Question 1

In the TCP/IP model, which layer defines the interface between software running on the computer and the network itself?
A) Transport
B) Internet
C) Application
D) Data link

Accepted Answer

A) The transport layer is incorrect because it deals with data delivery and flow control.
B) The Internet layer is incorrect because it deals with addressing and routing.
C) Application is correct because the application layer protocols provide services to the application software. The application layer does not define the application itself but does define how the application can access the network.
D) The data link layer is incorrect because it deals with how to access media.

Question 2

Which layer of the TCP/IP model defines the rules for data packet recovery?
A) Transport
B) Internet
C) Application
D) Data link

Accepted Answer

A) Transport is correct because the transport layer protocols deal with error recovery of data. The transport layer also handles the mechanism to guarantee delivery across the network. The other layers do not.

Question 3

What are the two main services provided by the network layer of the TCP/IP model?
A) Compression
B) Addressing
C) Routing
D) Reliability
E) Encryption

Accepted Answer

B) Addressing and routing are correct answers because addressing deals with placing the correct IP address in the packet, and routing deals with getting the packet to the correct destination.
C) Addressing and routing are correct answers because addressing deals with placing the correct IP address in the packet, and routing deals with getting the packet to the correct destination.

Question 4

The process of forwarding an IP packet from host to host is known as ________.
A) Delivery
B) Switching
C) Routing
D) Sending

Accepted Answer

C) Routing is the correct answer because routing deals with getting the packet to the correct destination. Switching deals with getting frames to their correct destinations. Routing works much like the postal service to deliver messages to the correct destination.

Question 5

What name is given to the process of enclosing data with headers and trailers as the data is moved down the TCP/IP model?
A) Condensing
B) Inclosing
C) Encryption
D) Encapsulation

Accepted Answer

D) Encapsulation is the correct answer because as the data moves down the TCP/IP model and each layer attaches its control data, this process is known as encapsulation.

Question 6

Which layer of the OSI model defines how to start, control, and end conversations by grouping messages in a workflow?
A) Application layer
B) Presentation layer
C) Session layer
D) Transport layer
E) Network layer
F) Data link layer
G) Physical layer

Accepted Answer

C) The session layer defines the start, control, and end of conversations (called session) with each computer.

Question 7

Which layer of the OSI model defines functions related to data delivery, error recovery, and flow control?
A) Application layer
B) Presentation layer
C) Session layer
D) Transport layer
E) Network layer
F) Data link layer
G) Physical layer

Accepted Answer

D) The transport layer focuses on issues related to data delivery to another computer (for example, error recovery and flow control).

Question 8

Which layer of the OSI model provides an interface between the network and the software running on a host machine?
A) Application layer
B) Presentation layer
C) Session layer
D) Transport layer
E) Network layer
F) Data link layer
G) Physical layer

Accepted Answer

A) The application layer focuses on issues related to communication between the software and the network.

Question 9

In IT, what term refers to a small network that is used for business purposes, typically in the home of a business or employee?
A) Organizational network
B) Enterprise network
C) IT network
D) SOHO network
E) Cloud network

Accepted Answer

D) When you start to work in a new industry, it is good to be familiar with some of the most popularly used terms. When referring to a small network that is used for business purposes and is typically located in the home of the business (home office) or employee, the term SOHO (Small Office, Home Office) is typically used.

Question 10

At which of the OSI model layers are rules defined that determine how a device can send data over a particular medium?
A) Presentation
B) Application
C) Transport
D) Network
E) Data link

Accepted Answer

E) Of the seven OSI network model layers, the data link layer determines how a device can send data over a particular medium, such as Ethernet data link protocols.

Question 11

Which of the OSI model layers has the main purpose of defining and negotiating data formatting?
A) Presentation
B) Application
C) Transport
D) Network
E) Data link

Accepted Answer

A) The OSI presentation layer (Layer 6) is responsible for defining and negotiating the data format between communicating hosts. Some common formats include ASCII and EBCDIC. It is also at this layer that some data conversion can occur (for example, from ASCII to EBCDIC).

Question 12

Which of the following terms best describes the process of adding headers and possibly trailers to information for transit?
A) Encapsulation
B) Packets
C) Frames
D) Data Linking

Accepted Answer

A) Encapsulation is the process of putting headers (and sometimes trailers) around data for transmission. Packets and frames are defined by the data included in them. Data link is a layer in the OSI model.

Question 13

Which of the following layers in the OSI model corresponds to the Internet layer in the original TCP/IP model?
A) Application
B) Transport
C) Network
D) Physical

Accepted Answer

C) The Network layer in OSI is equivalent to the Internet layer in the original TCP/IP and has been updated to be the Network layer in the new TCP/IP model.

Question 14

In comparing the OSI model to the TCP/IP model, which of the following layers of the OSI model are equivalent to the Application layer in the TCP/IP model?
A) Application
B) Presentation
C) Session
D) Transport
E) Network
F) Data link
G) Physical

Accepted Answer

A) The application, presentation, and session layers in the OSI model are abstracted as the application layer in the TCP/IP model. These are the highest layers (closest to the user) in both models.
B) The application, presentation, and session layers in the OSI model are abstracted as the application layer in the TCP/IP model. These are the highest layers (closest to the user) in both models.
C) The application, presentation, and session layers in the OSI model are abstracted as the application layer in the TCP/IP model. These are the highest layers (closest to the user) in both models.

Question 15

Which layer of the OSI model includes the TCP and UDP protocols?
A) Application
B) Presentation
C) Session
D) Transport
E) Network
F) Data link
G) Physical

Accepted Answer

D) TCP and UDP are transport protocols, introduced at the transport layer of OSI (and TCP/IP).

Question 16

Which OSI encapsulation term can be used instead of the term IP packet?
A) Layer 1 PDU
B) Layer 2 PDU
C) Layer 3 PDU
D) Layer 5 PDU
E) Layer 7 PDU

Accepted Answer

C) Rather than using terms such as frame, packet, and segment, OSI uses the generic term of PDU (protocol data unit). An IP packet is a Layer 3 PDU because IP operates at Layer 3 of the OSI model.

Question 17

Which protocol is an example of a TCP/IP application layer protocol?
A) HTTP
B) UDP
C) IP
D) Ethernet

Accepted Answer

A) HTTP is an example of a protocol that operates at the application layer of the TCP/IP model.

Quiz 1: Introduction to TCP/IP Networking

In the TCP/IP model, which layer defines the interface between software running on the computer and the network itself?

Which layer of the TCP/IP model defines the rules for data packet recovery?

What are the two main services provided by the network layer of the TCP/IP model?

The process of forwarding an IP packet from host to host is known as ________.

What name is given to the process of enclosing data with headers and trailers as the data is moved down the TCP/IP model?

Which layer of the OSI model defines how to start, control, and end conversations by grouping messages in a workflow?

Which layer of the OSI model defines functions related to data delivery, error recovery, and flow control?

Which layer of the OSI model provides an interface between the network and the software running on a host machine?

In IT, what term refers to a small network that is used for business purposes, typically in the home of a business or employee?

At which of the OSI model layers are rules defined that determine how a device can send data over a particular medium?

Which of the OSI model layers has the main purpose of defining and negotiating data formatting?

Which of the following terms best describes the process of adding headers and possibly trailers to information for transit?

Which of the following layers in the OSI model corresponds to the Internet layer in the original TCP/IP model?

In comparing the OSI model to the TCP/IP model, which of the following layers of the OSI model are equivalent to the Application layer in the TCP/IP model?

Which layer of the OSI model includes the TCP and UDP protocols?

Which OSI encapsulation term can be used instead of the term IP packet?

Which protocol is an example of a TCP/IP application layer protocol?