In second round they were bombarding questions. This was knowledge based round. Questions were not tough but one of the interviewer attitude was not good and was very rough.
Networking questions, wpa2, wep, http vs https architectural difference, negative test cases for notepad, radius server, api testing, stress vs load test, oops, basic os questions, can we hide ssid, osi layers in some detail, tcp dump, frame vs packet, bubble sort, sort huge file and many other questions like http error codes, put vs post vs get etc.