Interviewing at big four (Apple, Google, Facebook, Amazon)

This is controversial but I believe interviewers have certain positive connotations about the college one graduates from. Did you graduate from Stanford or MIT CS? Good, it already means that you have demonstrated some good desired qualities early on in your life. Interviewer might not let these affect their decision, or so they like to think, but it always is glued to the subconscious mind.  Although more number of years of experience you attain, lesser significant this becomes. That is not to say that candidates graduated from next-grade colleges are ignored, they are also treated as seriously as others, but good background gives you head-start amongst others. What do you think?

Networking is vast area for an interviewer to cover and of course no one expect interviewees to know everything in networking. For fundamentals, you may be asked questions in the following areas: - TCP/IP protocol suite and basic knowledge of protocol this suite entails - Some commonly used application layer protocols likes HTTP, TLS (transport layer) - How a packet travels to a destination - Utility internals - traceroute, ping - How does browser work. Explain what happens after you enter URL until the time it displays the requested resource - Socket programming calls - How does a web server work For professionals in advance level of there careers, say around 10 years plus, you show know at least basics of following concepts: - Proxy servers : forward and reverse proxy - DNS servers - VPNs - IPsec, SSL based - Firewalls - old and modern firewalls and differences. Application layer firewall basics - Load balancers - SDNs - CDN - Cloud computing - openstack