Update README.md

Author: dhruva-code

README.md

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 # network-pentesting-checklist
 Network pentesting checklist, and tools. Open for all security researchers and professional to modify the checklist.
+
+Network penetration testing checklist V-1.0 provides the phase-wise test cases.
+It gives a clear workflow for security researchers, security professionals, and penetration testers.
+The checklist is divided into categories as below:
+
+1) Network pentesting test cases and
+2) Host based pentesting test cases.
+
+Each category has nine phases as below:
+
+a. Reconnaissance
+b. Foot-printing
+c. Scanning
+d. Enumeration
+e. Target-Mapping
+f. Exploitation
+g. Gaining-access
+h. Post-exploitation
+i. Clearing tracks