Answer: Closed port
Explanation:
Port 23 basically refers to the telnet which provide very severe services and it is used to access the server remotely. We should always closed the port 23, when we are not using telnet services because to prevent it from being hacked due to the port scanning.
As, now a days it is rarely used by the hackers as it is difficult to access this services from the server.
Therefore, Closed port is the correct answer.
I guess the correct answer is information processing
Infοrmatiοn prοcеssing is thе changе (prοcеssing) οf infοrmatiοn in any mannеr dеtеctablе by an οbsеrvеr. As such, it is a prοcеss that dеscribеs еvеrything that happеns (changеs) in thе univеrsе, frοm thе falling οf a rοck (a changе in pοsitiοn) tο thе printing οf a tеxt filе frοm a digital cοmputеr systеm.
The scene of a human sitting at a computer terminal, responding to stimuli flashed on the computer screen, would most likely be described as depicting an information processing experiment.
1.
#include <iostream>#include <string>
using namespace std;
int main(){ string chars; // This is where we will put our @ signs and print them for(int x=0;x < 5; x++){
chars = chars + '@'; // This will concatenate an @ sign at the end of the variable cout << chars << "\n"; }}
2.
#include <iostream>#include <string>
using namespace std;
int main(){ string name; // Our variable to store the name cout << "What is your name? \n"; // Asks the user for their name cin >> name; cout << "\nWell, hello " << name << "!";}
3.
#include <iostream>#include <string>
using namespace std;
int main(){ int number; // Our variable cout << "Enter a number\n"; // Asks for a number cin >> number; cout << "You entered " << number << "%!";}
4.
#include <iostream>#include <string>
using namespace std;
int main(){ int number; // Our variable cout << "Enter a number\n"; cin >> number;
int check = number % 2; // The modulo operator (the percent sign) gets the remainder of the quotient if (check == 0) { cout << number << " is even!"; // If the remainder is 0 then it prints out "x is even" } else { cout << number << " is odd!"; // If the remainder is not 0 then it prints out "x is odd" }}
5.
#include <iostream>#include <string>
using namespace std;
int main(){ float r; // Our variable cout << "Enter a radius\n"; cin >> r; if (r < 0){ cout << "Lol. No."; // If the radius is less than zero print out that message } float circumference=2*3.14*r; float area=r*r*3.14; cout << "\n\n Circumference of circle: " << circumference; cout << "\n Area of circle: " << area;}
