a curious ~200ms delay in the acknowledgement of the response packet for small HTTP responses. This doesn’t sound all that terrible unless you have a…
In our previous articles on DNS we gave an overview of the recursion process, but before we can go further on how DNS impacts performance, we need to understand how it the DNS protocol works. In the TCP/IP Protocol suite, DNS is an application layer protocol. DNS protocol relies on…
At Catchpoint, we believe that fast DNS (Domain Name System) is just as important as fast content. DNS is what translates your familiar domain name (www.google.com) into an IP address your browser can use (173.194.33.174). This system is fundamental to the performance of your webpage, yet most people don’t fully…
Learn more about Smoothed Round Trip Time (SRTT) in this blog.
When performing statistical analysis on aggregations, it is very important to understand its subsets. This is especially true when interpreting RUM data aggregated across multiple regions, since an end user’s distance from the datacenter hosting the website impacts the performance of the page on end user’s browser. To illustrate this…
