# Bandwidth and latency relationship

### What is Latency - How is Latency Different from Bandwidth

This relationship can be better illustrated with the following picture: Bandwidth/ Latency Relationship. To put it another way-. Imagine that you. Bandwidth refers to how wide the data pipe is, not how fast the data is transferred . Transfer rates are measured in latency (delay). Have you ever experienced a slow Internet connection when your kids are gaming or. A so-called low latency network connection is one that generally Cable Internet Connection (High Speed / Bandwidth, Low Latency).

One important thing to remember about latency is that it is a natural phenomenon postulated by Einstein in the theory of relativity.

### High Latency vs Low Bandwidth - Impact on Web Performance - GlobalDots Blog

In our universe, everything needs time to travel, even light. Imagine a highway with 4 lanes where the speed limit is 60 mph.

Throughput Vs. Latency

Now on the Internet, bandwidth is the highway, and latency is the 60 mph speed limit. No, by increasing bandwidth you increase capacity not speed.

Following the highway analogy, imagine that vehicles traveling through that highway were all trucks with house bricks for delivery. All trucks have to travel at 60 mph, but once they arrive at their destination instead of delivering 4 loads of bricks, 6 loads are delivered because 2 more lanes were added to the highway.

The same thing happens when you add bandwidth to an Internet connection, the capacity is increased but the latency speed stays the same. In this view bandwidth is seen as an intrinsic, fixed property of the transmitting medium itself, a number that's unaffected by the vagaries of the transmitters at either end of the medium. When people talk about bus bandwidth this way what they're really describing is only one type of bandwidth: The peak bandwidth of a bus is the most easily calculated, the largest read: In most product literature this theoretical number, which is rarely if ever approached in actual practice, will be cited whenever the literature wants to talk about how much bandwidth is available to the system.

Let's take a closer look at how this number is calculated and what it represents.

Figure 1 Take a moment to look over the simplified, conceptual diagram above. It shows main memory sending four, 8-byte blocks of data to the CPU, with each 8-byte block being sent on the falling edge or down beat of the memory clock. Each of these 8-byte blocks is called a word, so the system shown above is sending four words in succession from memory to the CPU.

Note that this example assumes a bit or 8-byte wide memory bus. If the memory bus were narrowed to 32 bits, then it would only transmit 4 bytes on each clock pulse. Likewise, if it were widened to bits then it would send 16 bytes per clock pulse.

Think of the falling edges or down beats of the memory bus clock as hooks on which the memory can hang a rack of 8 bytes to be carried to the CPU.

## The difference between bandwidth and latency

Well, for one thing latency is a way to measure speed. More seriously, though, the best way to explain the difference is like this using a pipe as an example: Bandwidth has to do with how wide or narrow a pipe is. Latency has to do with the contents of the pipe; how fast it moves from one end to the next.

• High Latency vs Low Bandwidth – Impact on Web Performance
• What is Latency?
• Understanding Bandwidth and Latency

Latency and Bandwidth — Cause and Effect There is a cause and effect when it comes to latency and bandwidth. In other words, one will affect how the other functions.

And ultimately, the final outcome is the speed of your internet connection. What is a Good Latency? A good figure for latency, like bandwidth or anything internet related, is relative. What are you going to be using the internet for?