CCNA Practice Quiz - OSI Model

Which of the following are the functions of the network layer of the OSI model?

Encryption and Compression

Error detection and correction

Delivery of packet from source to destination.

All of the above

Delivery of packet from source to destination.

Which of the network models are always discussed to understand the functionality of the network? ( Choose any two)

OSI Model

ISO Model

TCP/IP Model

TCP/UDP Model

OSI Model/TCP/IP Model

___________ layer of the OSI model is responsible for the exchange of data frames between the hosts through communication media.

Physical layer

Network layer

Transport layer

Application layer

Physical layer

The PDU formed at the network layer of the OSI model is called ______.

Segment

Packet

Frame

Bits

Packet

The PDU formed at the Transport layer of the OSI model is called _______.

Segment

Packet

Frame

Bits

Segment

The PDU formed at the data link layer of the OSI model is called _______.

Segment

Bits

Packet

Frame

Frame

_______ is also termed as a logical address.

Port address

IP address

MAC address

None of the above

IP address

The transport layer of the OSI model is responsible for the host to host communication. In addition to that, It is also responsible for _____, ________ and _________. ( Choose any three)

Logical addressing

Segmentation

Flow control

Port addressing

Physical Addressing

Segmentation; Flow control; Port addressing

________ and ______ is the important protocols of transport layer of OSI model.

TCP, UDP

TCP, IP

HTTP, HTTPS

DNS, DHCP

TCP, UDP

_________ is a network device that works at layer 3 of the OSI model.

Bridge

Router

Ethernet hub

Ethernet switch

Router

Which of the following is the transport layer protocol of the TCP/IP protocol suite? (Choose any two)

SMTP

TCP

FTP

HTTP

UDP

TCP; UDP

Which of the following are the Application layer protocols of the TCP/IP protocol suite? (Choose any three)

TCP

HTTP

TFTP

IP

DHCP

HTTP; TFTPDHCP

Which layer of the OSI model is included in the Internet layer of the TCP/IP model?

Application layer.

Transport layer

Network layer

Datalink layer

Network layer

Which of the following are the sub-layers of the data link layer of the OSI model?

TCP and UDP sub-layer

LLC and MAC sub-layer

TCP and IP sub-layer

None of the above

LLC and MAC sub-layer

Which of the following statements correctly describe the process of data encapsulation in the OSI model? (Choose any two)

A. The presentation layer translates the data into a common format and performs encryption and compression.

B. The physical layer adds the physical address to the data frames and transmits them through the communication media.

C. The transport layer splits the data into smaller chunks called segments and adds TCP or UDP header before passing it to the lower layer.

D. All of the above statement is correct.

A AND C

The following statement describes the characteristics of the UDP protocol of the OSI model (Choose any three)

A. UDP is considered to be connectionless because it does not establish any dedicated connection between the hosts before sending the segments.

B. UDP is more reliable as compared to the TCP, as it receives ACK, for every segment, it sends to the receiver.

C. FTP uses the UDP protocol to transfer files.

D. It is mostly used in real-time communication

E. It doesn’t guarantee the delivery of a segment to the destination.

A; D; E

Which of the following layers of the OSI model is responsible for user interaction?

Layer 4

Layer 5

Layer 6

Layer 7

Layer 7

Which of the following is not correct for the OSI model?

OSI model is considered as a reference model.

It is developed by ISO and consists of 7 layers.

Internet works on the OSI model.

It is considered to be an architectural model for inter-computer communication.

Internet works on the OSI model.

Router operates at ______ ; ethernet hub operates at _________; bridge operates at _______; web browser operates at _______ layers of OSI model respectively.

3,1,7,2

3,2,1,7

3,1,2,7

2,1,7,3

3,1,2,7

Which of the following layers of the OSI model have the characteristics: acknowledgement, sequencing, and flow control.

Layer 7

Layer 6

Layer 5

Layer 4

Layer 4