Sunday, January 6, 2013

Is being near an Ethernet cable dangerous?

Q. Just curious. Someone said it is more dangerous to be near Ethernet cables than it is to have wireless internet flowing through the room.

Please advise if you can thanks!

A. "Is being near an Ethernet cable dangerous?"
Not at all... unless you have it strung out across the floor where you could potentially trip over it and maybe fall and hurt yourself, or it is possible to strangle someone with an ethernet cable, LOL! Seriously that is pretty much the most danger an ethernet cable can pose. it's just a cable like any other cable; it's not even an electrocution risk; it is basically similar to the RJ12 cables your landline phone/s use and is just as harmless.

"Someone said it is more dangerous to be near Ethernet cables than it is to have wireless internet flowing through the room."
WTF?! Neither is harmful in any way at all ! WiFi= high frequency radio waves- lots of devices in everyday use for well over a century now, use radio waves to connect, broadcast and communicate (your radio, TV, cordless phones, RF controlled toys, baby monitors etc etc); if there was any danger, this would be very apparent by now don't you think? Wired telecommunications ( which is basically the same physical tech as that for ethernet) has been around in everyday life EVEN LONGER without any apparent harmful consequences. Whoever told you this BS is either having you on or is totally clueless and ignorant.


How do speed up my file transfer speeds across my home network?
Q. I have a D-Link rangebooster G gold series router which is apparently supposed to have network speeds up to 108mbps or something like that right? I'm trying to transfer some files across but its going at an embarrassing 1.5mbps. I would almost make sense I had just put them on my external hdd first..

is there a way to speed this up?

A. I think there are two problems here that are leading to confusion. I suspect (but I could be wrong) that you're confusing megabits with megabytes. The 108mbps you should be able to get is megabits per second. It's possible that the 1.5mbps you're getting is megaBYTES per second. If you do a file transfer, chances are it will give you a speed in megabytes, rather than megabits. A megabyte is 8 megabits, so you might actually be getting 12megabits per second of your promised 108, rather than the 1.5 you thought you were getting.

Also, that 108Mbit promise has a couple unspoken conditions (probably listed out in fine print as a footnote of a footnote in the Chinese language section of your manual). For instance, since 802.11g only supports speeds up to 54Mbits, you need to have special D-Link wireless cards in order to support that full 108Mbits. Without it, you're only going to get up to 54Mbits.

Also, that 54Mbits is total throughput, not the speed of each connection. So if you're transferring from one wireless computer to another, then you're only going to get (at best) half of that speed (about 27Mbits), since it needs half the bandwidth for the transmission to the router, and the other half for the transmission to the other computer.

Finally, if you take into account this is consumer hardware and you probably don't have ideal conditions at your house, there's no reason why that won't cut the speed in half again, leaving you with about 13Mbits expected speed and 12Mbits actual speed.

All that being said, let me address your question of how to speed this up:

The first thing you should do is eliminate the second wireless leg (if it exists). Put one of your computers close to the router (or the router close to one of the computers) and connect the router to the computer via a wired Ethernet connection. That should provide a hefty boost of speed (it should nearly double).

Next, make sure you have an 802.11G card in your wireless computer. If it's 802.11B, then it will max out at 11Mbits. So getting an 802.11G network card for it will increase your speed dramatically.

Also, upgrade your firmware on your router. If there's a new firmware available, you should be able to get it from DLink's website. This might give a minor speed increase.

If you have any baby monitors, home phones, etc that are "2.4Ghz," turn them off, they can interfere with your wireless signal and slow your transfer speeds.

If you can get your speed up to 40Mbits (5 megabytes per second), then you are doing about as well as can be expected from consumer networking hardware. I doubt you'll get over about 25-30Mbits (3-4 megabytes per second), though.

On a side note, back in college we used to be able to get about 5-10 megabytes per second transfer speed by loading files on an iPod (via 400Mbit Firewire), walking down the hall, and loading them on another computer. You could probably achieve similar results with your external hard drive, as you suggested. So I'd go that route for large transfers such as this.

Good luck!


What are the cons of running Wi-Fi in a home setting?
Q. I want to set my new lap top up to my wireless router. If I used Wi-Fi the signal would run through the kitchen. I've previously tried sending a signal to a desktop computer in the back of my home but it failed to receive it. What kind of distractions could I experience? Does the phone effect a signal? A friend told me my giant speakers also effect the signal? Is this true? What do I need to watch out for to have wireless signal in my house?

A. Wi-Fi is simply data being transmitted over the air in the same way that analogue TV or Radio is.

There are LOTS of things that will interfere with the signal - here are some of the more common ones at home:

Walls (Brick, plaster, most anything!)
Floors (as walls)
DECT telephones
Analogue wireless telephones
Baby monitors (not necessarily yours)
Overhead power cables
Water pipes
Microwave ovens
Televisions
Radios
CB radios
Walkie Talkies (kids often the culprit on these!)
Other wireless networks
HiFi speakers

and so on

There are lots of ways to measure the signal - but my preferred route at home is to use the Homeplug system - it always works and I have the version that is almost the same speed as my broadband - in fact it is my 100mb LAN card that is the bottle neck.

Homeplug sends the data over your existing AC (electrical) cabling and the units can be bought freely on line or eBay.

++++++++++

To answer Hunter's criticism below.

1. Research is key Hunter - here's a couple of links so you can go and buy the right gear

http://cgi.ebay.co.uk/SOLWISE-PL-85PE-85MBPS-HOMEPLUG-ETHERNET-ADAPTER-NEW_W0QQitemZ150148599955QQihZ005QQcategoryZ40995QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
(85Mbps)

http://cgi.ebay.co.uk/2-x-HomePlug-200Mbps-Very-Fast-Ethernet-Over-The-Mains_W0QQitemZ300138577955QQihZ020QQcategoryZ40995QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
(200Mbps which is the version I have)

2. Not knowing is not a problem - not checking makes us look silly.....


Which is the best source for connecting internet throught computer or laptop?
Q. Wired Or Wireless?

A. Wired [ethernet] will give you the most reliable connection at a consistent speed. Actual speed will depend on the package you have signed up to with your ISP an d what speed your phone line can support [if you have ADSL]. However you obviously cannot move the PC or laptop around much if it is hard wired.

If you choose to connect via wifi [wireless] for portability then although you can move the device around the signal will not be as consistent as other other factors affect the connection speed that do not apply to wired ethernet connections.
Such as: the number of competing wireless signals from neighbours etc that may have their own wireless netowrks. The use of other equipment that utilizes the 2.4GHz frequency range [used by all wireless routers, although some newer draft n devices can also access 5GHz frequency range].
Common things that also use the 2.4GHz frequency are baby monitors and microwave ovens.

Positioning of the router [best to position it as high and centrally as poosible for wifi] also affects wireless signal strength [and therefore internet and network speed].
The more walls and floors between the router sand the device connecting by wifi will also degrade and slow the signal.

Basically, a desktop PC should be always connected by ethernet cable [hard wired] to the router/modem, as it is not portable there is no purpose in using wifi.
With a laptop [which is portable and often used in different rooms or even in the garden] a wifi [wireless] connection is best. You can hard wire it but then you can't move it about and use it in different loctions [whole point of a laptop over a desktop]

For getting the best wifi signal strength and range, go for a router/modem that supports the latest draft n standard [IEEE 802.11n]. These devices can utilize the 5GHZ frequency [which is less cluttered by other signals] as well as the 2.4GHz range used by older wifi standards. Some draft n wireless routers can use both these frequencies at the same time, but they are more expensive than normal draft n routers.
To get the best speed and throughput over wireless you will need to have a wireless adapter that supports the draft n standard as well as a router that supports it. most modern laptops have draft n wifi adapter built in but if yours doesn't you can buy a USB dongle to use instead.





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