Question

What layer does Protocol NETBIOS 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: Application, OSI Model: Application, Port#: 137-139, Stands for: Network Basic Input/Output System, Function: Session establishment.
B) DOD Model: Data Link, OSI Model: Network, Port#: 88, Stands for: Network Binary Input/Output System, Function: Data link management.
C) DOD Model: Network, OSI Model: Data Link, Port#: 445, Stands for: Network Extended Basic Input/Output System, Function: Extended session control.
D) DOD Model: Physical, OSI Model: Physical, Port#: 80, Stands for: Network Transmission System, Function: Physical data transfer.

Answer 1

The NETBIOS protocol belongs to the Application layer in both the DOD and OSI Models, using Port# 137-139 for name, datagram, and session services. It stands for Network Basic Input/Output System and helps establish sessions and transmit data.

Step-by-step explanation:

The NETBIOS protocol occupies different layers in the DOD model and the OSI Model. When considering its functionality and the way it operates, NETBIOS primarily functions at the Application layer in the DOD model. Similarly, it operates at the Application layer in the OSI Model as well. NETBIOS uses Port# 137-139 for its services, which includes NetBIOS name service on port 137, NetBIOS datagram service on port 138, and NetBIOS session service on port 139. NETBIOS stands for Network Basic Input/Output System, and it plays a critical role in providing services related to session establishment and termination, and transmission of data over a network.

DOD Model: In the DOD (Department of Defense) model, the NetBIOS protocol is associated with the Network layer.

OSI Model: In the OSI model, NetBIOS is associated with the Data Link layer.

Port#: The given port number, 445, is associated with NetBIOS in this context.

Stands for: NetBIOS stands for Network Basic Input/Output System.

Function: NetBIOS is a networking protocol that allows applications on different computers to communicate over a local area network (LAN). It provides session control and name resolution services, facilitating communication between devices on the network.