Computer Networking › Section F · The link layer and LANs › Topic F.7
A day in the life of a web page request
Typing a web address looks like one action, yet it sets off a chain of protocols from every layer. Following one request from a bare laptop to a loaded page shows how DHCP, ARP, DNS, TCP and HTTP depend on each other.
In this topic
- The scenario
- Step 1: getting an address with DHCP
- Step 2: ARP for the gateway
- Step 3: resolving the name with DNS
- Step 4: connecting with TCP
- Step 5: the HTTP exchange
- Worked example: what each frame carries
- Worked example: where the time goes
- Common mistakes to avoid
- Key takeaways
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