Topics: Network Devices
5. Repeater:
● Function: Amplifies and regenerates weakened signal to extend the reach of a network cable.
● Layer: Physical
● Intelligence: None, simply repeats received signal without processing.
● Application: Extending network reach over long cable distances.
● Advantages: Simple solution for signal strength issues.
● Disadvantages: Introduces latency, can amplify noise and errors, not scalable solution.
6. Router:
● Function: Connects and manages multiple networks, directing data packets to the correct destination.
● Layer: Network (and above)
● Intelligence: High, maintains routing tables, chooses paths based on network topology and protocols.
● Application: Connecting LANs, WANs and the internet, routing network traffic efficiently.
● Advantages: Enables communication between different networks, optimizes traffic flow, improves security.
● Disadvantages: More complex and expensive than other devices, requires configuration.
7. Bridge:
● Function: Connects two similar networks (typically LANs) at the data link layer.
● Layer: Data Link
● Intelligence: Filters data based on MAC addresses, reducing traffic between networks.
● Application: Separating network segments while allowing communication, extending LANs.
● Advantages: Improves network performance by segmenting traffic, reduces collisions.
● Disadvantages: Limited functionality compared to routers, not suitable for complex network configurations.
8. Gateway:
● Function: Connects different types of networks (e.g., LAN to WAN) and performs protocol translation or conversion.
● Layer: Varies depending on protocol and functionality
● Intelligence: High, handles data conversion, security functions and application-level communication.
● Application: Connecting to the internet, integrating different network types, providing security and access control.
● Advantages: Enables communication between incompatible networks, provides additional services like security and filtering.
● Disadvantages: Complex and expensive, requires specific configuration for different protocols and networks.
MCQ
1. Which device converts digital signals to analog signals for phone lines or cable?
a) NIC b) Switch c) Modem d) Router
Ans: c) Modem.
2. Which device operates at the physical layer and simply broadcasts all received data?
a) Hub b) Bridge c) Repeater d) Gateway
Ans: a) Hub.
3. Which device intelligently connects devices and forwards data only to the intended recipient?
a) Switch b) Router c) Repeater d) Hub
Ans: a) Switch.
4. Which device amplifies and regenerates weakened signal to extend the reach of a network cable?
a) Hub b) Router c) Repeater d) Switch
Ans: c) Repeater.
5. Which device connects and manages multiple networks, directing data packets to the correct destination?
a) Bridge b) NIC
c) Router d) Gateway
Ans: c) Router.
6. Which device connects two similar networks at the data link layer and filters data based on MAC addresses?
a) Router b) Bridge c) Gateway d) Modem
Ans: b) Bridge.
7. Which device connects different types of networks and performs protocol translation or conversion?
a) Switch b) Repeater c) Hub d) Gateway
Ans: d) Gateway.
8. Which device is the essential component for any device participating in a wired network?
a) Bridge b) Router c) NIC d) Gateway
Ans: c) NIC.
9. Which device offers improved performance over hubs by reducing network traffic and collisions?
a) Repeater b) Hub c) Switch d) Modem
Ans: c) Switch.
10. Which device introduces latency and amplifies noise and errors, but is a simple solution for signal strength issues?
a) Hub b) NIC c) Switch d) Repeater
Ans: d) Repeater
11. What is the main disadvantage of using a hub compared to a switch?
a) Higher cost b) Lower security c) Inefficient data transmission due to flooding d) Requires configuration
Ans: c) Inefficient data transmission due to flooding
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