Concept Exercise Chapter 14 Name:
Date: Class:


Cisco Exercises - Semester 1 - Networking Fundamentals
Chapter 14 Layer 6: The Presentation Layer


Introduction

Layer 6 of the OSI reference model, the presentation layer, provides code
formatting and conversion. Code formatting is used to make sure that
applications have meaningful information to process. If necessary, this layer
can translate between different data formats.

The presentation layer is not only concerned with the format and representation
of data. It is also concerned with the data structure that the programs used.
Thus, Layer 6 arranges for Layer 7 how data will be organized when it is
transferred.

Concept Questions

Demonstrate your knowledge of these concepts by answering the following
questions in the space provided.

Layer 6 standards also guide how graphic images are presented. What standards
for graphic images do Layer 6 employ?






For example, PICT, a picture format used to transfer QuickDraw graphics between
Macintosh and PowerPC programs, can be used. Another presentation format that
can be used is the tagged image file format, or TIFF. Typically, TIFF is used
for high-resolution, bit-mapped images. Another Layer 6 standard that can be
used for graphic images is from the Joint Photographic Experts Group, which is
generally referred to as JPEG. Explain how Layer 6 structures the data for
Layer 7 to transfer.