Topic 3

Question 1

What is flow control?

Answer 1

Manages the rate of data transmission and defines how much information can be sent and the speed at which it can be delivered.

Question 2

What term is used for communication from one-to-many recipients?

Answer 2

Multicast

Question 3

What term is used for communication from one-to-all recipients?

Answer 3

Broadcast

Question 4

What term is used for communication from one-to-one recipient?

Answer 4

Unicast

Question 5

What is the function of the Application layer in the OSI Model?

Answer 5

Contains protocols used for process-to-process communications.

Question 6

What is the function of the Presentation layer in the OSI Model?

Answer 6

Provides for common representation of the data transferred between application layer services.

Question 7

What is the function of the Session layer in the OSI Model?

Answer 7

Provides services to the presentation layer and to manage data exchange.

Question 8

What is the function of the Transport layer in the OSI Model?

Answer 8

Defines services to segment, transfer, and reassemble the data for individual communications.

Question 9

What is the function of the Network layer in the OSI Model?

Answer 9

Provides services to exchange the individual pieces of data over the network.

Question 10

What is the function of the Data Link layer in the OSI Model?

Answer 10

Describes methods for exchanging data frames over a common media.

Question 11

What is the function of the Physical layer in the OSI Model?

Answer 11

Describes the means to activate, maintain, and de-activate physical connections.

Question 12

What is the function of the Application layer in the TCP/IP Model?

Answer 12

Represents data to the user, plus encoding and dialog control.

Question 13

What is the function of the Transport layer in the TCP/IP Model?

Answer 13

Supports communication between various devices across diverse networks.

Question 14

What is the function of the Internet layer in the TCP/IP Model?

Answer 14

Determines the best path through the network.

Question 15

What is the function of the Network Access layer in the TCP/IP Model?

Answer 15

Controls the hardware devices and media that make up the network.

Question 16

Map the OSI layer 7 to the TCP/IP model.

Answer 16

Application

Question 17

Map the OSI layer 6 to the TCP/IP model.

Answer 17

Presentation

Question 18

Map the OSI layer 5 to the TCP/IP model.

Answer 18

Session

Question 19

Map the OSI layer 4 to the TCP/IP model.

Answer 19

Transport

Question 20

Map the OSI layer 3 to the TCP/IP model.

Answer 20

Internet

Question 21

Map the OSI layer 2 to the TCP/IP model.

Answer 21

Network Access

Question 22

Map the OSI layer 1 to the TCP/IP model.

Answer 22

Physical

Question 23

What is data encapsulation?

Answer 23

It’s a top down process of placing one message format where protocols add their information to the data inside another message format and is repeated by each layer.

Question 24

Fill in the correct protocol data unit (PDU) for the Transport layer.

Answer 24

Segment

Question 25

Fill in the correct protocol data unit (PDU) for the Network layer.

Answer 25

Packet

Question 26

Fill in the correct protocol data unit (PDU) for the Data Link layer.

Answer 26

Frame

Question 27

Fill in the correct protocol data unit (PDU) for the Physical layer.

Answer 27

Bits

Question 28

What is the role of network layer addresses?

Answer 28

Responsible for delivering the IP packet from original source to the final destination.

Question 29

What is the role of data link layer addresses?

Answer 29

Responsible for delivering the data link frame from one network interface card (NIC) to another NIC on the same network.

Question 30

What addresses are contained in the IP packet header?

Answer 30

Source IP address, Destination IP address

Question 31

What addresses are contained in the Ethernet Frame Header?

Answer 31

Source MAC address, Destination MAC address

Question 32

What is the purpose of the Default Gateway?

Answer 32

The default gateway is the 'door' to all other remote locations and has an IP address that is part of the local LAN.

Question 33

When is an Ethernet Frame sent to the Default Gateway?

Answer 33

When the final destination is remote, the data link frame will use the MAC address of the default gateway.

Question 34

What is the Default Gateway address for PC1 and FTP Server?

Answer 34

192.168.1.1

Question 35

What is the Default Gateway address for the Web server?

Answer 35

172.16.1.1

Question 36

What is the address of the default gateway (DGW)?

Answer 36

The IP address of the DGW is the IP address of the router interface connected to the local LAN.

Question 37

What happens if a device does not have the default gateway address configured?

Answer 37

All devices on the LAN must be told about this address or their traffic will be confined to the LAN only.