What is cloud computing? How does virtualization work on say, VirtualBox? What role does virtualization play on a cloud computing platform?
Take a look at Mesh Potato (https://villagetelco.org/mesh-potato/) and B.A.T.M.A.N. (https://en.wikipedia.org/wiki/B.A.T.M.A.N.). How are these different from OLPC's IEEE 802.11s protocol? Use layers to explain.
What are the advantages of IPv6 over IPv4. Why is security often considered to be a major advantage in IPv6. Is it really true? Explore https://ipv6friday.org/blog/2012/03/ipv6-security-part-one/
What are the primary differences between TCP and UDP. Would you recommend UDP or TCP for a voice over IP phone call? Justify your choice.
What are the different kinds of VPNs. Describe different scenarios where you would use each of these approaches. How is SSL/TLS VPN different from a traditional VPN?
Why is a mobile phone network called a cellular phone network? Use a diagram to describe. How is 3G cellular different from 4G cellular?
How is a public cloud platform like Amazon Web Services different from a private cloud platform like OpenStack? What role does orchestration play in managing such cloud platforms?