What is Round Trip TimeRound-trip time (RTT) is the duration, measured in milliseconds, from when a browser sends a request to when it receives a response from a server. It’s a key performance metric for web applications and one of the main factors, along with Time to First Byte (TTFB), when measuring page load time and network latency. Show
Using a Ping to Measure Round Trip TimeRTT is typically measured using a ping — a command-line tool that bounces a request off a server and calculates the time taken to reach a user device. Actual RTT may be higher than that measured by the ping due to server throttling and network congestion. Example of a ping to google.com Factors Influencing RTTActual round trip time can be influenced by:
Reducing RTT Using a CDNA CDN is a network of strategically placed servers, each holding a copy of a website’s content. It’s able to address the factors influencing RTT in the following ways:
One of the original issues CDNs were designed to solve was how to reduce round trip time. By addressing the points outlined above, they have been largely successful, and it’s now reasonable to expect a decrease in your RTT of 50% or more after onboarding a CDN service. Is the amount of time it takes for a signal to travel from one location to another on a network?Propagation delay is present in data networks as well, as it takes time for the signals to travel from the point of transmission to the receiver. This can also be called the transmission delay, flight time or time of flight for the signal.
Which of the following terms is the time it takes a signal to travel?Latency is a synonym for delay. In telecommunications, low latency is associated with a positive user experience (UX) while high latency is associated with poor UX. In computer networking, latency is an expression of how much time it takes for a data packet to travel from one designated point to another.
Which of the following are radio waves that provide a high speed signal transmission?Microwaves are radio waves that provide a high-speed signal transmission.
Which of the following kinds of cable consists of one or more twisted pair wires bundled together?Twisted-pair cable consists of one or more twisted-pair wires bundled together (Figure 8-24). Each twisted-pair wire consists of two separate insulated copper wires that are twisted together. The wires are twisted together to reduce noise. Noise is an electri- cal disturbance that can degrade communications.
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