I was called through Employee referral. I talked to one of the Engineer on team for phone screen, which was very easy. At Onsite, You will be first asked to give 1 hour exam. There were 5 interviewers. First interviewer was a leader in a company and I was very offended the way he was talking to me. His way of interviewing was very disrespectful and he seemed pretty uninterested to talk to me. After that, all other interviews were quite average and overall interview experience was good except first one. Didn't received an offer, which I won't have any way accepted if they would have offered. By overall interview experience, people seemed knowledgeable, but very egoistic, which was one of the reasons, I would have declined offer if they would have offered me.

Applied online, Got a Phone Screen call the next week. They asked me what all I know in pretty detailed way. Next I was invited for an onsite interview, which was pretty long process, In total there were 6 interviews and they asked me everything that I have put on my resume. Mainly the basics about all the protocols of OSI model in each layer.