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Free Practice Quiz Question List

2 Network Models and Encapsulation Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 Network Models and Encapsulation, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Every real-world network protocol fits neatly into exactly one OSI layer.

  1. A

    True

  2. B

    False

02
Choose one
1 point

Which function is performed by the OSI Network layer?

  1. A

    It transfers frames across a local link.

  2. B

    It addresses and routes packets between networks.

  3. C

    It provides process-to-process delivery.

  4. D

    It transmits signals and bits over a medium.

03
Fill in the blank
1 point

TCP adds its transport header to application data, producing a .

04
Written response
1 point

What identifiers in a TCP header help deliver data to the appropriate application process? Enter the plural term.

05
Choose one
1 point

In the common four-layer TCP/IP model, which OSI layers approximately correspond to the TCP/IP Application layer?

  1. A

    OSI Layer 1 only

  2. B

    OSI Layers 2–3

  3. C

    OSI Layers 5–7

  4. D

    OSI Layer 4 only

06
Choose all
1 point

Select all the application-layer protocols in this list.

  1. A

    DNS

  2. B

    HTTP

  3. C

    SMTP

  4. D

    SSH

  5. E

    ARP

07
Written response
1 point

What is the name of the process in which receiving layers read and remove their corresponding encapsulation information? Enter the process name.

08
Choose one
1 point

Which protocol maps an IPv4 address to a link-layer address on a local network?

  1. A

    DNS

  2. B

    TCP

  3. C

    ARP

  4. D

    TLS

09
Choose one
1 point

A DNS message is sent over TCP rather than UDP. How does this change DNS's typical layer placement?

  1. A

    DNS is a transport-layer protocol when it uses UDP.

  2. B

    DNS is an application-layer protocol whether it uses UDP or TCP.

  3. C

    DNS is a link-layer protocol when it uses Ethernet.

  4. D

    DNS is an Internet-layer protocol whenever it uses IP.

10
True or false
1 point

True or false: When a packet crosses a router, the link-layer frame can change for the next link while the source and destination IP addresses generally remain the same end-to-end.

  1. A

    True

  2. B

    False

11
Fill in the blank
1 point

TCP provides , whereas IP itself does not guarantee successful delivery.

12
Choose all
1 point

Select all the statements that correctly describe these protocols' typical roles.

  1. A

    IPv4 and IPv6 address and forward packets across networks.

  2. B

    ICMP carries network control and error-reporting messages.

  3. C

    HTTP is a transport-layer protocol.

  4. D

    TCP provides reliable, ordered delivery.

13
Choose one
1 point

How is TLS typically represented in protocol stacks, and which OSI function can its role resemble?

  1. A

    It is always assigned to a separate OSI layer between Transport and Network.

  2. B

    It is usually treated as part of the application stack, with functions that can resemble OSI presentation-layer functions.

  3. C

    It is a link-layer protocol that moves frames over a local link.

  4. D

    It is an Internet-layer protocol that routes IP packets.

14
Open ended
1 point

A host sends an HTTP request using TCP over IPv4 and Ethernet. Explain how the data is encapsulated as it travels down the layers, naming the resulting unit at each stage and the control information added by TCP, IP, and Ethernet.

15
Choose one
1 point

A device must route packets between separate networks using IP addresses. Which OSI layer is responsible for this function?

  1. A

    Data Link

  2. B

    Network

  3. C

    Transport

  4. D

    Session

16
Written response
1 point

In the seven-layer OSI model, which layer number provides process-to-process delivery?

17
Choose one
1 point

A TCP segment is passed down to IP for transmission. After IP adds its header, what is the resulting unit commonly called?

  1. A

    A TCP segment

  2. B

    An Ethernet frame

  3. C

    An IP packet

  4. D

    A bit stream

18
Choose one
1 point

A network engineer is comparing the four-layer TCP/IP model with OSI. Which statement best describes the TCP/IP Application layer?

  1. A

    It approximately corresponds to OSI Layers 5–7.

  2. B

    It corresponds only to OSI Layer 4.

  3. C

    It corresponds only to OSI Layers 1–2.

  4. D

    It has no correspondence to OSI functions.

19
Written response
1 point

On a local IPv4 network, which protocol maps an IPv4 address to a link-layer address?

20
True or false
1 point

True or false: DNS remains an application-layer protocol whether its messages are carried over UDP or TCP.

  1. A

    True

  2. B

    False