-=PCTechTalk=- Re: router/hub question TOM
- From: "T. Hunt" <ilrover@xxxxxxxxxxxxxx>
- To: pctechtalk@xxxxxxxxxxxxx
- Date: Thu, 24 Feb 2005 11:01:24 -0500
It doesn't really matter who said it, my question was 'what do you mean
by that statement'.
Tom
Bashful Bob wrote:
> Hi Tom
> I did use the word split, not my professor, please see the post I answered
> (which is still included here).
>
> Life is what happens in between plans.
>
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> ----- Original Message -----
> From: "T. Hunt" <ilrover@xxxxxxxxxxxxxx>
> To: <pctechtalk@xxxxxxxxxxxxx>
> Sent: Wednesday, February 23, 2005 9:48 AM
> Subject: -=PCTechTalk=- Re: router/hub question
>
>
>
>>For ICS, some clarification may be in order: Any connection made using
>>ICS and a network is shared among ALL the computers accessing the
>>connection at a particular time. The processing that the host computer
>>does to enable ICS doesn't take away from the speed of the connection,
>>only from the resources of the host computer.
>>
>>If only one computer is accessing the internet over the modem,
>>regardless whether it is the ICS host or any other system, then it will
>>be able to take advantage of the full bandwidth of the connection.
>>However, if a second computer begins to access the internet, then the
>>maximum bandwidth available to either computer is half of the total
>>bandwidth available over that particular connection. A third computer
>>will reduce the maximum bandwidth to 1/3 of the total available.
>>
>>"Under ICS, the connection (modem 56K) is NOT split." I'm not sure what
>>you (or the professor) means by this statement. The connection is not
>>split in the sense that a certain portion is allocated to each system,
>>whether used or not. But the total bandwidth is shared among all the
>>systems using the connection at any one time. And it is not necessarily
>>equal.
>>
>>If system A is downloading a large file that would normally consume all
>>the available bandwidth, and system B logs on and starts to browse the
>>web, going to very simple webpages, system A's bandwidth will only be
>>reduced by as much as system B needs to fully load the webpages, say by
>>10%. But if system B starts to download files as well, then the
>>bandwidth available to each system for its task is half of the total
>>bandwidth available over the modem connection at that time.
>>
>>I wouldn't use the word 'split', I think 'shared' is a better
>>description. But however you divide the bandwidth, no more can be used
>>than the maximum available over the modem. You can never have more than
>>100% of whatever the connection speed is, whether 14400, 26000 or
>
> 53000bps.
>
>>Think of it in terms of water and a faucet in your kitchen. If you want
>>to fill a bowl with water, you set it in the sink and turn the water on
>>full to fill the bowl as quickly as possible. You are now using the
>>maximum amount of flow (bandwidth) available. But if you decide to fill
>>another bowl at the same time, you hold it under the faucet so that it
>>catches half the stream coming out of the faucet. Now the flow coming
>>out of the faucet is the same but both bowls are filling at half the
>>rate they were before. Once the smaller bowl is filled and removed, the
>>original bowl is again filling at the maximum rate. The flow out of the
>>faucet never changes and remains at its maximum throughout the filling
>>of both the bowls.
>>
>>I don't recommend ICS for 2 reasons. The first is that the host
>>computer gives up some of its resources to process the connection for
>>the other systems. The second is that the host computer has to be on
>>for the other systems to connect. If you are sharing a dial-up
>>connection, real-world speeds dictate that each computer have a modem
>>and connect on its own to access the internet and then log off when
>>finished. The internet sharing should be accomplished by the computer
>>operators not the computers themselves. This is what Troth posted earlier.
>>
>>If you have a high speed connection, that connection should be shared
>>using the technology available; routers, switches and firewalls. A
>>network should be set up that allows each and every computer to access
>>the connection independently of the others. They will still have to
>>'share' the available bandwidth but with high speed connections that is
>>not generally a problem since there is enough bandwidth to comfortably
>>go around.
>>
>>ICS doesn't affect the connection speed itself but sharing that
>>connection reduces the maximum available to any one system when multiple
>>systems are online.
>>
>>Tom
>>
>>Bashful Bob wrote:
>>
>>>Hi Troth
>>>I regret the lengthy time for this reply, I wanted to check with some
>>>computer professors at school to verify the accuracy of what I am going
>
> to
>
>>>say because I am in disagreement with what you had to say about ICS
>
> slowing
>
>>>down the modems speed.
>>>
>>>Under ICS, the connection (modem 56K) is NOT split. It sends and
>
> receives at
>
>>>its normal speed ( the speed that is set up during the handshake) and
>
> the
>
>>>speed of the modem is not reduced by ICS. The messages come into the
>
> gateway
>
>>>(computer with the modem) through the NIC card and that puter process
>
> the
>
>>>messages and sends them out on the modem at the modems normal speed. The
>>>modem does not know one puters message from another. All the modem does
>>>(basically) is translate a digital signal to a analog signal and is the
>>>point of attachment for the computer to the telephone wires. The gateway
>
> may
>
>>>be slowed down by processing its stuff plus processing the stuff from
>
> other
>
>>>computers using the ICS on the LAN before sending the messages out on
>
> the
>
>>>net through the modem. If any slow down is noticed, I think it is due to
>
> the
>
>>>gateway puter slowing down for processing. Therefore, in my opinion, it
>
> is
>
>>>the best thing to have the fastest computer as the gateway with the
>
> modem.
>
>>>The ICS configuration sets up the gateway to use either a NAT address
>>>translation or a port address translation for the other computers.
>>
>>>----- Original Message -----
>>>From: "~OoO~" <sirtroth@xxxxxxxxxxxxx>
>>>To: <pctechtalk@xxxxxxxxxxxxx>
>>>Sent: Thursday, February 17, 2005 8:55 AM
>>>Subject: -=PCTechTalk=- Re: router/hub question
>>>
>>>
>>>
>>>
>>>>Don hit it on the nail. Main computer needs to be on, and you're
>
> splitting
>
>>>>an already slow connection (modem 56K). So, if you have two people
>
> working
>
>>>>on it, it'll be very slow. If possible, best to just split the phone
>
> line
>
>>>>and run it to each computer. Have each system go online when needed.
>
> And,
>
>>>>using the proxy program you can share the connection if absolutely
>>>
>>>necessary
>>>
>>>
>>>>that both be on it.
>>>>
>>>>---Troth
>>
>>
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