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OSI & TCP/IP Models

09/06/2026 By Sanchit Agrawal 1 min read 👁 93 views Updated 09/06/2026

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OSI & TCP/IP Models

Practice Quiz Series

OSI & TCP/IP Models

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Question 1 of 25

OSI & TCP/IP ModelsEasy1 mark(s)

1. Which devices or components primarily operate at OSI Layer 1?

Select all correct answers.

HubNetwork cableRepeaterRouterLayer 2 switch

OSI & TCP/IP ModelsMedium1 mark(s)

2. Which functions are associated with the OSI Session layer?

Select all correct answers.

Terminating sessionsTransmitting electrical signalsSelecting IP routesMaintaining sessionsEstablishing communication sessions

OSI & TCP/IP ModelsEasy1 mark(s)

3. Which OSI layers are considered the upper layers in the seven-layer model?

Select all correct answers.

Data LinkPresentationNetworkApplicationSession

OSI & TCP/IP ModelsEasy1 mark(s)

4. Which tasks are performed by the OSI Network layer?

Select all correct answers.

Logical IP addressingPacket routingMAC learning on a switchApplication data formattingPath selection

OSI & TCP/IP ModelsEasy1 mark(s)

5. Which protocols are associated with the TCP/IP Internet layer?

Select all correct answers.

ICMPIPv4HTTPIPv6Ethernet

OSI & TCP/IP ModelsHard1 mark(s)

6. As a routed IP packet crosses a normal router, which statements are correct?

Select all correct answers.

The router converts the packet into TCP regardless of its protocolThe router makes a forwarding decision using Layer 3 informationThe original Ethernet source and destination MAC addresses remain unchanged end to endA new Layer 2 frame is built for the outgoing linkThe incoming Layer 2 frame is removed

OSI & TCP/IP ModelsMedium1 mark(s)

7. Which statements about encapsulation are correct?

Select all correct answers.

Encapsulation removes all headers before transmissionOnly the Application layer adds information to dataTransport information is added as data moves down the stackNetwork-layer addressing is added before Layer 2 framingA Data Link header can contain MAC addressing information

OSI & TCP/IP ModelsMedium1 mark(s)

8. Which technologies or functions belong to the TCP/IP Network Access layer?

Select all correct answers.

DNS name resolutionWi-Fi link-layer operationEthernetPhysical media accessTCP sequencing

OSI & TCP/IP ModelsEasy1 mark(s)

9. Which statements correctly describe TCP?

Select all correct answers.

It uses MAC addresses to identify applicationsIt provides sequencing and acknowledgmentsIt is connection-orientedIt always operates without a handshakeIt can retransmit lost data

OSI & TCP/IP ModelsHard1 mark(s)

10. When a host sends data to another IP network, which actions can occur during encapsulation?

Select all correct answers.

The destination IP address is always replaced by the gateway's IP addressThe application destination port is replaced by a MAC addressThe host builds a local Layer 2 frame for the next hopThe host creates an IP packet with source and destination IP addressesThe frame can use the default gateway's MAC address as destination

OSI & TCP/IP ModelsMedium1 mark(s)

11. Which functions are associated with the OSI Presentation layer?

Select all correct answers.

Compression and decompressionMAC address learningEncryption and decryptionData format translationIP packet forwarding

OSI & TCP/IP ModelsMedium1 mark(s)

12. Which OSI layers are combined into the TCP/IP Application layer in the common four-layer TCP/IP model?

Select all correct answers.

ApplicationPresentationTransportNetworkSession

OSI & TCP/IP ModelsMedium1 mark(s)

13. Which protocols or technologies are commonly associated with OSI Layer 2?

Select all correct answers.

TCPEthernetIEEE 802.1QOSPFARP

OSI & TCP/IP ModelsMedium1 mark(s)

14. Which statements correctly distinguish Layer 2 and Layer 3 addressing?

Select all correct answers.

Routers normally forward traffic based on Layer 3 informationTCP ports replace IP addresses when traffic crosses a routerIP addresses provide logical addressing across routed networksSwitches normally route Internet packets using destination TCP portsMAC addresses are used for local link delivery

OSI & TCP/IP ModelsEasy1 mark(s)

15. Which examples are generally associated with the OSI Application layer?

Select all correct answers.

SMTPDNSIPv4HTTPEthernet

OSI & TCP/IP ModelsMedium1 mark(s)

16. Which statements correctly describe decapsulation?

Select all correct answers.

It occurs as received data moves up the protocol stackIt allows upper layers to receive the appropriate payloadIt occurs only on routersLayer-specific headers are processed and removedIt adds a new Ethernet header at every upper layer

OSI & TCP/IP ModelsHard1 mark(s)

17. Which observations can help identify the layer involved in a network problem?

Select all correct answers.

Incorrect VLAN assignment can indicate a Data Link-layer issueNo link light can indicate a Physical-layer issueA blocked TCP port can involve Transport-layer filteringA missing route can indicate a Network-layer issueA damaged cable is primarily an Application-layer issue

OSI & TCP/IP ModelsEasy1 mark(s)

18. Which protocols belong to the TCP/IP Transport layer?

Select all correct answers.

UDPEthernetICMPIPv4TCP

OSI & TCP/IP ModelsEasy1 mark(s)

19. Which functions are provided by the OSI Transport layer?

Select all correct answers.

End-to-end transportPhysical signal transmissionMAC address learningSegmentation and reassemblyPort-based application identification

OSI & TCP/IP ModelsEasy1 mark(s)

20. Which items are associated with OSI Layer 3?

Select all correct answers.

RouterTCPEthernet frameIPv4IPv6

OSI & TCP/IP ModelsMedium1 mark(s)

21. Which mappings between OSI and TCP/IP models are correct?

Select all correct answers.

OSI Data Link and Physical map broadly to TCP/IP Network AccessOSI Network maps broadly to TCP/IP InternetOSI Physical maps to TCP/IP TransportOSI Transport maps broadly to TCP/IP TransportOSI Application maps to TCP/IP Internet

OSI & TCP/IP ModelsEasy1 mark(s)

22. Which functions belong to the OSI Data Link layer?

Select all correct answers.

Routing using IP addressesMAC addressingError detection using frame checksFrame handlingTCP port addressing

OSI & TCP/IP ModelsEasy1 mark(s)

23. Which PDU associations are commonly used with the OSI model?

Select all correct answers.

Network layer — packetPhysical layer — IP packetData Link layer — frameApplication layer — Ethernet frameTransport layer — segment for TCP

OSI & TCP/IP ModelsEasy1 mark(s)

24. Which statements correctly describe UDP?

Select all correct answers.

It has lower protocol overhead than TCPIt guarantees ordered deliveryIt requires a three-way handshakeIt does not provide TCP-style retransmissionIt is connectionless

OSI & TCP/IP ModelsEasy1 mark(s)

25. Which functions are associated with the OSI Physical layer?

Select all correct answers.

Routing packets between networksDefining electrical or optical signalingManaging TCP sessionsSpecifying connectors and cablingTransmitting raw bits over the medium

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OSI & TCP/IP Models

1. Which devices or components primarily operate at OSI Layer 1?

2. Which functions are associated with the OSI Session layer?

3. Which OSI layers are considered the upper layers in the seven-layer model?

4. Which tasks are performed by the OSI Network layer?

5. Which protocols are associated with the TCP/IP Internet layer?

6. As a routed IP packet crosses a normal router, which statements are correct?

7. Which statements about encapsulation are correct?

8. Which technologies or functions belong to the TCP/IP Network Access layer?

9. Which statements correctly describe TCP?

10. When a host sends data to another IP network, which actions can occur during encapsulation?

11. Which functions are associated with the OSI Presentation layer?

12. Which OSI layers are combined into the TCP/IP Application layer in the common four-layer TCP/IP model?

13. Which protocols or technologies are commonly associated with OSI Layer 2?

14. Which statements correctly distinguish Layer 2 and Layer 3 addressing?

15. Which examples are generally associated with the OSI Application layer?

16. Which statements correctly describe decapsulation?

17. Which observations can help identify the layer involved in a network problem?

18. Which protocols belong to the TCP/IP Transport layer?

19. Which functions are provided by the OSI Transport layer?

20. Which items are associated with OSI Layer 3?

21. Which mappings between OSI and TCP/IP models are correct?

22. Which functions belong to the OSI Data Link layer?

23. Which PDU associations are commonly used with the OSI model?

24. Which statements correctly describe UDP?

25. Which functions are associated with the OSI Physical layer?

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