# Heartbleed Answers {.unnumbered}

These answers cover the Heartbleed project checkpoints. They keep the same safety boundary as the lessons: explain the vulnerability, reason about bytes and records, and use local fixtures instead of live targets. Read them as a map back through the proof-of-concept, not as a spell to point at random servers.

- [Heartbleed Context and Safety](01-heartbleed-context-and-safety.ipynb)
- [TLS Handshakes and Ports](02-tls-handshakes-and-ports.ipynb)
- [Client Hello and Bytes](03-client-hello-and-bytes.ipynb)
- [Sockets and Records](04-sockets-and-records.ipynb)
- [Heartbeat Proof of Concept](05-heartbeat-proof-of-concept.ipynb)