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Questions and Answers
The layer responsible for communication between hosts in different LANs is the Network layer.
The layer responsible for communication between hosts in different LANs is the Network layer.
True
The IP address 190.10.120.1 is a hardware address.
The IP address 190.10.120.1 is a hardware address.
False
A hardware address is physical and cannot be changed.
A hardware address is physical and cannot be changed.
True
A hardware address is typically 24 bits long.
A hardware address is typically 24 bits long.
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Hardware addresses are represented in decimal format.
Hardware addresses are represented in decimal format.
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Study Notes
Network Reference Models
- Essential to establish a model or framework to facilitate effective communication in networks.
- Reference models provide guidelines for network implementation and troubleshooting.
OSI Model Layers
- The OSI (Open Systems Interconnection) model consists of 7 layers:
- Layer 7: Application
- Layer 6: Presentation
- Layer 5: Session
- Layer 4: Transport
- Layer 3: Network
- Layer 2: Data Link
- Layer 1: Physical
Network Layer Functions
- Layer 3, or the Network Layer, ensures:
- End-to-end delivery of data across the network.
- Logical addressing to identify devices uniquely.
Communication Protocols
- Protocols are necessary for applications to communicate seamlessly.
- Examples include:
- HTTP (Hypertext Transfer Protocol)
- DNS (Domain Name System)
- FTP (File Transfer Protocol)
- SMTP (Simple Mail Transfer Protocol)
Layer Operations
- Each layer performs specific functions through its designated protocols.
- Each layer adds a header to the data as it processes, which affects the overhead of the communication:
Overhead Considerations
- More headers in a multi-layered approach result in greater overhead, potentially affecting performance.
- Fewer headers lead to reduced overhead, which can enhance efficiency in practical implementations.
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Description
Learn about the need for models and frameworks that enable communication in networks, including guidelines for implementation and troubleshooting. Understand the importance of network reference models in computer networks. Test your knowledge with this quiz!
