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Comment Re:PCs aint expensive (Score 5, Insightful) 452

Honestly, this is the solution. Unless you and your coworkers are working for free, the man hours you will waste on transitioning and people having issues with the new machines, be it not knowing the file system or the differences between MS Word and LibreOffice. You should run the numbers and find out.
The machines you need, over their projected lives of 4 years cost $X per employee per day. That $X is likely less than 30 minutes. Is it likely that the new systems will cost you more than the same amount of man-hours in conversion and support?

Comment Re:Why separate layers? (Score 2) 149

Most things don't use the entire stack.
TCP/IP needs to be seperate layers because you don't want to use TCP for everything.

Everything on the internet has an IP address, so that is the universal internet layer. You can put TCP or UDP or any number of more obscure layers on top of that.

Most applications squish the sesson,presentation,application layers into one, keeping them seperate is optional, there isn't a separate encapsulation header for each just a session flag to keep track the individual connection.
Under the IP layer (network) you have the data-link and physical layer. data-link is your MAC address (this is neccesary) and physical is your wire, there isn't a protocol there generally, though there is for WIFI for example which doesn't use wires.

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