Deck 6: Network Reference Models and Standards

Question 1

Which layer is responsible for the encoding of signals?

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

Answer 1

B

Question 2

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

Answer 2

True

Question 3

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

Answer 3

A

Question 4

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

Question 5

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

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

Question 6

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 7

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 8

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 9

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 10

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 11

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 12

The maximum transmission unit for Ethernet is 1518 bytes.

Question 13

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 14

Which layer is responsible for establishing a connection between the source and destination?

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

Question 15

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

Question 16

At what layer do NICs operate?

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

Question 17

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

Question 18

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

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

Question 19

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 20

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

Question 21

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 22

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

Question 23

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

Question 24

What are the benefits to using a layered approach?

Question 25

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

Question 26

The process of stripping the header and trailer from a PDU is called ____________.

Question 27

At which layer would you find errors that were caused by EMI?

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

Question 28

The ____________ layer of the TCP/IP model combines the top three layers of the OSI model into one layer.

Question 29

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

Question 30

MATCHING :

Question 31

The ____________ layer is the bottom layer, whose job it is to convert bits into signals and vice versa.

Question 32

Name the PDU at each layer of the OSI model.

Question 33

How can you find out what your MAC address is? (Choose all that apply.)

A) Right-click on the Local Area Connection and choose status.
B) Open a command prompt and type the command arp -d.
C) Open a command prompt and type the command getmac.
D) Open a command prompt and type the command ipconfig /all.

Question 34

How does window size provide flow control?

Question 35

The ____________ reference model is a general framework for networking systems that uses a layered approach to reduce its complexity.

Question 36

What is encoding, and where does it take place?

Question 37

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

Question 38

The PDU at the Data Link layer is called a ____________.

Question 39

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