CIS 122 MIDTERM The OSI reference model

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23 Οκτ 2013 (πριν από 4 χρόνια και 16 μέρες)

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CIS 122 MIDTERM NAME: ______________________


1.

The OSI reference model is composed of ________ layers.

a.

5 b.

9 c.

7 d.

4

2.

The ________________layer of the OSI reference model is oft
en referred to as the "hardware layer."

a.

Physical b.

Session c.

Network d.

Application

3.

Which of the following is the organization that released and maintains the OSI reference model?

a.

NFS b.

ISO c.

SNA d
.

XNS

4.

The layer of the OSI reference model that provides a user interface is the ________________ layer.

a.

Physical b.

Session c.

Network d.

Application

5.

Which of the following layers of the OSI reference model does data compression?

a
.

Network b.

Physical c.

Data
-
link d.

Presentation

6.

Which of the following indicates the correct order of the layers in the OSI reference model?

a.

Physical, Data
-
link, Transport, Network, Session, Presentation, Application

b.

Data
-
link, Phys
ical, Transport, Network, Session, Presentation, Application

c.

Physical, Data
-
link, Network, Transport, Session, Presentation, Application

d.

Physical, Data
-
link, Network, Session, Transport, Presentation, Application

7.

Which of the following OSI layers
performs name recognition and the functions needed to allow two
applications to communicate over the network?

a.

Network b.

Session c.

Presentation d.

Transport

8.

Which of the following OSI layers provides services such as file transfer soft
ware, e
-
mail software,
and database access?

a.

Session b.

Presentation c.

Network d.

Application

9.

Which of the following OSI layers is responsible for protocol conversion, translation of data, and
encryption of data?

a.

Session
b.

Presentation c.

Network d.

Application

10.

Which of the following OSI layers is responsible for repackaging messages and ensuring that packets
are delivered error free, in sequence, and with no losses or duplications?

a.

Network b.

Sess
ion c.

Presentation d.

Transport