Network scanning, often referred to as "varredura" in Portuguese, is a process used to identify active devices on a network, discover open ports, and gather information about the network's topology. While the term "varredura" might not directly translate to a specific Windows feature, network scanning is a common task that can be performed using various tools available in the Windows environment.

In Windows, there are several ways to perform network scanning using built-in tools and command-line utilities. Although Windows does not have a dedicated command called "varredura," you can achieve similar results using tools like PowerShell and Command Prompt (CMD).

Examples:

1. Using PowerShell to Scan for Active Devices:

   PowerShell is a powerful scripting language and command-line shell that can be used to perform network scans. Below is an example of how to use PowerShell to scan for active devices on your local network.

   # Define the network range
   $networkRange = "192.168.1.0/24"
   
   # Use the Test-Connection cmdlet to ping each address in the range
   1..254 | ForEach-Object {
      $ip = "192.168.1.$_"
      if (Test-Connection -ComputerName $ip -Count 1 -Quiet) {
          Write-Host "$ip is online"
      }
   }

   This script iterates over the IP addresses in the specified range and uses the Test-Connection cmdlet to check if each IP is reachable.

2. Using CMD with the PING Command:

   While CMD does not have a built-in network scanning tool, you can use the PING command in combination with a batch script to perform a basic scan.

   @echo off
   for /L %%i in (1,1,254) do (
      ping -n 1 -w 100 192.168.1.%%i > nul
      if not errorlevel 1 echo 192.168.1.%%i is online
   )

   This batch script pings each IP address in the subnet and displays which addresses are online.

3. Using NETSTAT to Discover Open Ports:

   The NETSTAT command can be used to display active connections and listening ports on your local machine.

   netstat -an

   This command lists all active TCP connections and listening ports, which can help identify open ports on your machine.

While Windows does not have a direct equivalent to "varredura" as a single command, the examples above demonstrate how to perform network scanning tasks using available tools in the Windows environment. These methods provide a way to identify active devices and open ports, helping you manage and secure your network effectively.