Welcome to ComputerGS (www.computergs.online) – Your trusted platform for Computer Awareness for SSC, Banking, Railway, UPSI, STENO & Computer Operator Exams.
In this SEO-optimized post, we will learn Computer Networking in simple and exam-oriented language.
📌
Networking is the process of connecting two or more computers or devices to share data, resources, and information.
Networking allows:
File sharing
Internet access
Printer sharing
Communication between devices
📌 Types of Computer Networks
🔹 1. LAN (Local Area Network)
Covers small area
Used in school, office, lab
High speed
🔹 2. MAN (Metropolitan Area Network)
Covers city
Larger than LAN
🔹 3. WAN (Wide Area Network)
Covers country or world
Example: Internet
📌 Network Topologies
Network topology means physical or logical arrangement of devices.
🔹 Star Topology
All devices connected to central hub
Easy to manage
🔹 Bus Topology
Single main cable
Cost-effective
🔹 Ring Topology
Devices connected in circular form
🔹 Mesh Topology
Each device connected to multiple devices
Highly reliable
📌 Network Devices
🔹 Router
Connects different networks.
🔹 Switch
Connects devices within LAN.
🔹 Modem
Converts digital signals into analog and vice versa.
🔹 Hub
Simple device to connect computers.
📌 Transmission Media
🔹 Wired Media
Twisted Pair Cable
Coaxial Cable
Optical Fiber
🔹 Wireless Media
Wi-Fi
Bluetooth
Satellite
📌 OSI Model (7 Layers)
OSI stands for Open Systems Interconnection Model.
Physical Layer
Data Link Layer
Network Layer
Transport Layer
Session Layer
Presentation Layer
Application Layer
The OSI model defines how data is transmitted over network.
📌 Important Networking Protocols
| Protocol | Full Form | Use |
|---|---|---|
| TCP | Transmission Control Protocol | Reliable communication |
| IP | Internet Protocol | Addressing |
| HTTP | Hyper Text Transfer Protocol | Web browsing |
| FTP | File Transfer Protocol | File transfer |
| SMTP | Simple Mail Transfer Protocol | Email sending |
| DNS | Domain Name System | Converts name to IP |
📌 IP Address
An IP Address is a unique number assigned to each device on a network.
Types:
IPv4
IPv6
📌 Advantages of Networking
✔ Resource sharing
✔ Fast communication
✔ Centralized data management
✔ Cost-effective
📌 Disadvantages of Networking
❌ Security risks
❌ Virus spread
❌ Network failure affects all users
📌 Importance for Competitive Exams
Frequently asked topics:
LAN, MAN, WAN difference
OSI model layers
Network devices
Protocol full forms
Topologies
Important for:
SSC CGL, CHSL, IBPS PO, Railway, UPSI, State Exams.
🏆 Conclusion
Networking connects computers and devices to share resources and data efficiently. Understanding network types, topologies, devices, and protocols is essential for computer awareness in competitive exams.
For more Computer Notes, MCQs and Practice Sets visit:
👉 ComputerGS – www.computergs.online
No comments:
Post a Comment