Lesson 2

Question 1

Which protocol below is used to format most data packets for transmission over the Internet?

Answer 1

TCP/IP

Question 2

Which descriptive term best describes reception quality when impacted by ‘packet loss’?

Answer 2

poor

Question 3

The unique identifier applicable to a specific network computer or node is the Network _____.

Answer 3

The unique identifier application to a specific network computer or node is the network address.

Question 4

This IPv4 field denotes how long the packet will be active before it is deleted

Answer 4

Of the many fields in the IPv4 packet, the time-to-live field indicates how long the packet will be ‘alive’ before being discarded/deleted

Question 5

Which part of a data packet typically contains an error-checking algorithm?

Answer 5

The part of a data packet which typically contains an error-checking algorithm is both the header and footer.

Question 6

Which of the following problems would the OSI Model solve?

Answer 6

It would allow a Mac and a PC to be used on the same network.

Question 7

Which of the following terms refers to defining the rules for communication between two computers to prevent overload?

Answer 7

Flow Control

Question 8

Which organization created the suggested standard for communications that describes how data is sent and received over a network?

Answer 8

ISO

The OSI (Open Systems Interconnection) model is a suggested standard for communication that was developed by the International Organization for Standardization (ISO). This model describes how data is sent and received over a network, and breaks down data transmission over a series of seven layers.

Question 9

Which layer provides the physical connection between the computer and network?

Answer 9

Physical layer

Question 10

Which of the following is NOT one of the seven layers of the OSI Model?

Answer 10

answer: domain layer

The OSI (Open Systems Interconnection) model is a suggested standard for communication that was developed by the International Organization for Standardization. This model breaks down data transmission over a series of seven layers: physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer.

Question 11

The set of rules or procedures for handling data or information transfer is called _____.

Answer 11

Protocols

Question 12

In the OSI model, the application layer is:

Answer 12

7th layer

Question 13

In the OSI model, the hyperlink uses a(n) _____ to name the pages on the web.

Answer 13

uniform resource locator

Question 14

In the OSI model, what does the application layer do?

Answer 14

This layer actively interacts with the operating system or application when the user decides to transfer files, read messages, or perform network-related activities.

Question 15

In the OSI model, all of the following are protocols of the application layer except:

Answer 15

ICANN

Question 16

Among others, what are the two primary networking features managed by the presentation layer of the OSI model?

Answer 16

1: protocol
2: architecture

Question 17

Which option contains the name of the layer responsible for translating, encrypting and compressing data within the OSI model?

Answer 17

presentation layer

Question 18

The presentation layer of the OSI model is responsible for integrating all data formats into what type of form?

Answer 18

acceptable and compatible

Question 19

The presentation layer of the OSI model translates data into an acceptable format usable by which layer?

Answer 19

The application layer

Question 20

In some situations, the presentation layer of the OSI model may have two sub-layers associated with its operation. Which option below lists both of these sublayers?

Answer 20

1. common application service element (case)
2. specific application service element (sase)

Question 21

The API that allows applications on separate computers to communicate over a LAN is:

Answer 21

NetBIOS

Question 22

Which option below best completes this sentence: Among other communicative tasks, the session layer also terminates:

Answer 22

sessions between software processes

Question 23

What does layer five of the OSI model do?

Answer 23

Establishes, manages and terminates communicative sessions

Question 24

The session layer provides communicative support to which two OSI layers?

Answer 24

presentation and transport

Question 25

Which of the following identifies the protocol or protocols available to the session layer for standardizing communications on a network?

Answer 25

TCP/IP

Question 26

At the ‘receiving’ computer, the transport layer provides input to which OSI layer?

Answer 26

From the ‘receiving’ computer, the transport layer provides input to the OSI’s session layer.

Question 27

The transport layer performs data packet Creation and what other types of services?

Answer 27

Error checking

Question 28

Multiplexing is facilitated by the _____ computer and demultiplexing is facilitated by the _____ computer.

Answer 28

Multiplexing is accomplished on the sending computer, and demultiplexing occurs at the receiving computer.

Question 29

Which protocol provides error recovery and flow control services for the transport layer?

Answer 29

The TCP provides error recovery and flow control services for the transport layer.

Question 30

At the ‘sending’ computer, the transport layer provides input to which OSI layer?

Answer 30

The network layer

Question 31

Which of these is not a design issue for the network layer?

Answer 31

Handling session information is not a design issue for the network layer because that happens on the session layer.

Question 32

Which of these statements is FALSE?

Answer 32

The network layer does all these things except controlling the conversations between different computers. That is done by the session layer.

Question 33

The network layer converts:
* Logical addresses
* MAC addresses into layers
* Physical addresses into logical addresses
* Layers into MAC addresses

Answer 33

Logical addresses into physical addresses

Question 34

IPsec (Internet Protocol Security) works by:

Answer 34

Encrypting and authenticating each packet

Question 35

Which layer is the network layer in the OSI 7 layer model?

Answer 35

The network layer is layer 3 of the OSI 7 layer model.

Question 36

All of the following are functions of the Data Link Layer except

Answer 36

stop all bad files from passing to the physical layer

Question 37

The Data Link layer is the

Answer 37

2nd layer

Question 38

All of the following are protocols of the Data Link Layer except ____.

Answer 38

HTTP

Question 39

Feedback-based flow control ____.

Answer 39

makes sure message is sent back to the sender when it is ready to accept more data

Question 40

When the receiving system lets the sender know the data was received at its destination it is called ____.

Answer 40

acknowledgement

Question 41

Which connector is NOT used in a network cable?

Answer 41

RJ-11

Question 42

In the OSI physical layer, data is transmitted in the form of _____.

Answer 42

Both optical and electromagnetic signals

Question 43

An NIC is used for which of the following?

Answer 43

Connecting a computer to a network

Question 44

In which part of the OSI Model is the physical layer?

Answer 44

Bottom layer

Question 45

Which of the following is true about half-duplex mode?

Answer 45

In half-duplex mode, data is transmitted in both directions but not at the same time.