Provides connectivity and path selection between two host systems that might be
located on geographically separated networks
b. Ensures that the information sent at the application layer of one system is readable
by the application layer of another system
c. De?¬?nes how data is formatted for transmission and how access to the network is
controlled
d. Segments data from the system of the sending host and reassembles the data into
a data stream on the system of the receiving host
e. De?¬?nes the electrical, mechanical, procedural, and functional speci?¬?cations for
activating, maintaining, and deactivating the physical link between end systems
f. Provides network services to the applications of the user, such as e-mail, ?¬?le
transfer, and terminal emulation
g. Establishes, manages, and terminates sessions between two communicating hosts
and also synchronizes dialogue between the presentation layers of the two hosts
and manages their data exchange
17. Arrange the steps of the data encapsulation process in the correct order.
____1. Step 1
____2. Step 2
130 Chapter 1: Building a Simple Network
____3. Step 3
____4. Step 4
____5. Step 5
____6. Step 6
____7. Step 7
____8. Step 8
a. The presentation layer adds the presentation layer header (Layer 6 header) to the
data.
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