Internet domain names (such as www.google.com) are managed hierarchically. At the top of the hierarchy is an entity called IANA, the Internet Assigned Numbers Authority, operated on behalf of the Commerce Department.
Not correct. ICANN, the Internet Corporation for Assigned Names and Numbers is under contract to DOC. ICANN has two components: control of the DNS root and control of the IANA. IANA, the Internet Assigned Numbers Authority deals only with numbers: IP addresses, protocol numbers, AS numbers, port numbers, etc. IANA is almost completely unrelated to the DNS.
I buy all of the BAEN books I read because they sell them in formats I like (HTML w/o DRM) and they sell them at prices comparable to the same paperback book I'd buy in the store.
For the rest, I either own the physical book in tandem with the electronic version or I'll backfill my collection once they're published in an acceptable format at a paperback price.
AFAIK, part 18 ISM rules prohibit using the 2400 mhz ISM band for licensed communications. The major licensed use of the 2400 mhz band is for microwave ovens. If you wifi router causes your neighbor's microwave oven to malfunction, you will in fact have to turn it off.;-)
Isn't that what being part of the unlicensed, open, free spectrum means though? Anyone can use it for anything?
No, it only means that anyone can use it. There are still rules about how it can be used; it can't be used for just anything. for example, the maximum transmit power for 2.4ghz is something like 1 watt. If you transmit over that power, you're in violation and the FCC can shut you down.
I fired up Skype and dialed out. Massive failure. For some reason the sound is horrendously choppy and thin sounding. It was completely unusable.
You're experiencing high "jitter." Jitter is the change in delay from packet to packet. If odd numbered packets take 100 ms and even numbered packets take 150 ms then you have 50ms of jitter.
Certain protocols like VoIP and NTP require connections with low jitter in order to perform acceptably.
the people who make jokes about France surrendering often actually believe that France is weak and that their proximity to the Nazis had nothing to do with their country falling.
France helped us win our revolution and we were grateful.
We liberated France from the Germans and we were even.
We liberated France from the Germans *again* and Charles de Gaulle complained that we weren't nice enough to him in the process.
Between De Gaulle's unmitigated arrogance and the sheer stupidity of the Maginot Line, our national opinion of the French has never recovered. You might say we find their behavior rather galling.
How long has Fiber Optics been around? And how many providers have so far implemented it for the public?
The answers to your question are:
1. Physical infrastructure (pies, wires and what not) is generally installed on a 20-25 year cycle. It would be prohibitively expensive to do it more often than that.
2. Passive optical networking (PON), the technology behind FiOS was invented in the late '90s and first attempted commercially in 2003.
So, in 2028 anyone who hasn't deployed PON or a successor is behind the times.
The obvious question is, why are the Chinese so interested in the NYPD computer network?
No, the obvious question is why are the NYPD's computer people so dumb that they're reporting the generic, worm-generated port, web and ssh scans that everybody sees from China and everywhere else as an out-of-the-ordinary hacking attempt?
I'm not defending TWC in any way, but municipal Internet systems are generally a bad idea. They don't keep pace with technology improvements and the cross-subsidy from the grants and what not tends to drive all the commercial systems out of the community.
Altoona PA was a good example. They created a municipal dialup system in the mid-90's because they thought that $20 was too much to pay for dialup. They were still stuck with it in the middle of this decade because they'd driven out the ISPs who would have brought in DSL and Cable modems.
Municipal physical infrastructure (like Utopia out in Utah) is a somewhat better idea. There you reframe the competitive process without ending it.
bandwidth costs nothing once you have the infrastructure in place.
Actually, not so. Unless you're a so-called "tier 1" provider, or more precisely a "transit free" provider, you pay by the 95th percentile megabit for your traffic. A customer who uses 1 megabit *all the time* will cost you between $5 and $100 just for the bandwidth between your network core and the cores of other ISPs, before you even factor in the local infrastructure cost to get that megabit from your network core down to his computer.
FYI, there are 8 transit-free providers, including neither Comcast nor TWC. And they have other costs which replace the direct bandwidth costs. Ain't nothin' free in this world.
If all Time Warner customers decided one day not to check their e-mail or download a single movie, the company's costs would be no different than on a day when every customer was glued to the screen watching one YouTube video after another.'"
Of course, those customers would be glued to blank screens since TWC lacks the capacity to have every customer watching youtube at once. Their network would grind to a halt. And the network expansion necessary to handle all of them watching youtube all day would have a considerable additional cost.
Comcast says it costs them $6.85 per home to double the internet capacity of a neighborhood.
Comcast also says that their users like their service and don't leave it the instant Verizon installs FiOS in the neighborhood. You shouldn't put much faith in what Comcast says.
Eventually the insulation on cables will degrade and they should be replaced. For patch cables this is evident: simply look at them. If they *look* torn up, they *are* torn up. For in-wall cables, the degradation cycle is several decades; they'll be obsolete long before they wear out.
Two-pair Cat-5 was suitable for 100baseTX at 125mhz. Four-pair Cat-5 remains suitable for 1000baseTX, also at 125mhz. Poorly made and/or poorly installed cat-5 will cause errors on gig-e links. If you observe this, replace with cat-5e or cat-6.
The magic in 1000baseT is that they kept the signaling rate (the "baud") at 125mhz, just like 100baseTX. As a result, it works the same on exactly the same cables.
Cat-5e, cat-6, shielded and PIMF (pair in metal foil) cables all reduce the bit error rate and will allow you to get slightly more distance out of your connection.
10-gig-e is not presently expected to work on cables which aren't Cat-6 PIMF shielded. That may change by the time it becomes commonplace but I wouldn't bank on it changing much.
Write web pages - Web Author / Copy Writer Write web pages and javascript - Webhack / Webmonkey / Web User Interface Specialist Write complex back-ends with tens or hundreds of thousands of lines of code in Rails, PHP, Perl, etc. - Software Engineer
I worked in a 4.5 foot high cube, just high enough that you can't see over it when seated. The cube was at the end of the row next to two hallways.
Naturally my PC is located in the rear of the cube, so my back is to the entrance. To my right and rear is a hallway leading to the bathroom. To my left and rear is a hallway leading to the elevators. So pretty much zero privacy.
To my left front is the adjacent cube where my boss sits. The door to his boss's hard wall office is about 10 feet dead astern. The big boss's office (the CTO) is right beside it, about 15 feet behind me.
It was like Office Space with the addition that all the bosses were literally looking over my shoulder.
It's a pressure wave in a physical media. Travels about 300m/s in air, 1500m/s in seawater. Damps out slower in dense media than sparse media, so it travels much further in water and retains its amplitude for longer.
When I played Phil Collins' Another Day In Paradise through a 1000-watt underwater speaker during an acoustics experiment near the Hudson Canyon a decade and a half ago, it was still readily audible to the hydrophone arrays towed by the other ships miles away.
You make a 203 decibel noise next to *anything* and it'll become deaf, including human beings. A vacuum cleaner is only 80 dB and the front rows of a rock concert only 110 dB.
Slashdot Mirror
Internet domain names (such as www.google.com) are managed hierarchically. At the top of the hierarchy is an entity called IANA, the Internet Assigned Numbers Authority, operated on behalf of the Commerce Department.
Not correct. ICANN, the Internet Corporation for Assigned Names and Numbers is under contract to DOC. ICANN has two components: control of the DNS root and control of the IANA. IANA, the Internet Assigned Numbers Authority deals only with numbers: IP addresses, protocol numbers, AS numbers, port numbers, etc. IANA is almost completely unrelated to the DNS.
It's one thing if spores cause an infection- but going to the hospital cause you don't like a smell? I mean come on. Grow a pair, you know?
RTFA. The fridge was full of mold. Many folks are allergic to mold, especially in quantity.
I buy all of the BAEN books I read because they sell them in formats I like (HTML w/o DRM) and they sell them at prices comparable to the same paperback book I'd buy in the store.
For the rest, I either own the physical book in tandem with the electronic version or I'll backfill my collection once they're published in an acceptable format at a paperback price.
Licensed users have priority
AFAIK, part 18 ISM rules prohibit using the 2400 mhz ISM band for licensed communications. The major licensed use of the 2400 mhz band is for microwave ovens. If you wifi router causes your neighbor's microwave oven to malfunction, you will in fact have to turn it off. ;-)
Isn't that what being part of the unlicensed, open, free spectrum means though? Anyone can use it for anything?
No, it only means that anyone can use it. There are still rules about how it can be used; it can't be used for just anything. for example, the maximum transmit power for 2.4ghz is something like 1 watt. If you transmit over that power, you're in violation and the FCC can shut you down.
If the money's good, take the money. You can always start another business but you can't always find someone willing to pay you for your current one.
Remember: you don't have to be the next Google. It only takes a few million to retire and to *anything you want to do.*
I fired up Skype and dialed out. Massive failure. For some reason the sound is horrendously choppy and thin sounding. It was completely unusable.
You're experiencing high "jitter." Jitter is the change in delay from packet to packet. If odd numbered packets take 100 ms and even numbered packets take 150 ms then you have 50ms of jitter.
Certain protocols like VoIP and NTP require connections with low jitter in order to perform acceptably.
the people who make jokes about France surrendering often actually believe that France is weak and that their proximity to the Nazis had nothing to do with their country falling.
France helped us win our revolution and we were grateful.
We liberated France from the Germans and we were even.
We liberated France from the Germans *again* and Charles de Gaulle complained that we weren't nice enough to him in the process.
Between De Gaulle's unmitigated arrogance and the sheer stupidity of the Maginot Line, our national opinion of the French has never recovered. You might say we find their behavior rather galling.
There are a number of real businesses named "Cyberdyne Systems." Good luck to any of them trying to enforce a trademark on the name.
The first thing I did was find the source for and compile the "passwd" program. The SLS distro on several floppy disks didn't include one.
Er... pies = pipes. Like water, sewer, gas. Makes more sense that way.
How long has Fiber Optics been around? And how many providers have so far implemented it for the public?
The answers to your question are:
1. Physical infrastructure (pies, wires and what not) is generally installed on a 20-25 year cycle. It would be prohibitively expensive to do it more often than that.
2. Passive optical networking (PON), the technology behind FiOS was invented in the late '90s and first attempted commercially in 2003.
So, in 2028 anyone who hasn't deployed PON or a successor is behind the times.
Longer version of the story with more facts:
http://www.washingtonpost.com/wp-dyn/content/article/2009/04/21/AR2009042101723.html
He worked as a meter repairman for 16 years. The math adds up fine.
There is no reason that a NYPD network should even open a socket for a connection originating in Asia.
A Japanese traveler about to visit New York on business decides to check the crime stats at http://www.nyc.gov/html/nypd/html/crime_prevention/crime_statistics.shtml to get a perspective on what to watch out for with respect to crime in New York.
A US soldier stationed in Korea is about to end his tour of duty and wants to check out the job openings at http://www.nyc.gov/html/nypd/html/careers/careers.shtml
The obvious question is, why are the Chinese so interested in the NYPD computer network?
No, the obvious question is why are the NYPD's computer people so dumb that they're reporting the generic, worm-generated port, web and ssh scans that everybody sees from China and everywhere else as an out-of-the-ordinary hacking attempt?
I'm not defending TWC in any way, but municipal Internet systems are generally a bad idea. They don't keep pace with technology improvements and the cross-subsidy from the grants and what not tends to drive all the commercial systems out of the community.
Altoona PA was a good example. They created a municipal dialup system in the mid-90's because they thought that $20 was too much to pay for dialup. They were still stuck with it in the middle of this decade because they'd driven out the ISPs who would have brought in DSL and Cable modems.
Municipal physical infrastructure (like Utopia out in Utah) is a somewhat better idea. There you reframe the competitive process without ending it.
bandwidth costs nothing once you have the infrastructure in place.
Actually, not so. Unless you're a so-called "tier 1" provider, or more precisely a "transit free" provider, you pay by the 95th percentile megabit for your traffic. A customer who uses 1 megabit *all the time* will cost you between $5 and $100 just for the bandwidth between your network core and the cores of other ISPs, before you even factor in the local infrastructure cost to get that megabit from your network core down to his computer.
FYI, there are 8 transit-free providers, including neither Comcast nor TWC. And they have other costs which replace the direct bandwidth costs. Ain't nothin' free in this world.
If all Time Warner customers decided one day not to check their e-mail or download a single movie, the company's costs would be no different than on a day when every customer was glued to the screen watching one YouTube video after another.'"
Of course, those customers would be glued to blank screens since TWC lacks the capacity to have every customer watching youtube at once. Their network would grind to a halt. And the network expansion necessary to handle all of them watching youtube all day would have a considerable additional cost.
Comcast says it costs them $6.85 per home to double the internet capacity of a neighborhood.
Comcast also says that their users like their service and don't leave it the instant Verizon installs FiOS in the neighborhood. You shouldn't put much faith in what Comcast says.
Eventually the insulation on cables will degrade and they should be replaced. For patch cables this is evident: simply look at them. If they *look* torn up, they *are* torn up. For in-wall cables, the degradation cycle is several decades; they'll be obsolete long before they wear out.
Two-pair Cat-5 was suitable for 100baseTX at 125mhz. Four-pair Cat-5 remains suitable for 1000baseTX, also at 125mhz. Poorly made and/or poorly installed cat-5 will cause errors on gig-e links. If you observe this, replace with cat-5e or cat-6.
The magic in 1000baseT is that they kept the signaling rate (the "baud") at 125mhz, just like 100baseTX. As a result, it works the same on exactly the same cables.
Cat-5e, cat-6, shielded and PIMF (pair in metal foil) cables all reduce the bit error rate and will allow you to get slightly more distance out of your connection.
10-gig-e is not presently expected to work on cables which aren't Cat-6 PIMF shielded. That may change by the time it becomes commonplace but I wouldn't bank on it changing much.
Write web pages - Web Author / Copy Writer
Write web pages and javascript - Webhack / Webmonkey / Web User Interface Specialist
Write complex back-ends with tens or hundreds of thousands of lines of code in Rails, PHP, Perl, etc. - Software Engineer
I worked in a 4.5 foot high cube, just high enough that you can't see over it when seated. The cube was at the end of the row next to two hallways.
Naturally my PC is located in the rear of the cube, so my back is to the entrance. To my right and rear is a hallway leading to the bathroom. To my left and rear is a hallway leading to the elevators. So pretty much zero privacy.
To my left front is the adjacent cube where my boss sits. The door to his boss's hard wall office is about 10 feet dead astern. The big boss's office (the CTO) is right beside it, about 15 feet behind me.
It was like Office Space with the addition that all the bosses were literally looking over my shoulder.
How do sound waves work.
It's a pressure wave in a physical media. Travels about 300m/s in air, 1500m/s in seawater. Damps out slower in dense media than sparse media, so it travels much further in water and retains its amplitude for longer.
When I played Phil Collins' Another Day In Paradise through a 1000-watt underwater speaker during an acoustics experiment near the Hudson Canyon a decade and a half ago, it was still readily audible to the hydrophone arrays towed by the other ships miles away.
You make a 203 decibel noise next to *anything* and it'll become deaf, including human beings. A vacuum cleaner is only 80 dB and the front rows of a rock concert only 110 dB.
Cold turkey is the only way to go. I quit caffine 5 years ago. I felt like crap for two weeks. Then it got better.