Actual Packet : A PHY Layer question
Actual Packet : A PHY Layer question
(OP)
Hello,
a) My node generates a packet ( a PAM Signal in Ethernet , or 64-QAM in WiFi)
b) When the packet reaches the switch/access point and let us presume that the packet has to go to the 4.2.2.2 (Public DNS)., what will happen to the original signal ( that is generated by my node (laptop) ) , i know for a fact that the signal will be restored and amplified at the switch (Ethernet) or Access point (Wi-Fi).
c) But during subsequent hops the signal is copied and restored, so it is no longer the signal that is generated by node,it is generated by the switching/routing device.
I just want a confirmation if the original signal from the node will be just copied into the a temporary cache and then the switch will generate its own reconstructed signal.

So in the circuit switched network there is just one signal from end to end, and that is the one that is generated by the Laptop, but in packet switched network, each of the signal is not the same in the sense each hop will generate the original signal , but the original signal from the laptop traverses up to the AP and the AP will take care of the functions of regenerating.
Thanks
Bharat C P
a) My node generates a packet ( a PAM Signal in Ethernet , or 64-QAM in WiFi)
b) When the packet reaches the switch/access point and let us presume that the packet has to go to the 4.2.2.2 (Public DNS)., what will happen to the original signal ( that is generated by my node (laptop) ) , i know for a fact that the signal will be restored and amplified at the switch (Ethernet) or Access point (Wi-Fi).
c) But during subsequent hops the signal is copied and restored, so it is no longer the signal that is generated by node,it is generated by the switching/routing device.
I just want a confirmation if the original signal from the node will be just copied into the a temporary cache and then the switch will generate its own reconstructed signal.
So in the circuit switched network there is just one signal from end to end, and that is the one that is generated by the Laptop, but in packet switched network, each of the signal is not the same in the sense each hop will generate the original signal , but the original signal from the laptop traverses up to the AP and the AP will take care of the functions of regenerating.
Thanks
Bharat C P





RE: Actual Packet : A PHY Layer question
http://www.dlink.cc/tag/store-and-forward
The Ethernet switches in my house all mentioned Store and Forward.
RE: Actual Packet : A PHY Layer question
RE: Actual Packet : A PHY Layer question
TTFN

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RE: Actual Packet : A PHY Layer question
There has been some publicity recently about some carriers' practices; I thought that might answer the question you intended to ask.
Mike Halloran
Pembroke Pines, FL, USA
RE: Actual Packet : A PHY Layer question
RE: Actual Packet : A PHY Layer question
Not really, depending on your end purpose. If it's only to get a general idea of what happens, then treating circuits as black boxes that do nothing more than "reconstruction" is more than adequate. Unless you intend to design circuits, anything more in depth is unnecessary. There used to be a time when integrated circuits were relatively young that there were required course in college to learn circuit design, but not anymore, I think.
TTFN

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