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Is Connection Latency Important to Your Business?
Author: John SheplerOne might be inclined to think that connection speed is the most important factor for private lines and Internet access. If web pages load slowly and file transfers take forever, your network is clearly low on bandwidth. Just order more Mbps or even Gbps and you'll be fine, right? Sometimes yes. Sometimes not. There is another networking consideration that can greatly affect your business. It is a delay.
What does delay mean?Latency is a delay. Nothing happens immediately, but if the delay is small enough, it will. Do you know the expression "blink"? It's low latency.
On computers, you lag because apps just can't keep up with what you're doing. If you press a key and it doesn't appear on the screen for a share, you have lag. If you type a command and nothing happens for a second, it's a timeout.
Latent may not be as noticeable when running on LANs and internal data centers. Programs respond. The video is nice and smooth. Files move quickly. If the system can keep up with you, lag is simply not a problem.
If the delay is noticeable
You often experience delays when first connecting to the Internet or the cloud. Suddenly, everything seems a little slow. It's frustrating when the system is so slow to respond that it interrupts your workflow. It almost feels like you've gone back to the days of batch processing when you submit a program and wait for the results to print.
At worst, delays occur in real-time processes. VoIP telephony gets a bad rap when latency exceeds a hundred milliseconds or two. During a telephone conversation, you expect a normal conversation. This includes both parties sometimes speaking at the same time. If you ask a question and don't get an answer right away, you can start over. At this point, you hear the other person react when you say something different. It quickly becomes unbearable. If you get stuck in a situation, you can work around it by consciously taking turns, for example using two-way radio communication.
Higher throughput, lower latency
Some of the reasons for the delay are traffic jams or network congestion. On a WAN of any size, expressed in bandwidth in Mbps or Gbps, you can only send a certain number of packets per second. If you try to send more, they accumulate in the transmit buffer or, worse, are discarded. The solution to this type of latency issue is simply to increase the capacity. If your T1 line is full, a 10 Mbps Ethernet line may be more than enough. Likewise, you may need 100 Mbps or a full gigabit/s for a seamless connection.
Another way to alleviate the madness caused by delays is to prioritize traffic. Real-time processes such as VoIP telephony and teleconferencing have the highest priority and can work well even over limited-bandwidth lines. As long as bandwidth remains, you should prioritize subsequent business applications in the cloud, as well as file transfers and backups. If you're running out of bandwidth and the lowest level processes never finish or take forever, you need to add more bandwidth, plain and simple.
More bandwidth, same latency
What happens if you increase throughput 10 times or 100 times and nothing improves? "Hello, is this line working?"
If the congestion has eased, then something else must be slowing things down. Remember that latency is simply the time between sending and receiving, and nothing happens instantly. Signals can travel at the speed of light, which even at 186,000 miles per second turns out to be 186 miles per millisecond. If the two ends of the link are 1860 miles apart, you have a built-in transfer time of 10ms each way, or 20ms total. If you need lower latency, just move closer.
Remember that light passing through fiber optic cable and transmission equipment can cause an additional delay reduction of about one-third of the ideal delay. However, this does not matter much, since delays on the order of tens of milliseconds are not a problem for almost all processes. But what if that link goes to a geostationary satellite? You can now talk with a round trip of 500 ms. It's definitely noticeable and probably replaces most phone calls and some cloud services. This is why new constellations of satellites in low Earth orbit are so eagerly awaited. At a distance of a few hundred kilometers instead of thousands, the delay can be traced back to the specifications of the fiber optic line.
Other lag issues can be related to faulty network equipment or the inherent nature of the good old internet. Remember that the Internet was designed by the Department of Defense to be unreliable and not particularly efficient. Packet routing can take long and complex paths and experience different levels of congestion on the Internet. If you use a shared bandwidth service such as cable, DSL, satellite, or mobile broadband, other users can block your connection and increase your latency. What's even crazier is that performance can vary from minute to minute, so you don't have any consistency. Dedicated direct connections to your cloud provider can greatly improve performance if you're concerned about that.
Are you having network performance issues, especially if you recently migrated from your own data center to the cloud? Your cloud service may be working just fine, even if it seems to be slowing down. You might be surprised when you test your line and find that it is the weak link in the system. Find out now what low-latency bandwidth options are available and how much it costs to improve and fix performance issues.
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