3. A, (first choice)
4. C (Third choice from top)
Answer: OSI system is called Open System Interconnection because It provides the collection of protocols for the connection of different system to connect with any dependence on any other system or network.
Explanation: Open system interconnection establishes a connection between the different system for the communication purpose using several protocols and software standards .It has no dependency or any network or other system to do the functioning and works using the seven layers of the OSI architecture.Thus, that is why OSI system known as open system.
Answer:
Authorization is granting permission for admittance. ACLs provide file system security for protecting files managed by the user. Rule-Based Access Control can be changed by users.
Explanation:
Answer:
True
Explanation:
Some collection of classes or library functions grouped as one name space. A class which belongs to one namespace is different from the class which belongs to another namespace. we can identify a class uniquely with it's namespace .
for ex:
in c#.net
using system;
System.IO;
here System is the namespace which contains class IO
namespace contains any number of classes . In one namespace we can't define two classes with same Name. We can define two classes with same name in different namespaces
