Basically, they give you resources and you use them. If you use up all your frequencies then your modem just queues up the data you're sending and sends it when it can. That would mean there's theoretically no need to monitor every single bit you transfer and there's definitely no need to slow your packets. There seems to be an emphasis these days on software-controlled things rather than hardware-controlled things, and that's understandable in a lot of situations. So I could be totally wrong.
Thanks for any input! May 29, 32, 1, , 8, The ISP usually programs your modem to limit your bandwidth. That is how they can give you an upgrade with nothing more than some new firmware or config to the modem. This distributes the policing to s of devices which only have to do a small part of the total job. Sometimes there are physical limits that may be in the chain -- a mbit port on a router or switch for instance.
May 9, 1, 8 12, My understanding of it is besides throttling certain types of traffic like p2p torrents and such that the connection speed is just negotiated between your modem and ISP's machines. They handshake, ISP says, this is the rate you can connect at, take it or leave it. Jul 28, 0 1, Software controlled is mostly done for isp who have different speeds for same network link. There are 2 different ways how to limit bandwidth. Second option that is used, is sending special packet to server and it basically tells "slow down sending data, i cant handle so much".
And this way speed is also reduced, but without much overhead. Oct 13, 0 4, Hi, I have exactly the same question as yours, for a long time. And I really respect your our curiosity. They all have a physical maximum speed, just like ethernet, this is easier to understand, because the hardware operate at a fixed frequency I mean the speed they switch between 0s and 1s , so I ideally, they will transfer at that speed.
But ethernet usually operate at much lower speed than PHY layer speed, the most significant limit is usually at ISP, but other cases also exist, for example you have a very fast ISP link, but a very slow computer, you may still not downloading at max speed, although it's rare. The similar things actually also happens on internal links, for example, you usually not using your SATA at 6Gbps all the time, because your HDD just can't do that fast.
So in the whole transfer lane, there's almost always have some device not working at full speed, because they are waiting for the slowest node, either because of device limitation, or because intentionally limiting such as the stupid ISP.
So maybe our question is: why some device can be working on less-than-max speed, what controls them to back off when they are too fast?
I'm not a expert, and the following is partly based on my mind, read on your own risk For internal links, I think most of them are simply rely on interrupts, when there's no data, they go through a idle loop, if a piece of data comes, they process it.
When they are not working at full speed, they are actually switch between idle and busy loop rapidly, and the "speed" we see is a average. Hope these helps and welcome on further discussing. You must log in or register to reply here. Is it throttling by my ISP? Lying ISP?
From most evidence we have observed, rate caps enforced by many ISPs use the drop packet method, as it is the least expensive method supported on most basic routers.
Well, when a link hits a rate cap and packets are dropped en masse, it can wreak havoc on a network. For example, the standard reaction of a Web browser when it perceives web traffic is getting lost is to re-transmit the lost data. Suppose the manager of the restaurant was told his bonus was based on making sure there was a never a line at the cash register. So, whenever somebody showed up to order food when all registers were occupied, the manager would open a trap door conveniently ejecting the customer back out into the parking lot.
The customer, being extremely hungry, will come running back in the door unless of course they die of starvation or get hit by a car only to be ejected again. Hopefully, you get the idea. When packets are being dropped en masse, the network tends to spiral out-of-control until all the applications essentially give up.
Perhaps you have seen this behavior while staying at a hotel with an underpowered Internet link. Your connectivity will alternate between working and then hanging up completely for a minute or so during busy hours.
This can obviously be very maddening. The solution to shaping bandwidth on a network without causing gridlock is to implement queuing. Queuing is the art of putting something in a line and making it wait before continuing on. Obviously, this is what fast food restaurants do in reality. They plan enough staff on hand to handle the average traffic throughout the day, and then queue up their customers when they are arriving at a faster rate then they can fill orders.
Another benefit of queuing is that wait times can perhaps be estimated by customers as they drive by and see the long line extending out into the parking lot, and thus, they will save their energy and not attempt to go inside. With queuing methods implemented, a bandwidth controller looks at the data rate of the incoming packets, and if deemed too fast, it will delay the packets in a queue.
The packets will eventually get to their destination, albeit somewhat later than expected. Packets on queue can pile up very quickly, and without some help, the link would saturate. Computer memory to store the packets in the queue would also saturate and, much like the scenario mentioned above, the packets would eventually get dropped if they continued to come in at a faster rate than they were sent out.
Most internet applications use a service called TCP transmission control protocol to handle their data transfers. TCP has developed intelligence to figure out the speed of the link for which it is sending data on, and then can make adjustments. When the NetEqualizer bandwidth controller queues a packet or two, the TCP controllers on the customer end-point computers will sense the slower packets and back off the speed of the transfer.
With just a little bit of queuing, the sender slows down a bit and dropping packets can be kept to a minimum. The NetEqualizer bandwidth shaper uses a combination of queuing and dropping packets to get speed under control.
Queuing is the first option, but when a sender does not back off eventually, their packets will get dropped. For the most part, this combination of queuing and dropping works well. So far we have been inferring a simple case of a single sender and a single queue, but what happens if you have gigabit link with 10, users and you want to break off megabits to be shared by users? How would a bandwidth shaper accomplish this? This is another area where a well-designed bandwidth controller like the NetEqualizer separates itself from the crowd.
In order to provide smooth shaping for a large group of users sharing a link, the NetEqualizer does several things in combination. Click on the button below to test your upload and download speeds. Run the Speed Test. Providers do this for several reasons, and it usually manifests as a sloth-like connection.
ISPs have many reasons for throttling your internet connection. But these are the top four culprits:. Cable internet providers sometimes throttle a specific area during times of heavy use. Peak times likely happen between p. Some ISPs limit how much data you can send and receive during one billing cycle. They will reduce your bandwidth if your downloads exceed that limit. Moreover, everything you do requires an upload, too, like requesting access to a website, sending an email, posting to social media, and so on.
All this interaction with the internet uses your monthly data allotment. Any ISP that enforces a data cap must include that information in your service agreement. Some bandwidth throttling has nothing to do with your specific web surfing habits.
Here are a few examples:. All of this is good for ISP but terrible for consumers. Moreover, paid prioritization used to be illegal until the Federal Communications Commission FCC repealed the net neutrality laws in With net neutrality, all ISPs must treat lawful internet data equally.
The legislation was passed in in the US to protect net neutrality. But those protections were repealed in , leaving control of the internet up to corporations who greatly benefit from practices that hurt the free internet and everyone who uses the internet—things like paid prioritization, censorship, and throttling. We support net neutrality because a free and open internet is imperative to free speech in America.
Contact your senator to support net neutrality and the Save the Internet Act. ISPs can throttle internet connections when the customer participates in illegal online activities. It creates a secure, encrypted tunnel between you and a dedicated server. This server then decrypts your data and sends it to the destination in plaintext. This data does not include your IP address or any other information that can link back to you.
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