Skip to content

Train & Certify
OCPTProfessional Penetration TesterOffensive security and penetration testing OCFIDigital Forensic InvestigatorEvidence acquisition and digital investigations OCAUTOAutomotive Systems ArchitectConnected vehicles and automotive security ALLAll Certifications
Students
REReverse EngineeringTtp system entry TTPDfirForensic investigative mindset CTFCtfCapture the flag operations ALLCertificationsAll active programs TTPHackathon News
Courses
Library
Labs

Train & Certify
Students
Courses
Library
Labs

Sign in to track your courses and achievements.

Sign in to Ocsaly →

Learn

Dashboard
Who am I
Courses
Challenges
Modules

Achievements

Certifications
Badges

Capture The Flag

CTF
Hackathon News

Nmap Operating System Detection

COURSE LESSON

Continue your learning

Sign in to access your enrolled courses, or view the course details before enrolling.

Sign in View course

Introduction to Low Level Computing - (NO LOGIN REQUIRED TO WATCH FOR THIS SECTION)

How Computers Communicate: CPU, Memory, and Input/Output Explained
Preparing Development Environment
What Happens When You Use a Computer

Computer Science : Computer Arithmetic 101

How Addition Happens in Decimal
Addition Arithmetic in Unsignet Integers
Substraction in Decimal
Substraction Arithmetic in Unsigned Integers
Substraction Arithmetic in Signed Integers

Computer Science : Boolean Algebra 101

Boolean Algebra for Low Level Computing

Computer Science : Computer Internals and Electronics

Introduction to Electronics for Hardware Engineers
Logic Gates and Their Hardware Implementation
Capacitors and Implementations on Circuits
Why Use Inductors on Motherboards
Power Consumption and Transistors
MOSFET Transistors
CMOS Switches in Modern CPUs

Computer Science : Combinational Logic Circuits

Introduction to Logic Circuits
Full Adders
NAND and NOR Gates

Introduction to Ghidra for Computer Science and Ethical Hacking

Understanding How Ghidra Works and Other Important Steps
Ghidra Analyzers and User Interface
Customizing Ghidra and Graphs
Getting Familiar with Ghidra Top Menu Bar

Understanding Low-Level Computing for Ethical Hackers

Introduction to Low Level Computing
From Characters to Bits
Creating Our Instruction Set Architecture CPU

Introduction to Reverse Engineering

Reverse Engineering & Malware Analysis
5 Important Steps in Reverse Engineering and Malware Analysis
Virtualization Environment for Our Work
Using Built-in Tools for System Analysis

Assembly Language

Registers
Flags
Memory Addressing and Endianness
Read and Understand Assembly
Opcodes
Manipulating Memory

Network Security for Ethical Hacking : Nmap

Nmap’s Network Scanning Capabilities
Beginning to Use NSE Scripts
Port Scanning on Servers
Port Scanning Techniques and Interface Selection
Nmap Using Target List and Exclude List with File
Nmap Operating System Detection
Random Port Scanning and Legal Issues

Nmap Masterclass for Cybersecurity

Unique Techniques That You'll Learn in This Section
Advanced TCP ACK and SYN Scan
Advanced ICMP

Reconnaissance with Nmap

Introduction to Reconnaissance
IP Geolocation and Whois using Nmap
Graphical Traceroute

Scanning Web Servers with Nmap

Explanation and What Skills You'll Earn in This Section
Scanning HTTP Methods and Potential Risks
Searching for Digital Gold in the Web Server Maze

Detecing Firewalls

Web Application Firewall and IPS Detection

Introduction to Ethical Hacking and Network Security

Packet Analysis and Networking for Ethical Hackers

OSI Model

How Packet Analysis Works
Hubs Are Best for Us, But Everyone Is Using Switches
How-To’s of Network Sniffing

Getting Started with Wireshark

Why Everyone Is Using Wireshark
Downloading and Installing Wireshark
Installing and Configuring Wireshark and Other Tools
Integrated or External WiFi Adapters
Customizing Wireshark

Capturing Live Packets with Wireshark

Saving and Merging Packets
Starting with Filters in Wireshark
Capture Options
Capture Filters
Display Filters

TCPDump & Tshark

Installing TcpDump and TShark
Working with TShark and TcpDump

Network Layer Structures and Operations

Address Resolution Protocol (ARP)
Internet Protocol (IP) in Theory
Time to Live and Routing Behavior
Structure of TCP
Detailed Analysis of Random TCP Packet
Structure of UDP
UDP Packet Analysis - DNS Response
Full DHCP Communication Packet Analysis
HTTP Packet Structure
HTTP Communication Analysis

Advanced Skills with Ethical Hacking and Network Security

Packets Don’t Lie: Truth in Network Traffic
How a Failed Network Scan Looks
Analyzing Port Scans in Wireshark

Student Assessment Test

Certificate

Explore how Nmap performs OS fingerprinting and network stack analysis to determine the operating system of remote hosts.

Key topics:

Using -O and --osscan-guess
How TCP/IP stack quirks reveal OS type
Accuracy and limitations of OS detection
Combining with version detection for full profile

Learn through courses, technical articles, and interactive modules in cybersecurity, digital forensics, and systems engineering.

[email protected]

Certifications

OCSYS · Systems operations
OCAUTO · Automotive systems
OCPT · Penetration testing
OCMA · Malware analysis
OCFI · Digital forensics
Explore certifications

Explore

Course catalogue
Learning modules
Article library
Learning dashboard
Account settings

Support & legal

Verify a certificate
Terms & conditions
Privacy policy
Disclaimer

© 2026 Ocsaly Academy. All rights reserved.

Tactics. Techniques. Procedures.