Look behind pretty much any office computer these days and the chances are that it is connected to the network by an ethernet cable. I can remember when the connectors on the end of ethernet cables were round and when there were other competing network types.
The way ethernet protocol works is rather like a drunken barroom conversation. Your computer waits for a gap and then shouts whatever it wants to send. If someone shouts at the same time, your machine will stop shouting and wait again for a gap. All in all, it’s a terribly impolite conversation.
IBM used to have a network protocol called token ring. That was much more polite. There was a token that whizzed around the network. If a computer on the network wants to say something, they have to wait for the token to come round, grab it and then say what they want to say. Every computer waited it’s turn and there was no shouting. The downfall of the token ring network was speed. Being polite is not as efficient as shouting. Token Ring was harder to set up as unlike ethernet, a token ring network had to be “started up” to get a token into the network.
Now that we have 3G cellular networks and wi-fi, there is no need for a wire at all, which is just as well. It would be incredibly dull if you had to plug a cable into your mobile every time you wanted to do a google search or look at where you are on a map.
Most hotels will charge you for wi-fi access and it seems like the posher the hotel, the higher the cost. I don’t know how a hotel receptionist can keep a straight face when they explain to you that not only does your $250 room rate not include wi-fi, but the charge is $25 per day for access. I have no objection to anyone making a living, but I do object to profiteering.
Of course some places offer free wi-fi, but it is rarely free in both senses of the word; cost and freedom. More and more, free wi-fi will require you to register. Often, they will need you to click on a link in an email to confirm your email address. Sometimes, they will even send you a completely random user ID and password – something you don’t have a hope of remembering. If you are on a mobile, it means you are going to need to hunt around for a pen and paper to make a note of it.
Not only that – but many of them will kick you out after a predetermined time, which means that pretty much every time you go to use the Internet – you have to go through the whole palaver of logging back in again. If you are going to offer free wi-fi – please make it completely free.
- Description of OSI layers (pratapblog.wordpress.com)
- How to Network a Printer With a Router (routergurus.wordpress.com)
- Evaluating low cost USB to Ethernet converters (olimex.wordpress.com)
- Pro’s And Cons Of Ethernet (techwench.com)