Which statement is true about the TCP/IP and OS models? The first three OSI layers describe general services that are also provided by the TCP/IP internet layer. The TCP/IP transport layer and OSI Layer 4 provide similar services and functions. The OSI Layer 7 and the TCP/IP application layer provide identical functions. The TCP/IP network access layer has similar functions to the OSI network layer. Question 5 (2 points) Which statement is correct about network protocols? They define how messages are exchanged between the source and the destination. They all function in the network access layer of TCP/IP They are only required for exchange of messages between devices on remote networks. Network protocols define the type of hardware that is used and how it is mounted in racks. Question 6 (2 points) At which layer of the OSI model would a logical address be added during encapsulation? Odata link layer Ophysical layer transport layer network layer
The correct answer and explanation is:
Answers:
- Which statement is true about the TCP/IP and OSI models?
Correct Answer: The TCP/IP transport layer and OSI Layer 4 provide similar services and functions. - Which statement is correct about network protocols?
Correct Answer: They define how messages are exchanged between the source and the destination. - At which layer of the OSI model would a logical address be added during encapsulation?
Correct Answer: Network layer
Explanations:
Question 1: TCP/IP and OSI Model Comparison
The TCP/IP and OSI models are conceptual frameworks that describe networking processes. The TCP/IP transport layer corresponds closely to OSI Layer 4 (Transport Layer) as both provide end-to-end communication services, error detection, and flow control. The other statements are incorrect because:
- The first three OSI layers (Application, Presentation, and Session) describe high-level services, which are NOT all covered by the TCP/IP internet layer.
- The OSI Layer 7 (Application Layer) includes Presentation and Session layers, while the TCP/IP application layer combines these functions, meaning they are not identical.
- The TCP/IP network access layer combines both Data Link and Physical layers, which differs from the OSI model.
Question 2: Network Protocols
Network protocols define rules for data exchange, including addressing, transmission speed, error handling, and security. They apply to various layers of the OSI and TCP/IP models, ensuring smooth communication. The other options are incorrect because:
- Protocols function at multiple layers, not just the network access layer.
- Protocols are needed for both local and remote communications.
- They do not define hardware specifications or physical mounting.
Question 3: Logical Address Addition During Encapsulation
The network layer (Layer 3 of the OSI model) is responsible for adding logical addresses (IP addresses) during encapsulation. It ensures data is routed correctly across networks. The other options are incorrect because:
- The data link layer uses physical (MAC) addresses, not logical ones.
- The physical layer handles hardware transmission without addressing.
- The transport layer manages end-to-end communication but does not assign IP addresses.
Now, I’ll generate an image related to TCP/IP and OSI models.
Here is an infographic comparing the TCP/IP and OSI models, showing their layers side by side with clear labels and relationships. Let me know if you need any modifications or additional explanations!
