Networking technologies to know for Interviews

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