QUESTION
(a) Describe the role of DNS root servers in the Internet network.
(b) What do you understand by the handover concept in a mobile network?
(c) List five methods which can be used to secure a LAN?
(d) An end user has reported that he is not getting connection to the main server. Assuming that the computer of the user and the server are connected to a switch, write down a procedure for troubleshooting the above problem using
(i) A command in the operating system.
(ii) Physical inspection.