Day 26: Network Devices – Switch, Router, Hub, and Modem | Class 11 - BSEB Class 11-12 Computer Science: 100-Day Bilingual Guide with MCQs, Solutions and Questions

Day 26 – Chapter 4: Network Devices

Class 11 Computer Science

Introduction to Network Devices (नेटवर्क उपकरणों का परिचय)

Network devices are hardware components used to connect computers and other devices within a network to facilitate data communication.
नेटवर्क उपकरण वे हार्डवेयर घटक हैं जो कंप्यूटर और अन्य उपकरणों को नेटवर्क के भीतर डेटा संचार में सहायता करने के लिए जोड़ते हैं।

1. Switch (स्विच)

A switch is a networking device that connects devices in a LAN and uses MAC addresses to forward data to the correct destination.
स्विच एक नेटवर्किंग डिवाइस है जो LAN में उपकरणों को जोड़ता है और सही गंतव्य पर डेटा भेजने के लिए MAC एड्रेस का उपयोग करता है।

• Function: Filters and forwards data to specific devices.
• Use Case: Office and home networks.

2. Router (राउटर)

A router connects multiple networks and directs data packets between them. It is essential for internet access.
राउटर कई नेटवर्क को जोड़ता है और उनके बीच डेटा पैकेट निर्देशित करता है। यह इंटरनेट एक्सेस के लिए आवश्यक है।

• Function: Routes data between networks and manages traffic.
• Use Case: Internet access in homes, offices, and businesses.

3. Hub (हब)

A hub is a basic networking device that connects multiple devices in a network but does not filter data.
हब एक मूल नेटवर्किंग डिवाइस है जो नेटवर्क में कई उपकरणों को जोड़ता है लेकिन डेटा को फिल्टर नहीं करता।

• Function: Broadcasts data to all connected devices.
• Use Case: Small, simple networks.

4. Modem (मॉडेम)

A modem converts digital signals from a computer into analog signals for transmission over telephone lines, and vice versa.
मॉडेम कंप्यूटर से डिजिटल सिग्नल को टेलीफोन लाइनों पर प्रसारण के लिए एनालॉग सिग्नल में बदलता है, और इसके विपरीत।

• Function: Enables internet access by converting signals.
• Use Case: Internet connection in homes and offices.

Comparison of Network Devices (नेटवर्क उपकरणों की तुलना)

Device	Function	Use Case
Switch	Forwards data to specific devices using MAC addresses	LAN in offices and homes
Router	Routes data between networks	Internet access
Hub	Broadcasts data to all connected devices	Small, simple networks
Modem	Converts digital and analog signals	Internet connection

Practice Questions (अभ्यास प्रश्न)

Multiple Choice Questions (MCQs)

1. Which device connects multiple devices in a LAN?
   (a) Router | (b) Hub | (c) Switch | (d) Modem
2. What is the main function of a router?
   (a) Convert signals | (b) Route data between networks | (c) Broadcast data | (d) None
3. Which device does not filter data?
   (a) Hub | (b) Switch | (c) Router | (d) None
4. What does a modem do?
   (a) Converts digital to analog signals | (b) Forwards data | (c) Routes packets | (d) None
5. Which device uses MAC addresses?
   (a) Hub | (b) Switch | (c) Router | (d) Modem
6. Which device is essential for internet access?
   (a) Router | (b) Switch | (c) Hub | (d) None
7. What is the primary use of a hub?
   (a) Filtering data | (b) Broadcasting data | (c) Converting signals | (d) None
8. What is the use of a modem in networking?
   (a) Managing traffic | (b) Converting signals | (c) Filtering packets | (d) None
9. Which device is best for small, simple networks?
   (a) Hub | (b) Router | (c) Switch | (d) Modem
10. Which device connects multiple networks?
    (a) Hub | (b) Router | (c) Switch | (d) Modem

Answers to MCQs:

1: (c), 2: (b), 3: (a), 4: (a), 5: (b), 6: (a), 7: (b), 8: (b), 9: (a), 10: (b)

Short Answer Questions (लघु उत्तरीय प्रश्न)

1. What is the function of a switch?
   Answer: A switch forwards data to specific devices using MAC addresses.
2. What does a router do?
   Answer: It routes data between networks.
3. What is the primary function of a modem?
   Answer: A modem converts digital signals into analog signals and vice versa.
4. What is the difference between a hub and a switch?
   Answer: A hub broadcasts data to all devices, while a switch forwards data to specific devices.
5. Which device is essential for connecting to the internet?
   Answer: A router or modem.

Long Answer Questions (दीर्घ उत्तरीय प्रश्न)

1. Explain the roles of switches, routers, hubs, and modems in networking.
2. Discuss the differences between hubs, switches, and routers with examples.
3. What are the advantages of using a switch over a hub in a LAN?