Computer Networks (CN) for GATE CSE Exam

Here's the complete tutorial on Computer Networks for GATE CSE Exam. This tutorial will break down the syllabus topics into easy-to-understand sections.

If you have less time to study topic wise in details, you may refer Computer Networks previous year questions topic wise.

1. Introduction to Network Layering

• OSI Model
• TCP/IP Protocol Stack

2. Switching Techniques

• Packet Switching.
• Circuit Switching
• Virtual Circuit Switching

3. Data Link Layer

• Framing
• Error Detection
• Medium Access Control (MAC)
• Ethernet Bridging

4. Routing Protocols

• Shortest Path Routing
• Flooding
• Distance Vector Routing
• Link State Routing

5. IP Networking

• Fragmentation
• IP Addressing
• CIDR Notation
• Support Protocols:
  • ARP (Address Resolution Protocol)
  • DHCP (Dynamic Host Configuration Protocol)
  • ICMP (Internet Control Message Protocol)
  • NAT (Network Address Translation)

6. Transport Layer

• Flow Control and Congestion Control
• UDP (User Datagram Protocol)
• TCP (Transmission Control Protocol)
• Sockets

7. Application Layer Protocols

• DNS (Domain Name System)
• SMTP (Simple Mail Transfer Protocol)
• HTTP (Hypertext Transfer Protocol)
• FTP (File Transfer Protocol)
• Email Protocols

Official Syllabus of Computer Networks for GATE CSE

Here's the complete syllabus of Computer Networks, as per the GATE CSE 2025 official notification:

• Concept of Layering: OSI and TCP/IP Protocol Stacks
• Basics of the Packet, Circuit, and Virtual Circuit Switching
• Data Link Layer: Framing, Error Detection, Medium Access Control, Ethernet Bridging
• Routing Protocols: Shortest Path, Flooding, Distance Vector, and Link State Routing
• Fragmentation and IP Addressing, IPv4, CIDR Notation
• Basics of IP Support Protocols (ARP, DHCP, ICMP), Network Address Translation (NAT)
• Transport Layer: Flow Control and Congestion Control, UDP, TCP, Sockets
• Application Layer Protocols: DNS, SMTP, HTTP, FTP, Email

GATE CS/IT Subject-Wise Weightage

The subject-wise weightage for GATE CSE exam, based on the previous year patterns, is listed below:

Tips For Candidates While Preparing for Computer Networks in GATE Exams

Preparing for the Computer Networks section of the GATE exams can seem daunting, but with the right approach and strategies, you can master the subject effectively. Here are some practical tips to help you prepare:

• Understand the Basics: Before exploring complex topics, ensure you have a strong grasp of basic networking concepts such as the OSI model, IP addressing, and MAC protocols. Understanding these fundamentals will make it easier to tackle more advanced topics.
• Practice Diagrams: Many networking concepts, like routing algorithms and network topologies, are best understood visually. Practice drawing these out to clarify how different processes work and to improve your recall during the exam.
• Solve Previous Year Questions: This is crucial for understanding the type of questions that appear in the GATE exam. It also helps in identifying important topics that are frequently tested.
• Join Study Groups: Discussing with peers can expose you to different perspectives and problem-solving techniques. It also keeps you motivated.
• Simulate Exam Conditions: Regularly practice full-length tests under timed conditions. This will help you manage your time effectively during the actual exam.
• Focus on Application: Understanding how to apply theories in real-world scenarios is critical. Pay special attention to how different protocols work in practice, not just in theory.
• Revise Regularly: Regular revision is key to ensuring that you remember concepts over the long term. Make a revision timetable and stick to it.

This tutorial provides a comprehensive yet straightforward guide to the core concepts of Computer Networks as per the GATE CSE syllabus. By breaking down each topic and explaining it in simple terms, you'll be well on your way to mastering the subject and excelling in your exam.