参考回答
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.