Deck 7: Network Reference Models and Standards

Question 1

You are working at the help desk and you get a message that a user cannot access the Internet.You open a command prompt,ping the workstation's IP address,and get a response.You ask the user to try the Internet again.He does so with the same result- no connection.Which type of device is most likely to be the problem?

A) Physical layer device
B) Data Link layer device
C) Network layer device
D) Presentation layer device

Answer 1

C

Question 2

The Physical layer has been divided into two sublayers,called the LLC sublayer and the MAC sublayer.

Answer 2

False

Question 3

The maximum transmission unit for Ethernet is 1518 bytes.

Answer 3

True

Question 4

Which is the IEEE standard that sets the standards for wireless networking?

A) 802.16
B) 802.3
C) 802.15
D) 802.11

Question 5

What information would you find in the header of a Transport layer PDU?

A) destination IP address
B) cyclic redundancy check
C) source MAC address
D) window size

Question 6

At what layer do NICs operate?

A) Transport
B) Data Link
C) Physical
D) Network

Question 7

One of the problems that can occur in the Network layer is the incorrect configuration of a hosts IP address.

Question 8

What does the Transport layer use to make sure that a message is reassembled correctly on the receiving device?

A) source port number
B) window Size
C) destination port number
D) sequence number

Question 9

Which layer of the OSI model is responsible for encryption and decryption?

A) Application
B) Presentation
C) Session
D) Transport

Question 10

What layer is responsible for making sure that the data that it sends and receives is in a format that the receiving and sending computers can understand?

A) 7
B) 6
C) 5
D) 4

Question 11

What is the IEEE standard that governs all forms of Ethernet media and interfaces?

A) 802.11
B) 802.3
C) 802.15
D) 802.2

Question 12

The Network layer communicates with the Data Link layer and the Session layer.

Question 13

The Transport layer is the same in both the OSI model and the TCP/IP model.

Question 14

At each layer of the OSI model,data is appended to the original message and then sent on to the next lower layer.What is this process called?

A) encapsulation
B) deencapsulation
C) packetization
D) checkpointing

Question 15

One job that a router performs is that of gatekeeper,which means that it can be configured to only allow certain packets access into the network based on a list of rules.What is that process called?

A) media control
B) packet forwarding
C) access control
D) signal bounce

Question 16

What is a PDU?

A) It is an Application layer protocol that handles delivery of messages.
B) It is a unit of measurement for the maximum amount of data that can be transferred.
C) It is the name given to the unit of information used by each layer.
D) It is a Network layer protocol that handles path determination

Question 17

Which layer has been subdivided into the Logical Link Control sublayer and the Media Access Control sublayer?

A) Physical
B) Data Link
C) Network
D) Transport

Question 18

Which of the following is the correct order of the layers of the OSI model from layer 1 to layer 7?

A) Application,Presentation,Session,Transport,Network,Data Link,Physical
B) Application,Session,Transport,Presentation,Network,Data Link,Physical
C) Physical,Data Link,Network,Transport,Session,Presentation,Application
D) Physical,Session,Network,Data Link,Transport,Presentation,Application

Question 19

Which layer is responsible for determining the best path a packet should travel across an internetwork?

A) Network
B) Transport
C) Session
D) Data Link

Question 20

Which layer is responsible for establishing communication setup between the source and destination computers?

A) Application
B) Session
C) Transport
D) Presentation

Question 21

What is encoding,and where does it take place?

Question 22

Name the PDU at each layer of the OSI model.

Question 23

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
This is the general framework for how networking systems should operate.

Question 24

List the layers of the OSI model from the top down,along with their counterparts in the TCP/IP model.

Question 25

What are the benefits to using a layered approach?

Question 26

The Transport layer PDU includes a field for window size.What is the "window size"?

Question 27

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
This sublayer is responsible for some error recovery.

Question 28

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
Switches operate at this layer.

Question 29

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
Hubs operate at this layer.

Question 30

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
Sublayer manages access to the physical medium.

Question 31

Which layer is responsible for the encoding of signals?

A) 3
B) 1
C) 5
D) 7

Question 32

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
Computers operate at this layer.

Question 33

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
This layer handles data formatting and translation.

Question 34

The Transport layer segments data into smaller chunks,the size of which is determined by which of the following?

A) MTU
B) LLC
C) PDU
D) TCP

Question 35

What does the Data Link layer do with a frame after it receives it?

Question 36

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
This handles communication setup and teardown.

Question 37

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
Routers operate at this layer.

Question 38

How does window size provide flow control?

Question 39

What does "802" refer to in the IEEE 802 standard?

Question 40

Match each item with a statement below.a.Application layer
b.Presentation layer
c.Session layer
d.Transport layer
e.Network layer
f.Data Link layer
g.Physical layer
h.Media Access Control sublayer
i.Logical Link Control sublayer
j.OSI reference model
This uses port numbers as source and destination identifiers

Question 41

What are the sublayers of the Data Link layer,and what do they do?

Question 42

In regards to the OSI Reference Model,what is peer communication?