Which OSI model layer represents the cable, wire or network media connecting two or more
computers?

A.
Application

B.
Session

C.
Transport

D.
Physical

Explanation:
When you get down to the wire and cable, you are at the lowest layer, which is the Physical layer
(Layer 1). This is the level that manufacturers must, at a minimum, provide device drivers. This
level includes cable, wire, fiber, as well as microwave and satellite connections. Also running at
this level are non-intelligent hubs, and repeaters.
Incorrect Answers:
A: The Application layer (Layer 7) is the highest layer in the OSI model, and is the farthest away
from the network medium. The Application layer only talks with the presentation layer (Layer 6),
the layer below it.
B: The Session Layer (Layer 5) is a very high layer in the OSI model, and is far away from the
network medium. The Session layer only communicates with either the presentation layer (Layer
6) above, or the transport layer (Layer 4) below.
C: The Transport layer (Layer 4) is a high layer in the OSI model, and far away from the network
medium. The transport layer only communicates with either the Session layer (layer 5) above or
the Network layer (Layer 3) below.