<span>The definition of a class clock. the class has no constructors and three instance variables. one is of type int called hours, initialized to 12, another is of type boolean called isticking, and the last one is of type integer called diff.
</span><span>
public class Clock
{private int hours = 12;
private boolean isTicking;
private Integer diff;}</span>
Network topology is the arrangement of the elements of a communication network. Network topology can be used to define or describe the arrangement of various types of telecommunication networks, including command and control radio networks, industrial fieldbusses and computer networks.
Advantages:
It is easy to handle and implement.
It is best suited for small networks.
Disadvantages:
The cable length is limited. This limits the number of stations that can be connected.
This network topology can perform well only for a limited number of nodes.
Firewalls are connected with a network device which blocks untrusted network forming a barrier in between trusted and un-trusted network.
