InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Solve : Internet connexion got by a linux computer passed to a win7 computer: Is it real? |
|
Answer» This is a schema of mine: Yes, already been done. It is called microwave communication. Or "Wi-fi", which uses the 2.4, 3.6 and 5 GHz frequency bands. Some textbooks define microwaves as radio frequencies between 1 metre (300 MHz, 0.3 GHz) and 1 millimetre (300 GHz), but a more common definition is anything above 1000 MHz (1 GHz). In order to share an Internet connection, the computer that will do the sharing must have two network cards or ports. Instructions on how to share an Internet connection on a computer using Linux are very widely available indeed. Example https://help.ubuntu.com/community/Internet/ConnectionSharing Microwave is not always an exact definition. Common usage is up to 30 GHz. As Salmon TROUT said, specific bands are signed to avoid conflict with different services. But for for Near Filed communication there is a wide choice of spectrum space. In the future more devices using Near Field will show up in the consumer market. Quote from: Geek-9pm on December 31, 2011, 07:38:40 AM Microwave is not always an exact definition. Common usage is up to 30 GHz. I agree that there is no uniform definition of "microwave" and indeed the bands identified by letters of the alphabet are different in US and European frequency charts, but they all go way over 30 GHz. This is the Radio Society Of GREAT Britain microwave band list: Microwave frequency bands Letter Range (GHz) L 1 to 2 S 2 to 4 C 4 to 8 X 8 to 12 Ku 12 to 18 K 18 to 26.5 Ka 26.5 to 40 Q 33 to 50 U 40 to 60 V 50 to 75 E 60 to 90 W 75 to 110 F 90 to 140 D 110 to 170 When radars were first developed at K band during World War II, it was not realized that there was a nearby absorption band (due to water vapour and oxygen in the atmosphere). To avoid this problem, the original K band was split into a lower band, Ku, and upper band, Ka. I already had the configuration specified in the document Salmon Trout linked to me. Sadly, but nice try. Quote from: maxum on December 31, 2011, 09:28:05 AM Sadly, but nice try. What does this mean? Didn't it work? Quote from: maxum on December 31, 2011, 09:28:05 AM Sadly, but nice try. Which bit are you having a problem with? Using a Linux box as a router?Would this not be done by creating a network bridge (say, br0) between the Wireless lan network device (eg. wlan0) and the wired ethernet (eg. eth1)? By modifying /etc/network/interfaces to include something like this: Code: [Select]auto br0 iface br0 inet dhcp bridge_ports wlan0 eth2 up \ /sbin/iwconfig wlan0 essid trekweb && \ /sbin/iwconfig wlan0 channel 4 && \ /sbin/iwconfig wlan0 mode Master with appropriate changes depending on the specific configuration. Though I'll be brutally honest, I couldn't get the bridge started properly when I was trying to. It is possible, and the above segment is a clue but I've no idea if my wlan0 is just funked out (some wireless tools complain about it too) or what. |
|