To my understanding, when you send a packet to the default gateway, it is going to the next router so it can eventually reach its destination. But how is the data read from one router to another? Doesn't it strip all of the data off of the packet, up to layer 3 so it can travel from one network or another?
I was watching the CBT nuggets video about packet walking and when he was explaining this part, he said that this is only true for LAN networks but when you get to a WAN network, this explanation won't work. What does he mean by this?
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