Components of a network $($hosts$,$ switches, routers, links, etc$)$

Protocols: what are they and why we need them

Standards: Their role in defining protocols and examples of them

Difference between packet switching and circuit switching

Rules for data transmission $($line rate, capacity, throughput, transmission time, etc$)$

The main functions of each layer in the OSI stack, and the Internet protocol stack, and understanding

the difference between both stacks