CCNA Practice Quiz OSI model

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

1. Encryption and Compression
2. Error detection and correction
3. Delivery of packet from source to destination.
4. All of the above

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

1. OSI Model
2. ISO Model
3. TCP/IP Model
4. TCP/UDP Model

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

1. Physical layer
2. Network layer
3. Transport layer
4. Application layer

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

1. Segment
2. Packet
3. Frame
4. Bits

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1. Segment
2. Packet
3. Frame
4. Bits

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1. Segment
2. Bits
3. Packet
4. Frame

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1. Port address
2. IP address
3. MAC address
4. None of the above

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8. 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)

1. Logical addressing
2. Segmentation
3. Flow control
4. Port addressing
5. Physical Addressing

Answer

1. TCP, UDP
2. TCP, IP
3. HTTP, HTTPS
4. DNS, DHCP

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1. Bridge
2. Router
3. Ethernet hub
4. Ethernet switch

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

1. SMTP
2. TCP
3. FTP
4. HTTP
5. UDP

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

1. TCP
2. HTTP
3. TFTP
4. IP
5. DHCP

Answer

1. Application layer.
2. Transport layer
3. Network layer
4. Datalink layer

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1. TCP and UDP sub-layer
2. LLC and MAC sub-layer
3. TCP and IP sub-layer
4. None of the above

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

1. The presentation layer translates the data into a common format and performs encryption and compression.
2. The physical layer adds the physical address to the data frames and transmits them through the communication media.
3. The transport layer splits the data into smaller chunks called segments and adds TCP or UDP header before passing it to the lower layer.
4. All of the above statement is correct.

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

1. UDP is considered to be connectionless because it does not establish any dedicated connection between the hosts before sending the segments.
2. UDP is more reliable as compared to the TCP, as it receives ACK, for every segment, it sends to the receiver.
3. FTP uses the UDP protocol to transfer files.
4. It is mostly used in real-time communication
5. It doesn’t guarantee the delivery of a segment to the destination.

Answer

1. Layer 4
2. Layer 5
3. Layer 6
4. Layer 7

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

1. OSI model is considered as a reference model.
2. It is developed by ISO and consists of 7 layers.
3. Internet works on the OSI model.
4. It is considered to be an architectural model for inter-computer communication.
   

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

1. 3,1,7,2
2. 3,2,1,7
3. 3,1,2,7
4. 2,1,7,3

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

1. Layer 7
2. Layer 6
3. Layer 5
4. Layer 4

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