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Questions and Answers
Which layer is responsible for breaking down messages into packets?
Which layer is responsible for breaking down messages into packets?
- Network layer
- Link layer
- Application layer
- Transport layer (correct)
What is the primary function of the link layer in network communication?
What is the primary function of the link layer in network communication?
- Adding the IP addresses of the sender and receiver
- Breaking down message into individual packets
- Enabling transfer of packets between nodes (correct)
- Encoding and decoding the message
If a new software application was introduced, which layer is MOST likely to be affected when a message is sent?
If a new software application was introduced, which layer is MOST likely to be affected when a message is sent?
- Transport layer
- Network layer
- Link layer
- Application layer (correct)
What is a significant benefit of using a layered network model?
What is a significant benefit of using a layered network model?
When IPv4 is replaced by IPv6, which layer is directly affected by this change?
When IPv4 is replaced by IPv6, which layer is directly affected by this change?
Flashcards
Layering in networking
Layering in networking
The process of dividing communication into separate parts (layers) so that each part handles a specific task.
Application Layer
Application Layer
Defines how applications communicate with the network. Handles the encoding and decoding of messages.
Transport Layer
Transport Layer
Responsible for breaking messages into packets, adding sequence numbers to ensure correct reassembly, and managing data flow.
Network Layer
Network Layer
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Link Layer
Link Layer
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Study Notes
Network Layering
- Network layering involves breaking down message transmission into separate, specialized components.
- Each component handles a different aspect of communication.
- The Transmission Control Protocol/Internet Protocol (TCP/IP) model exemplifies this approach.
Layers
- Application Layer: Encodes/decodes messages to be understood by both sender and recipient.
- Transport Layer: Breaks messages into smaller packets, assigning each a unique number and total count. This allows for error checking and reassembly by the recipient.
- Network Layer: Adds sender and recipient IP addresses. This enables the network's routing of the message to the correct destination.
- Link Layer: Facilitates packet transfer between nodes within a network and between different networks.
Benefits of Layering
- Standardization: Enables the development of consistent standards for communication.
- Adaptability: Allows standards to be adapted to new hardware and software developments.
- Modularity: Different software applications can use the same underlying transport, network, and link layers while having their own specialized application layers.
- Independent Improvement: Changes to one layer, like migrating from IPv4 to IPv6, don't require entire reconfiguration of the other layers.
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