CompTIA Network+ N10-008 Exam OSI Model Quiz

In the OSI model, the physical layer PDU is known as:

Bit

Layer 2 of the OSI model is also referred to as:

Data Link Layer

In the OSI model, the layer 4 UDP PDU is called:

Datagram

Which of the following answers refer to examples of network layer header data? (Select 2 answers)

Destination IP address Source IP address

In the context of the OSI model, the term "Data encapsulation" is used to describe a process where each layer of the OSI model adds its own control information to the original data that is being passed across the layers from the physical layer up to the application layer.

False

Transmission Control Protocol (TCP) is an example of a connectionless protocol. Because TCP does not support three-way handshake while establishing a network connection, it is referred to as unreliable or best-effort protocol. Example applications of TCP include transmission of video and audio streaming data.

False

User Datagram Protocol (UDP) is a connection-oriented protocol using a three-way handshake which is a set of initial steps required for establishing network connection. UDP supports retransmission of lost packets, flow control (managing the amount of data that is being sent), and sequencing (rearranging packets that arrived out of order). Example applications of UDP include transmission of text and image data.

False

In the OSI model, the layer 2 PDU is called:

Frame

Which of the following protocols reside(s) at the application layer of the OSI model? (Select all that apply)

HTTP FTP SMTP

What is the name of a network layer protocol that specifies the format of packets and addressing scheme in network communications?

IP

Physical layer of the OSI model is also known as:

Layer 1

Which of the following terms refers to the OSI network layer?

Layer 3

Which of the following answers does not refer to the OSI TCP segment header?

Layer 3 header

Which of the following answers does not refer to the OSI UDP datagram header?

Layer 3 header

The term "Presentation layer" refers to:

Layer 6 of the OSI model

The application layer of the OSI model is also known as:

Layer 7

A limit on the maximum amount of data that can be transmitted over a network without fragmentation is referred to as:

MTU

Which of the following reside at the physical layer of the OSI model? (Select 3 answers)

Network cabling Repeater Hub

What are the characteristic components of the OSI data link layer? (Select 3 answers)

Network switch MAC address Ethernet frame

In the OSI model, the layer 3 PDU is known as:

Packet

Which of the following answers refer to the OSI network layer components? (Select 3 answers)

Packet IP address Router

Data format translation, data compression, and data encryption/decryption take place at the:

Presentation layer of the OSI model

Which of the following TCP flags are used for establishing a network connection via TCP three-way handshake? (Select 2 answers)

SYN ACK

In the OSI model, the layer 4 TCP PDU is known as:

Segment

Layer 5 of the OSI model is also referred to as:

Session layer

Which OSI layer assumes the responsibility for opening, closing, and maintaining connections between applications?

Session layer

Authentication and authorization take place at the:

Session layer of the OSI model

Which of the following answers refer to the OSI layer 2 header data? (Select 2 answers)

Source MAC address Destination MAC address

Which of the answers listed below refers to a data link layer device designed to forward frames between network segments?

Switch

Layer 4 of the OSI model is also known as:

Transport layer

In the OSI model, the payload data (a.k.a. user data) is the actual data that is being nested between header and tail control information.

True

Which of the protocols listed below reside at the OSI transport layer? (Select 2 answers)

UDP/TCP