<!DOCTYPE tutorials [<!ELEMENT tutorials (tutorial)+><!ELEMENT tutorial (name,url)><!ELEMENT name (#PCDATA)><!ELEMENT url (#PCDATA)><!ATTLIST tutorials type CDATA #REQUIRED>]>

Define and explain the importance of the following computer security tools / commands / services:a)Arpb)Dnslookupc)Ipconfig / ifconfigd)Metasploite)Msconfigf)Msinfog)Nbstath)Nessusi)Netstatj)Netusek)Nmap commandsl)Nslookupm)Pathpingn)Pingo)Rootkitp)Routeq)Sam Spader)Snorts)Tracert / traceroutet)Wireshark

Write a method that computes the sum of the digits of an integer. Use the following method header:public static int sumDigits( long n )For example sumDigits( 234 ) returns 9  ( 2+3+4)Hint: use the % operatorSubmit both source code and compiled code ( .java and .class files )Write a method with the following header to display three numbers in increasing orderpublic static void displaySortedNumbers( double num1, double num2, double num3 )Write a test program that prompts the user to enter three numbers and invokes the method to display them in increasing order.Submit both source code and compiled code ( .java and .class files Create a class called MyTriangle that contains the following two methods:/* Return true if the sum of any two sides is greater than the third side */public static boolean isValid( double side1, double side2, double side3 )/* Return the area of the triangle */public static double area( double side1, double side2, double side3 )Write a test program that reads three sides for a triangle and computes the area if the input is valid. Otherwise it displays the input is invalid. See Programming Exercise 2.15 for computing the area of a triangle.Submit both source code and compiled code ( .java and .class files )Write a method that converts milliseconds to hours, minutes and seconds using the following header:public static String convertMillis( long millis )The method returns a string as hours:minutes:secondsFor example, convertMillis( 5500 ) returns a string 0:0:5 and convertMillis( 5555500000 ) returns a string 154:19:10Submit both source code and compiled code ( .java and .class files )