📝 TCP/IP example of Communication Protocols

Q1. A network administrator wants to block all inbound traffic for a specific service. At which layer should the firewall inspect packet headers to enforce this rule?

💡 Difficulty: easy | ✅ Correct: A

Q2. A web client sends an HTTP request that travels down the protocol stack. Which layer is responsible for adding the TCP header before the segment is handed to the network layer?

💡 Difficulty: medium | ✅ Correct: B

Q3. A large IP packet must be divided because the underlying network supports a maximum transmission unit of \(1500\) bytes. After fragmentation at the data‑network layer, which layer on the receiving host reassembles the fragments into the original packet?

💡 Difficulty: hard | ✅ Correct: D