If we are talking about the actually root servers, there are 13 redundant names spread out (thanks to anycast) on around 1700 servers located around the world, and the lookup a user would do is cached for 2 days. That mean the highest amount of traffic a system will generate is one request per unique TLD (like .com) per 2 days, and it will fit a single UDP package.
We can then do some guesses about size for questions like "what is the nameservers for .com". Those are a bit larger than most dns queries since the answer is a bit bigger than most, since .com has a lot of nameservers, so lets put it down to 800 bytes. Every 2 day a average use might then, using some guessing, generate maybe 10 kb of traffic, or about 0.015 seconds of watching a 1080p video on youtube.
Everyone used to query the root servers directly from their ISP or corporate edge servers until the big platforms wanted to gather more of everyone's data in the name of "keeping people safe" from "bad ISP's". As with any manipulation campaign there are a few incidents corporate propagandists can site to say, "See! We are protecting you!!" forcing people to debate the issue and knowing the majority will accept the default settings. Blocking all the DoH/DoT resolvers would be trivial for any ISP to do just as I have been doing at home since the inception of DoH.
The root Anycast clusters are absolutely designed to handle the entire internet querying them which I do from Unbound. If one wishes to help reduce load they can enable large memory caches and rewrite min-ttl to something sane to protect the root servers from Amazon EC2's default 5 second ttl and others like them. Blocking known spam and tracking domains also helps reduce the total number of queries. Groups of friends can even further reduce the load by setting up their own DoH/DoT servers using Unbound DNS and sharing the cache and using cron to keep their favorite domains hot in the cache and increasing private by making the crond queries from a VPS node.
Some DNS recursive resolvers have longer-than-desired round-trip times to the closest DNS root server; those resolvers may have difficulty getting responses from the root servers, such as during a network attack. Some DNS recursive resolver operators want to prevent snooping by third parties of requests sent to DNS root servers. In both cases, resolvers can greatly decrease the round-trip time and prevent observation of requests by serving a copy of the full root zone on the same server, such as on a loopback address or in the resolver software. This document shows how to start and maintain such a copy of the root zone that does not cause problems for other users of the DNS, at the cost of adding some operational fragility for the operator.
Groovy. Are there any limiting factors such as processor speed and what is the best software that does it all on Linux? I have no idea what ratio of magic smoke is in the software vs. ratio of magic smoke is in the hardware.
The output of a usb radio like this is a set of IQ values which is the raw data from the ADC. The amount of values (samples) you get is device dependent and also limited by your interface. The RTL SDR 4 over usb can do up to 2.4-3.5MHz. The ADC on that device is 8 bit so you will get two 8 bit, IQ numbers per sample.
You can tune into remote SDR’s people set up to work with this data without having your own device or download recordings others have made.
It is this raw sample data that you then demodulate according to whatever scheme required on the PC side.
A great resource I found was pysdr.org. I had absolutely no background in RF and very little python experience but that guide explains everything from the ground up from how the IQ samples are physically generated and read in an antenna, all the modulation schemes you mentioned, and how to code useful things with the various devices. No affiliation but a great resource.
There are levels to this that can get very expensive very fast depending on what your intent is, and how comfortable you are with programming various FPGAs.
The title of the original article calling the app "activism theater" is also extremely rude. The author prefered being a prick than doing the best to fix the app.
> title of the original article calling the app "activism theater" is also extremely rude
It’s also not wrong.
The app doesn’t seem designed to do what it claims to do. And the developer doesn’t seem interested in remedying that.
Worse, by hosting this on linode, they may be doing our corrupt DoJ and ICE’s work for them in identifying community organizers who could interfere with them down the road.
A Greek friend of mine who applied for a visa to do a PhD in US about a month ago, was required to unlock their social media profile by the US embassy, this is already happening.
Of course its worth making a fuss about it. My social media are private because what's getting shared in it is for close friends and family only. The US government has no right searching through it. This is a big joke and I'm afraid it's only the beginning. Personally, with how things are going, I don't think I'm pursuing a PhD in the US after graduating. What's next, sharing a backup of my private conversations?
I'm afraid we're going into a weird timeline where authoritarian figures in power(not just government) are having immense amounts of data for people, and the technology to go through it without much effort. It's a good time(if it's not to late) for everyone who cares about their privacy to start getting as much as possible outside mainstream social media and centralized accounts(google etc)
I can fake, change or delete my social media. I can't fake, change or delete my biometrics. So it's crazy to me to see people focusing on the least worst violations of their privacy like the government seeing their vacation photos.
>The US government has no right searching through it.
Well they just made it a right. What are rights anyway? Rights are not a natural construct, they're whatever the government decides. So if the government decides one thing, tomorrow it can decide another thing if it wants to.
It's not a US issue, every country you will go to can change their rights willy nilly based on the current boogie man: terrorists, COVID, Russia, Iran, right wing "extremists" etc
In the UK or Germany you can be fined, swatted or arrested for tweets and wrong think. Why? Because government made that a right.
I'm not sure what your argument is. I'm not trying to talk about the semantics of the word right. Yeah every human rule is a social construct, I'm just saying this is bad, and it's only the beginning.
I'm guessing you're a US citizen, because this isn't about the US. Many countries in the world are more or less puppies of the US government, it's not like we're living in an isolated world where the decisions of the US government don't apply to others because they're not US citizens. This is showing a general trend, which doesn't concern just visa applications.
>I'm guessing you're a US citizen, because this isn't about the US.
I'm not and I never said it is, I was just saying it's a bit hypocritical for people to complain about governments wanting to see your social media before letting you in the country, while being OK with giving up your biometrics.
You might say you're also not OK with giving up your biometrics, and then I would say, well why are you going to places that do things you're not OK with? Just stay home or go to other places. Why complain about the politics of countries you're not a citizen of and can't vote? Their country, their rules, only their citizen can enact change.
And BTW, I'm OK with governments wanting to see your social media before letting you in. Where I live in EU, there's a lot of middle eastern "refugees" whose social media is full of support of terrorist orgs and calling for death to Israel. Why would you want to let such people in? Would you want those people living next to you? If they're that brazen and stupid to be so open about extremist beliefs on social media, they don't belong in our society and shouldn't have been let in the first place. Granted that won't stop all these extremists, but it will at least stop the really dumb ones.
I expect my elected government to prioritize the safety of its taxpayers over the privacy rights of foreigners and visitors.
I expect my elected government to obey the Constitution under which it is set up. Treating anyone differently because they exercised freedom of speech is against how the US is supposed to work.
What does your previous comment have to do with it?
Inspecting visitor's social media doesn't break the constitution same as how inspecting their/your luggage at the airport doesn't. Border checks are a thing orthogonal to the constitution.
Employers will also Google you and judge you based on what you said on social media. If your profile is full of swastikas or other schizo shit, you probably won't see an offer. Why shouldn't countries do it? Do you want dangerous people let?
I realize that you aren't from the US, so maybe you don't know how US courts have interpreted the first amendment. The US government cannot prohibit "swastikas and other schizo shit", as distasteful as they are. Your employer is perfectly free to do so, however. Those are two different things in the US.
I thought "toi la mot con Lua" was French for "You, the word with Lua!", the well-known, but not to me, scripting bible.
Turns out I misread the Unicode, and it is actually "Tôi Là Một Con Lừa", which is Vietnamese for "I am a donkey", which probably makes it suitable reading material for yours truly.
In my limited understanding, there are many factors differentiating between antennas, different antennas are better at emitting/receiving at different frequencies, and also there's directionality in the mix . For example a satellite dish and an FM radio antenna are both antennas, they're certainly not the same thing.
Yes, there is no state and state transition matrix, really.
Kalman filters are good where you have a system with a state, and an estimate of the state, and you act on the system, and then you measure the outcome, repeatedly.
Acting on the system and propagating your estimate forward "one step" increases the uncertainty of your estimate, and measuring decreases the uncertainty of your estimate.
