1) How many types of firewall are used?
Correct Answer: 3
2) What is the function of a router?
Correct Answer: Forward the packet to the uplinks
3) Which model is used by network switch that works on data link layer?
Correct Answer: OSI model
4) Which devices used in telecommunication that connects two network with different transmission protocol together?
Correct Answer: Gateway
5) What is meant by cryptography?
Correct Answer: Secret writing