How does faster speeds over the internet will impact older routers, besides slow downloads?

I am interested in finding how can a router that was designed to work on slow internet speeds, will be impacted in other faster environments?  Can they be hacked?
Jorge LozanoAsked:
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Scott ThomsonCommented:
This is a very broad and basic question.

You need to start with makes/models etc to get a clear picture of what you have to work with.
Also faster internet will not be a problem. But how the router dispenses the internet can be. For example. If you have an ADSL router with 25Mbps and you have wireless g.. You cannot push out the maximum speed of your internet. It wont bottleneck but it just wont be at full speed.

Can you please give some specifics?
Jorge LozanoAuthor Commented:
I am working on a research paper on cyber security, and I want to know if the CPU processing speed on a router is such that can only handle low internet speeds; and exposing these routers to faster internet speeds, I would assume that they will become vulnerable to hack attacks or data corruption.  Typically CPU processing speeds depends on the clocking devices and memory, so exposing those routers to faster data coming in; I would assume that not only they will slow the input processing of data, but also it can compromise the data.  
My experience working with PLC are much in depth, so I am assuming that routers are almost are built with similar framework; and if we expose PLC's with lost of data it will corrupt them.
Scott ThomsonCommented:
I would doubt it. I mean depending exactly on how old you think old is. Routers have been able to process at gigabit network speeds for quite a while. and internet isnt that fast in most countries.

and you could assume that if they have a megabit port that the minimum they can process at is 100 megabits per second or roughly 12 megabytes per second.
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Dave BaldwinFixer of ProblemsCommented:
Comparing routers and PLCs is probably not very useful.  When you connect a router to a network, it is limited to the network speeds that are built into to it.  You can't push more data thru it.  PLCs that I know about are not built for speed in the first place and I can see how they might be overloaded because they were never designed to keep up with the maximum data input rate.
Jorge LozanoAuthor Commented:
Dave, thank you for your reply, the reason why I am researching on this matter, is because the SCADA industry uses mainly PLC's based on Motorola's 68000 families; and when those PLC are on networks they are become vulnerable.  For years they have been using PLC's and their design was solely to be stand alone, and I have not seen any improvement from the industry in trying to modernize their hardware framework; which I think is where the vulnerabilities are for cyber-attacks.  Now that demand of more data is requested from remote locations, these PLCs are connecting via WAN that creates a major vulnerability to the SCADA system.  We in the Electronic Security Industry use also PLC, and with the demand of more information; we are connecting them to WAN as well.  I am giving you this background, since I believe that the CPU they use is where they problems is.  Routers use a more defined CPU that are designed to manage networks at high speeds, while PLC's CPU are designed to work with input and output at low speeds; and I believe the connecting them to WAN it creates a major tasks and vulnerability for the PLC.  Please correct me if I am wrong in my statements.  I do not know know much about the architecture of the routers, but I do know about PLCs'
Dave BaldwinFixer of ProblemsCommented:
Adding the routers does not change any of the issues with the PLCs.  I believe that a correctly operating router will handle traffic at it's rated speed, 10Mbps, 100Mbps, or 1Gbps.  The traffic to the PLCs over the network will be delivered at what ever the local network speed is.  Routers that are connected to higher speed networks have no effect on that either.  I don't believe that the routers have any effect on the problems with the PLCs.  They don't make the problem better or worse.

Of course, uncontrolled access will always be a major problem.  But still, by itself, that has nothing to do with speed.

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Scott ThomsonCommented:
@jorge.
Thats the sort of description you needed to include with your question. It now clearly defines what you are looking for.
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