The OSI Model

The OSI model is made up of _____ ordered layers

• five

• seven

• four

• six

Layer 3 uses the services provided by ______

• layer 2

• layer 4

• layer 3

• layers 2 and 4

The communication between same layers are governed by an agreed upon series of rules and conventions called ______

• services

• topology

• protocols

• semantics

The processes on each machine that communicate at a given layer are called ________ processes.

• point-to-point

• multi-tasking

• distributed

• peer-to-peer

The physical layer communication is _____

• private

• direct

• via addressing

• indirect

Each layer in the sending machine adds its own information to the message it receives from the layer above it, This information is added in the form of

• headers

• codes

• trailers

• headers or trailers

______ are added to the data at layers 6, 5, 4, 3, and 2

• headers

• trailers

• trailers and headers

• none of the choices

Trailers are usually added only at layer ______

• 2

• 3

• 4

• 5

The machine passing of the data and network information down through the layers of the receiving machine is made possible by a/n ______.

• service

• padding

• interface

• protocol

Layers ________ are the network support layers: they deal with the physical aspects of moving data from one device to another.

• 1, 2, and 3

• 3, 4, and 5

• 4, 5, and 6

• 5, 6, and 7