How networks actually work, from the wire to the TLS handshake: the OSI and TCP/IP models, IP addressing and subnetting arithmetic, DNS records and resolution, TCP and UDP behaviour, the HTTP versions, and certificates. Vendor-neutral and precise.
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What each layer is responsible for, which device and which protocol lives where, and how encapsulation works on the way down the stack.
77 total questions
Card #1
The seven OSI layers, in order
Card #2
What does Layer 2 (Data Link) do?
Card #3
What does Layer 3 (Network) do?
1. A switch forwards traffic based on:
2. Which OSI layer is responsible for end-to-end delivery between processes on two hosts?
3. The correct order of OSI layers 1 to 4 is:
1. Layer 2 of the OSI model is the ___ layer.
Hint: Frames and MAC addresses
2. A switch forwards frames using the destination ___ address.
Hint: 48 bits, burned into the interface
3. The layer 4 protocol data unit in TCP is called a ___.
Hint: UDP's equivalent is the datagram
