Network Security Assignment Help | Network Security Homework Help | Network Security Project Help| Online Network Security Help

Network security starts with authenticating the user, commonly with a username and a password. Since this requires just one detail authenticating the user name —i.e. the password, which is something the user 'knows'— this is sometimes termed one-factor authentication. With two-factor authentication, something the user 'has' is also used (e.g. a security token or 'dongle', an ATM card, or a mobile phone); and with three-factor authentication, something the user 'is' is also used (e.g. a fingerprint or retinal scan).

Once authenticated, a firewall enforces access policies such as what services are allowed to be accessed by the network users. Though effective to prevent unauthorized access; this component may fail to check potentially harmful content such as computer worms or Trojans being transmitted over the network. Anti-virus software or an intrusion prevention system (IPS) helps detect and inhibit the action of such malware. An anomaly-based intrusion detection system may also monitor the network and traffic for unexpected (i.e. suspicious) content or behavior and other anomalies to protect resources, e.g. from denial of service attacks or an employee accessing files at strange times. Individual events occurring on the network may be logged for audit purposes and for later high-level analysis.

Communiqué between two hosts using a network may be encrypted to maintain solitude.

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Basic example of Network Security programming is as follows :

NETWORK SECURITY PROGRAMMING EXAMPLE -------------

How to make a server to allow the connection to the socket 6123?

import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

public class SocketDemo {
public static void main(String[] args) {
try {
ServerSocket server = new ServerSocket(6123);
while (true) {
System.out.println("Listening");
Socket sock = server.accept();
InetAddress addr = sock.getInetAddress();
System.out.println("Connection made to "
+ addr.getHostName()
+ " (" + addr.getHostAddress() + ")");
pause(5000);
sock.close();
}
}
catch (IOException e) {
System.out.println("Exception detected: " + e);
}
}
private static void pause(int ms) {
try {
Thread.sleep(ms);
}
catch (InterruptedException e) {
}
}
}

Result:
The above code sample will produce the following result.

Listening
Terminate batch job (Y/N)? n
Connection made to 112.63.21.45


 

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