I am wondering almost all LAN networks are using ethernet.
But do all personal computer NIC use the same line codes / modulation scheme.
Since I have 2 routers/switches and they where both purchased about 8 years a part. If I use either route/switch with my PC they work fine. So I am assuming their must be a universal line code/ modulation scheme for all NIC cards.
If not, I don't understand how the NIC would be able to interpret different modulation/line codes ...etc ?
Is the firmware for the ethernet nic cards and routers/switches program/wired for multiply different line codes/modulation schemes? ( I cann't see how this could be done easily)
This question is really bugging me.
question 2
This question is really a continuation of of the above.
If I plug my computer directly into the modem. The modem must understand how to send/recieve data from my nic card so on the lan side it must use some universal standard line code/modulation scheme which would answer the above question. Obviously the wan hardware side of the modem is just using the ISP providers modulation/demodulation scheme which is QAM. They could only change this provided they change your modem and their equipment to interpret your modem (CMTS) to use the same modulation scheme .
On the lan side they must know that all ethernet device use some universal line code else their modems couldn't be used with all NIC / ethernet devices.
But do all personal computer NIC use the same line codes / modulation scheme.
Since I have 2 routers/switches and they where both purchased about 8 years a part. If I use either route/switch with my PC they work fine. So I am assuming their must be a universal line code/ modulation scheme for all NIC cards.
If not, I don't understand how the NIC would be able to interpret different modulation/line codes ...etc ?
Is the firmware for the ethernet nic cards and routers/switches program/wired for multiply different line codes/modulation schemes? ( I cann't see how this could be done easily)
This question is really bugging me.
question 2
This question is really a continuation of of the above.
If I plug my computer directly into the modem. The modem must understand how to send/recieve data from my nic card so on the lan side it must use some universal standard line code/modulation scheme which would answer the above question. Obviously the wan hardware side of the modem is just using the ISP providers modulation/demodulation scheme which is QAM. They could only change this provided they change your modem and their equipment to interpret your modem (CMTS) to use the same modulation scheme .
On the lan side they must know that all ethernet device use some universal line code else their modems couldn't be used with all NIC / ethernet devices.
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