How to Scan an IP Address? NMAP

With the number of networked devices rising everyday, network administrators must know how to scan their network for devices, track IP addresses, and perform IP address management.

Maintaining good network health and prevent unauthorized users from spying or wasting valuable bandwidth is essential to know for administrators. Network security professionals are expected to not only know how to scan their network to locate devices, but also understand the importance behind IP address management.

In this tutorial, you will learn the basic networking skills using nmap on how to scan a network for IP addresses using the command line. You will use these commands to scan a network with nmap, find specific addresses, select ranges, perform CIDR notation scanning, and using a file to perform the scan.

Switch	Example	Description
	nmap 10.10.1.1	Scan a single IP
	nmap 10.10.10.1 10.110.10.2	Scan specific IPs
	nmap 10.10.10.1-254	Scan a range
	nmap scanme.nmap.org	Scan a specific domain
	nmap 10.10.10.0/24	Scan using CIDR notation
-iL	nmap -iL list.txt	Scan targets from a file
-iR	nmap -iR 50	Scan 50 random hosts
–exclude	nmap –exclude 10.10.1.1	Exclude listed hosts