About this course
Network Engineer Course
Start your journey to becoming a skilled Network Engineer with this easy-to-follow training program, designed for both IT and non-IT professionals. Whether you're looking to begin a career in networking or enhance your existing skills, this course will equip you with the knowledge and hands-on experience needed to succeed.
No prior technical experience is required—just a willingness to learn and grow in the exciting field of networking!
What You’ll Learn
Networking Basics
Understand how networks work and the roles of routers, switches, and firewalls.
Learn about IP addresses, subnetting, and how devices communicate.
Routing and Switching
Configure and troubleshoot network devices for efficient data flow.
Master essential protocols like OSPF, EIGRP, and BGP.
Network Security
Protect networks using firewalls, VPNs, and secure access policies.
Understand common security threats and how to mitigate them.
Wireless Networking
Design and manage Wi-Fi networks for homes, offices, and enterprises.
Learn best practices for securing wireless connections.
Cloud Networking
Explore how cloud technologies like SD-WAN and hybrid cloud systems work.
Understand the role of networking in cloud computing environments.
Network Automation
Automate repetitive networking tasks using tools like Python and Ansible.
Learn about Software-Defined Networking (SDN) and its benefits.
Hands-On Tools and Techniques
Practice with real-world tools such as Cisco IOS, Wireshark, and packet tracers.
Work on scenarios that simulate real networking challenges.
Why Join?
No Experience Needed: Suitable for absolute beginners & experienced IT & Non IT professionals alike.
Practical Learning: Hands-on training with tools and scenarios you’ll use in real jobs.
Career Growth: Prepare for globally recognized certifications and job roles in networking.
Flexible Learning: Study online at your own pace with expert instructor support.
Who Can Apply?
Beginners: Explore a new and rewarding career in IT networking.
IT Professionals: Expand your skill set and specialize in networking.
Career Changers: Transition into one of the most in-demand roles in tech.
Students & Fresh Graduates: Build a strong foundation to kickstart your career.
Course Details
Duration: 3 Weeks (Flexible Schedule)
Mode: Online with interactive modules and live sessions
Take the First Step Toward Your New Career!
Join now to gain the skills and confidence needed to succeed as a Network Engineer, whether you're starting fresh or advancing your career.
Enroll Today and Transform Your Future!
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OSI Layer
7. Application Layer
6. Presentation Layer
5. Session Layer
4. Transport Layer---TCP and UDP
3. Network Layer
2. Data Link Layer
1. Physical Layer
TCP-Transmission Control Protocol UDP--User datagram protocol
Reliable Unreliable
Connection oriented Connection less
Ack No ack
Sequence No Sequence
Data Communication Voice and Video
Host A----------------------Host B
3-way handshake
---------------------------------->Sync
<----------------------------------Ack + Sync
-----------------------------------> Ack
-----------------------------------> Send Data
<---------------------------------- ack + Send data
------------------------------------> Ack
Terminate the connection
------------------------------------> FIN bit
<------------------------------------ Ack + FIN bit
-------------------------------------> Ack
TCP Header --Size 20-60 bytes
Components
1. Source port number-------4 bytes---Random generated by PC from 1025--65535
2. Destination Port number--4 bytes--1-65535 where 1-1024 is reserved==443
3. Ack Number----------------4 bytes
4. Sequence number-----------4 bytes
5. Window -------------------2 bytes
How many bytes will go from 1 packet- maximum transmission unit
1500 Bytes By default
6. Flag ---------------------2 bytes
Sync
Ack
FIN
URG
PSH--PUSH---when this flag will go that packet will treat first among others
RST--Reset--when this flag will go then connection will terminate
7. Urgent Pointer-------------2 bytes--Priority Data
8. Checksum-------------------2 bytes---Error check
UDP Header
1. Source port number
2. Destination port number
3. Length
4. Checksum
Interview Questions
1. What is TCP? Or difference between TCP and UDP ?
2. what is 3 way handshake ?
3. What is windowing and its size?
4. what is the first ack bit?
5. what is the meaning of reset flag?
6. difference between reset flag and Final bit?
7. Have you done Wireshark ?
Wireshark==it is a tool to do deep inspection of packet or advance troubleshooting
up.13singh@gmail.com
upendra@technokraftserve.com
+1-732-806-1984
The OSI (Open Systems Interconnection) model is a framework that standardizes the functions of a communication system into seven distinct layers: Application, Presentation, Session, Transport, Network, Data Link, and Physical Layers. These layers work together to facilitate seamless communication between systems.
The Transport Layer, responsible for end-to-end communication, employs two key protocols: TCP (Transmission Control Protocol) and UDP (User Datagram Protocol). TCP is reliable, connection-oriented, and ensures data delivery through acknowledgments (ACKs) and sequencing. In contrast, UDP is connectionless, unreliable, and commonly used for real-time voice and video communication. TCP’s reliability stems from its three-way handshake process: Host A initiates a connection with a "SYN" packet, Host B responds with "ACK + SYN," and Host A acknowledges with "ACK." Data transfer follows, with acknowledgments for each packet, and the connection terminates through a process involving "FIN" and "ACK" packets.
A TCP header, ranging from 20 to 60 bytes in size, contains several critical components. These include the source and destination port numbers (used for identifying applications), acknowledgment and sequence numbers (ensuring ordered delivery), and window size (determining the number of bytes sent per packet, typically up to 1500 bytes). Flags like SYN, ACK, FIN, URG, PSH, and RST control connection behavior, while the checksum ensures data integrity. Additionally, an urgent pointer flags priority data.
In contrast, a UDP header is simpler, comprising the source and destination port numbers, length, and checksum.
Key interview questions on these topics include the differences between TCP and UDP, an explanation of the three-way handshake, the concept of windowing, and the role of specific flags like reset and final bit. Tools like Wireshark are often employed to analyze network traffic and troubleshoot issues at the packet level, offering advanced insights into network communication.
Networking Fundamentals
