What you'll learn

Confident at Answering Networking Related Question

Open up opportunities to Networking/System programming Companies

Get familiar with Linux and Learn Linux System programming side by side

Build Github portfolio, strengthen your employability

Decorate your Resume with projects done in this Course

Learn Networking concepts at all Layers of OSI Model

Course content has been designed keeping the MNCs interviews in Mind

Coding Assignments and Projects

Become a Networking professional Developer

Master designing and Writing TCP/UDP Servers in Linux environment

Build & Decode the complete packet from scratch

Concept of Packet Encapsulation

L2 and L3 Routing, Vlan based Routing

Description

Through this course you will be able to :

1. Understand the Functioning of TCP/IP Stack (OSI Model). Understand the function of each layer in TCP/IP stack in good detail.

2. Explain the L2 routing concepts - Mac Addresses and ARP

3. Explain the L3 routing concepts - IP Addresses and IP protocol

4. Understand the procedure of Dynamic construction of L3 Routing Table

5. Understand various ways to design a Linux TCP/UDP server program in C

6. Understand Socket programming in C

7. Understand the Networking devices functioning - L2 switch and L3 router

8. Understand packet Journey through the layers of TCP/IP stack

9. Design and implement HTTP Webservers from scratch

10. Read and manufacture the network packets from scratch

11. Understand the concept of TLVs

12. Concept of packet Encapsulation

13. Understand Domain Name System (DNS)

14. Virtual LANs (VLANs) and Routing in VLANs

15. Broadcast Domain and Collision Domain

We Understand - Networking by its nature is inclined towards being a theoretical subject of study. To arouse the interest of the students ,we elaborate each and every topic of this course through an assignment or project.

This course is thorough. We explain the design, discuss the code flow and then guide the audience how to implement the particular concept design in detail in a step by step manner. All you need is a Linux OS running on your system to do this course.

Who should do this course

This course is meant for UG Computer science students, job seekers and professional developers. This is MUST do course for those who want to join MNCs as a developer. The topics covered in this course are of utmost importance from interviews aspects and students graduating in computer science and looking to seek an opportunity in MNCs as a developer should have Networking concepts at his/her finger tips. Better to have done Networking under graduate course, not mandatory. Job seekers trying for the position of Networking developers in product based MNCs System software development including Networking is an evergreen area. Internet will not going to be doomed ever.

Pre-requisite

There is no pre-requisite for this course, however, it shall be advantage if you know a little of C. We designed this course assuming student is a complete bner in Networking and we raise the level of course gradually as we move from Basic to advance Networking concepts.

Also, Please just do not sit and watch my codes. Write your own codes, even if it is same as mine !

We have a strong reasons to choose C as a language for this course:

1. The entire core networking development work is being done in C in industry. So, this reason alone is good enough that you should learn network development in C if you are aiming to join industry as a network protocol developer.

2. Network equipment need to interact with underlying hardware - the ASIC chips. What could be a better language other than C when it comes to interact and program the hardware.

3. C is middle level language - not as low as assembly, neither as high as Java/Python. In C, its the programmer's responsibility to write every line of code to get the task done, unlike Java/Python which provides rich rest of libraries to do the most tasks for you. Using High Level Languages for learning network programming would obscure the low level details of networking - that is what is going behind the scenes. If you are are bner in network programming, you must learn things from scratch and only C provides you the opportunity to do that. So, you must do all your assignments in C.

4. Networking is all about cooking up the packets and sending it out of wire. C will allow you to cook packets exactly the same way as you would like them to appear on wire. Lot of Bit level programming.

5. If you are a bner in Networking, pls refrain from learning network programming in High Level Languages such as Java Or Python. It is not job oriented thing to do in networking domain.

No Third Party libraries

Whatever logic you implement, you need to implement it from scratch. This course do not suggest taking help of any third party library to get the jobs done. Use of external libraries completely defeats the purpose of the course. However, it is recommended to use third party libraries for commonly used data structures such as linked lists/Trees/Queues etc which saves a lot of implementing these data structures.

What else along with the course

If you are aiming to become a developer, then, besides strong in Data structure and Algorithms, you should have clarity of concepts related to other Linux utilities. Networking is all about system programming, and you would be interested in learning other linux concepts of p importance such as Inter Process Communication, Remote Procedure Calls etc. Please take a look at my other courses in this regard. These courses will summed you up as a more competitive developer in Networking & System Programming domain.

See what students are saying about this course

Just Take a Look at These Top Rated Reviews (Browse review section to verify these reviews)

What a Fantastic Course!!! I really appreciate the efforts Abhishek has put in this course. He has put his sweat and heart into it. The way he explains things keeps you hooked on to this course. He directly gets TO THE POINT without beating around the bush. No author of any networking book can explain things like Abhishek is doing. What Abhishek is doing is that he is explaining the Meat of the subject. One would have to read 10 books to understand this. or perhaps more. There was a hunch in my heart that dont know networking clearly. This course meets my expectations with respect to content, clarity and teaching style with proper presentations. This course improves your understanding and removes the fear of not knowing...not only that, it injects a good amount of confidence about your knowledge of Networking...Thanks for coming up with such a course. Thanks Again.

Come across right course at right . This course seems cover all important areas of networking. Author explains the topics in good detail and with good pace. This course looks like designed to beat technical interviews.

Great Course, instructor is very thorough and provide quick guidance and clear any doubts promptly with high availability. I really enjoyed this course. Networking has been a tough subject for me to learn, but this course has made it quite easy. I now have my concepts thoroughly clear ! Thanks Abhishek, and Udemy.

I am working as Firmware/Embedded eeer, and the courses from this guys are goddamn blessing. In the real industry, as he mentioned earlier, all network programming or Linux system programming must be implemented with C cuz C is a perfect language for accessing memory spaces and customizing serial communication with other chips. In the real industrial fields, no one is gonna teach you. You are the only one who needs to figure it out by yourself cuz everyone wishes you not to excel in workplace. Only one person can be a manager or supervisor. Take this guy's courses. Needless to say, quality guaranteed. If I could do hacking on this site, i am gonna crash his lectures. I do not want other people to get benefits from his lectures. It would be best if he makes a lecture for "making Operating System from scratch" :)

Warning : This course has auto system-generated subtitles which may not be perfect. Please disable subtitles as per your convenience.

Curriculum

0. Setting up Linux Development Environment on your machine

For those who are not familiar with Linux Installation/environment

1. OSI Model Vs TCP/IP Stack

Data Encapsulation and Data Decapsulation

Headers Cascading

Ingress and egress Journey of packet through a TCP/IP Stack

Big Picture

2. Multi-node setup environment on your machine

Setup Multinode Cluster of Virtual machines on your machine

Local and Remote Subnets

Layer 3 Route Semantics

Configure Layer 3 routes in nodes

Understand L3 Routing table semantics

3. Subnetting and IP address

Understand Subnets

Differentiate between local and remote subnets

IP Address assignment scheme/policy

Data Delivery

Understand MAC addresses and their use

Calculation of Networking ID, Broadcast address and Cardinality of a subnet

Understand the relationship between L3 routers and Subnets

Understand Point-to-Point links

MAC layer and IP rules of packet rejection/acceptance

Broadcast Addresses

4. Layer 2 Networking concepts

L3 Router as a gateway to subnet

Protocol Identifier fields at each layer

Ethernet header format

How Ethernet hdr makes L2 routing possible

ARP (Address resolution protocol)

ARP table population and use

Step by Step ARP protocol functioning

Assignment on ARP

Layer2 Switch - How it works

MAC address table

Step by Step description of L2 Switch functioning

Problem of Layer Thrashing

5. Layer 3 Networking concepts

Relationship between Layer2 and Layer3 routing

Explained the dependency of two layers over each other

Configuring Layer 3 routing table

Semantics of a Layer 3 route

Layer 3 route look up

Concept of Longest prefix match

IP Header - fields you should know

Network Layer Operations

Step by Step description of L3 routing routing

Loopback interface - purpose and configuring loopback interface

Exercise on Layer 3 route installation, routing and forwarding of traffic

BroadCast and Collision Domain

6. Dynamic Construction of L3 Routing Table

Phase 1 - Neighbotship database management

Phase 2 - Creation of Link State Database

Phase 3 - Shortest Path first Algorithm

Calculation of Final Routing Table

7. Virtual LANs (VLANs)

LANs and why they are outdated today

VLANs - The purpose

802.1Q VLAN hdr

Rules of Vlan Tagging

Vlan Aware L2 Switches

Vlan based L2 routing

Other Vlan Benefits

8. Router to Vlan Forwarding

Convept of SVI interfaces

SVI - VLAN Binding

Router to Vlan Forwarding - Step by Step

9. Inter Vlan Routing

Two Step Process

From Src host Machine to Gateway L3 router

From Gateway L3 router to Dst host machine

Exercise and more examples

10. Network troubleshooting tools

How ping works - ICMP protocol description

Networking applications troubleshooting utilities - ping, wireshark, tcpdump

Capturing the packets and examine its contents using tcpdump

11. Transport Layer

Layer Goals

Contrasting Layer2, Layer 3 and Layer 4 together

TCP and UDP - Properties of two protocols

TCP Vs UDP

Understanding TCP in Detail

Concept of Headers stacking

Concept of port numbers

Linux System call interface

12. Socket programming concepts

Socket Programming Design

Select System call

Accept System call

Concept of Multiplexing

Server State machine

13. Application Layer

Different ways to implement Sockets

on Top of Transport layer

on Top of Network Layer

on Top of Data link layer

Designing HTTP Webserver from scratch

HTTP Webserver Implementation

Custom application sockets

14. Domain Name System

What is DNS

DNS Architecture and Design

FQDN

Hosting a website

DNS Resolver

DNS Query types

Iterative Query

Recursive DNS Query

Reverse DNS Query

Summary

15. IP-in-IP Encapsulation/Tunneling

What is IP-in-IP Encapsulation

Why we need IP-in-IP Encapsulation

How Encapsulated packet is routed in the network

Two scenarios using IP-in-IP Encapsulation

16. Concept of TLVs

What are TLVs

Why we need TLVs

Writing a TLV decoder

Benefits of TLVs in Network communication

STREAMS - Data Structure

TLV (De)Serialization using STREAMS




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