T<span>he IP packet header is what tells an IP-based host what to do with the packet that was received.
</span>The TCP/IP<span> model describes the </span>protocols used by the Internet. The third layer is the Network layer and in the case of the Internet (the Internet Protocol IP). <span>The </span>Internet layer<span> is responsible for addressing, packaging, and routing functions.</span>
At layer 3 the IP header is exposed and so filtering or firewalls can be applied to IP addresses.
Answer:
myString=myString.toUpperCase();
Explanation:
In java to change all characters of a string to upper case we use .toUpperCase() method.It will convert string to upper case.
Implementation in java.
import java.util.*;
class Solution
{
public static void main (String[] args) throws java.lang.Exception
{
try{
Scanner scr=new Scanner(System.in);
System.out.print("Enter a string:");
String myString=scr.nextLine();
myString=myString.toUpperCase();
System.out.println("string in upper case : "+myString);
}catch(Exception ex){
return;}
}
}
Output:
Enter a string:hello
string in upper case : HELLO
"keep text only" icon from control drop down.
Answer:
If you can pick two:1/4 If you can pick one: 4
Explanation:
Common Sense
Solution :
It is given that :
The digits 0 through 9 in hexadecimal have their usual meanings. But letters A through F function like the digits and it means digits 10 through 15, respectively.
Now the base of a hexadecimal is 16.
Now we know from 0 to 9 
A, B, C, D, E, F
Now the maximum two digits hexadecimal numbers are = F F
So, F F 
= 255
