Course module
Data Communication & Networking (IT Specialist) — NIACL AO 2026 IT SPECIALIST
Explore the module outline and lessons below. Enroll free to begin studying here.
Return to /learn/NIACL-AO-IT-SPECIALIST/data-communication-networking-it-specialist after enrolling
- Lessons
- 311
- Duration
- 25 hr 57 min
- PYQs
- 71
- Practice
- 36
3% of this course's PYQ weight is covered in this module.
Syllabus index
Lessons in this module
Introduction to CN
Basics & Criteria
Modes & Connections
Network Topologies
Types of Networks
Switching Techniques
Transmission Media
OSI Model & Layers
- OSI Models & LayersPdf
- Basics of Open System Interconnection OSI modelDrm Video
- Working of Open System Interconnection OSI modelDrm Video
- Basics of Physical Layer with functionality and dutiesDrm Video
- Data Link Layer duties, services and functionalityDrm Video
- Network Layer duties, services and functionalityDrm Video
- Transport Layer duties, services and functionalityDrm Video
- Session Presentation Application Layer duties, servicesDrm Video
Data Communication
DLL: Access Control
DLL Overview & MAC
ALOHA Protocols
CSMA/CA (Wireless)
Controlled Access
DLL: Flow Control
Basics & Delay Analysis
Stop-and-Wait ARQ
Go-Back-N Protocol
Selective Repeat ARQ
DLL: Error Control
Basics & Hamming Dist
- Basics & Hamming DistPdf
- Types of Error - Single Bit Error - Burst ErrorDrm Video
- Idea of Redundancy for Error DetectionDrm Video
- Idea of Block Coding for Error DetectionDrm Video
- Basics of Hamming DistanceDrm Video
- Minimum Hamming Distance for Error DetectionDrm Video
- Minimum Hamming Distance for Error Detection and CorrectionDrm Video
Linear Block Codes
DLL: Framing
Data Link Layer - Ethernet
Overview and Evolution of Ethernet – IEEE 802.3
Ethernet Frame Format – Preamble, SFD
Manchester Encoding – G.E. Thomas, IEEE, and Differential Manchester Schemes
Net Layer: IPv4 & Proto
Net Layer & IPv4 Basics
Fragmentation & MTU
TTL, Protocol & Checksum
IP Options & Padding
Net Layer: IP Addressing
Classful Addr & Casting
Subnetting & FLSM Design
CIDR & VLSM
- CIDR & VLSMPdf
- Address Depletion in ClassFull AddressingDrm Video
- ClassLess Interdomain Routing - CIDR With ExampleDrm Video
- Rules of Creating CIDR BlockDrm Video
- SubNetting In CIDRDrm Video
- CIDR block representation practice questionDrm Video
- CIDR Practice Question_Drm Video
- CIDR Practice Question_Drm Video
- CIDR Practice Question_Drm Video
- CIDR Practice Question_Drm Video
- CIDR Practice QuestionDrm Video
- Designing subnets for CIDRDrm Video
Net Layer:Routing Protocol
Routing Basics & Flooding
DVR, RIP & Split Horizon
Transport Layer Services
Services, Ports & UDP/TCP
TCP Header & Fields
- TCP Headeers and FieldsPdf
- TCP Header-Source-Destination Port AddressDrm Video
- TCP Header-Sequence Number-Acknowledgement NumberDrm Video
- Idea of Wrap-Around TimeDrm Video
- TCP Header-Header Length FieldDrm Video
- TCP Header-Check Sum FieldDrm Video
- TCP Header-Window Size FieldDrm Video
- TCP Header-Urgent Pointer FieldDrm Video
- TCP Header-Control FlagsDrm Video
- Option Field in TCP HeaderDrm Video
Conn. Mgmt & Reliability
TCP State Transition Diag
TL: Congestion & UDP
Congestion Control Policy
Timers, RTT & SWS
UNIX Socket Programming
UDP Protocol & Header
Application Layer
Email: SMTP, POP & IMAP
WWW Basics & Cookies
HTTP Protocol
FTP, DNS & Telnet
PPP, TCP/IP & VoIP Protocols
Mobile Communication Protocols
Introduction to Web Services
Hardware basics
Repeater, Hub, Bridge & Switch
Router & Gateway
Miscellaneous Topics
Network Security
Basics of Network Security
Cryptography
Encryption Algorithms
Authentication Security
Previous-year questions
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Explore the course
- Quantitative Aptitude
- Reasoning Ability
- English Language
- General Awareness
- C Concepts + MCQs (IT Specialist)
- Java (IT Specialist)
- Python (IT Specialist)
- OOPs (IT Specialist)
- DBMS (IT Specialist)
- SQL (IT Specialist)
- Software Engineering (IT Specialist)
- Data Structure (IT Specialist)
- Operating System (IT Specialist)
- Compiler Design (IT Specialist)
- Computer Architecture (IT Specialist)
- Descriptive Test (Main Exam)