Computer Networking › Section F · The link layer and LANs › Topic F.1
Link-layer services
A datagram never crosses the internet in one leap. It is handed from node to node over a chain of separate links, and the link layer is the part of the stack that carries it across each single link.
In this topic
- One hop at a time
- What a link layer may offer
- Framing and link-layer addresses
- Why some links add reliable delivery
- Worked example: how often is a frame corrupted?
- Where the link layer lives
- Worked example: one datagram, three frames
- Broadcast and point-to-point links
- Common mistakes to avoid
- Key takeaways
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