Initial ~30 min phone interview with recruiter. Logistical questions and ~10 Technical questions relating to networking protocols in layers 2 and 3 of OSI Model (related to their software). Subnet calculation, IPv6, OSPF, other similar broad networking topics. The recruiter doesn't know the answers, so whatever you say is written down and relayed to someone with a technical background. Second interview with manager of pre-sales team who gave a lot of information about the company/software and answers any questions as well as asks some casual questions. Final ~1 hour, in-person interview. The interview consists of a presentation that you make (using slides) on NetBrain's software, followed by questions from the director of sales (from second interview) and a sales engineer. They let you lead the questioning by asking about what you talk about.