Free Network basics lessonsNetwork basics · Stage 1 · Layers and devices · Step 2
Encapsulation
Follow a message down the sender's stack, gaining a header at every layer, and back up the receiver's. About 12 minutes.
A router forwards a packet between two networks. How much of the packet does it look inside?
- ADown to the IP header, to find the destination address
- BAll the way to the application message
- CIt forwards the frame without reading anything
Show the answer
Down to the IP header, to find the destination address. Routing is a network-layer job; it doesn't need the transport or application data.
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