Question

What layer does Protocol Fast Ethernet belong to in the DOD model? and in the OSI Model? Port#? What does it stand for and what does it do?

A) DOD Model: Network, OSI Model: Data Link, Port: 100, Stands for: Fast Ethernet, Function: High-speed local area network data link layer
B) DOD Model: Data Link, OSI Model: Physical, Stands for: Fast Data Link Protocol, Function: High-speed data link layer communication
C) DOD Model: Transport, OSI Model: Transport, Port: 150, Stands for: Fast Ethernet Transport Protocol, Function: Transport layer for Fast Ethernet
D) DOD Model: Presentation, OSI Model: Presentation, Port: 300, Stands for: Fast Presentation Protocol, Function: Presentation layer for Fast Ethernet

Answer 1

Fast Ethernet belongs to the Data Link layer in both the Department of Defense (DoD) model and the OSI model. It is designed to support high-speed local area network communications at 100 Mbps, and it is not associated with a specific port number.

Step-by-step explanation:

When examining protocol Fast Ethernet, it is important to understand where it fits within the Department of Defense (DoD) model as well as the Open Systems Interconnection (OSI) model. Fast Ethernet is not associated with a specific port number as it is a networking technology, not a protocol that uses ports, such as those found in the Transport Layer.

The correct categorization for Fast Ethernet in the DoD model is the Data Link layer. In the OSI model, Fast Ethernet also belongs to the Data Link layer. Fast Ethernet stands for a variety of Ethernet standards that carry traffic at the nominal rate of 100 Mbps (the 'fast' reflects a speed that is higher compared to traditional Ethernet). The primary function of Fast Ethernet is to provide high-speed data link layer communication within a local area network (LAN).

Therefore, the correct option is:

B) DoD Model: Data Link, OSI Model: Data Link, Port: N/A, Stands for: Fast Ethernet, Function: High-speed data link layer communication within a local area network (LAN).