Resposta de referência
Among an incident responder's most important tasks are examining the technology ecosystem's components and their interactions and looking at traffic patterns to monitor for and resolve potential security-relevant events. An understanding of network functionality is, therefore, foundational. If an interviewer asks any technical questions, assume at least one of them will be an in-depth question about the operation of a network protocol. The question might focus on any of the following levels of the networking stack:
- High -- e.g., "How does the TLS handshake work in TLS 1.3?"
- Middle -- e.g., "How does the TCP three-way handshake work?"
- Low -- e.g., "What are the elements of an Ethernet frame?"
The only way to prepare for such questions is to know the material cold. If you don't, now's a good time to bone up. To refresh your memory, look at some packet capture data, perhaps using a tool such as Wireshark, or review a book such as Mark Sportack's TCP/IP First-Step, which explains the topic in depth. As you prepare, quiz yourself, and practice explaining the material to someone else.