Cisco Software Engineer I interview questions

Interview for a summer internship with Cisco Systems, Reading. The interview was 4 hours long, first part was writing C code on the whiteboard, namely the point-in-a-polygon algorithm. Second question was related to networking - explain what happens on each OSI layer when you open up a website. Second part - written test, 1 hour - the typical tricky questions for software engineering position. Last part - general questions and discussion on future plans, etc. Interviewers were polite and friendly, good experience.