Correct answer is C. SNMP (Simple Network Management Protocol) is a TCP/IP sub-protocol that operates at the Application layer (Layer 7) of the OSI model. It's designed for network management, allowing network administrators to monitor and control network devices.
NFS is an application-level protocol that operates at the Application layer (Layer 7) of the OSI model, but it's not specifically a TCP/IP sub-protocol.
Correct answer is C. SNMP (Simple Network Management Protocol) is a TCP/IP sub-protocol that operates at the Application layer (Layer 7) of the OSI model. It's designed for network management, allowing network administrators to monitor and control network devices.
NFS is an application-level protocol that operates at the Application layer (Layer 7) of the OSI model, but it's not specifically a TCP/IP sub-protocol.
The correct answer is C. SNMP.
Here’s why:
UDP (A) operates at the Transport Layer (Layer 4) of the OSI model, not at Layer 7.
MAC (B) refers to the Media Access Control protocol, which operates at the Data Link Layer (Layer 2).
SNMP (C), or Simple Network Management Protocol, is a protocol that operates at the Application Layer (Layer 7) for managing and monitoring network devices.
NFS (D), or Network File System, also operates at Layer 7, but the question asks for a specific TCP/IP sub-protocol, and SNMP is more appropriate as it directly deals with network management.
D. NFS
The OSI model's Layer 7 is the Application Layer, where protocols related to specific network services operate. NFS (Network File System) is an application-layer protocol that allows file access over a network.
● Application (Layer 7 or L7): This layer identifies and establishes availability of communication partners, determines resource availability, and synchronizes communication.
● Presentation (Layer 6 or L6): This layer provides coding and conversion functions (such as data representation, character conversion, data compression, and data encryption) to ensure that data sent from the Application layer of one system is compatible with the Application layer of the receiving system.
● Session (Layer 5 or L5): This layer manages communication sessions (service requests and service responses) between networked systems, including connection establishment, data transfer, and connection release.
● Transport (Layer 4 or L4): This layer provides transparent, reliable data transport and
end-to-end transmission control.
● Network (Layer 3 or L3): This layer provides routing and related functions that enable
data to be transported between systems on the same network or on interconnected networks. Routing protocols are defined at this layer. Logical addressing of devices on the
network is accomplished at this layer using routed protocols such as Internet Protocol
(IP). Routers operate at the Network layer of the OSI model.
● Data Link (Layer 2): This layer ensures that messages are delivered to the proper device
across a physical network link.
● Physical (Layer 1 or L1): This layer sends and receives bits across the network medium
(cabling or wireless links) from one device to another. It specifies the electrical, mechanical, and functional requirements of the network, including network topology,
cabling and connectors, and interface types, and the process for converting bits to electrical (or light) signals that can be transmitted across the physical medium.
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