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Free Practice Quiz Question List

Protocols and Layered Network Architecture Online Quiz Questions

Use this free practice quiz with 20 questions to review Protocols and Layered Network Architecture, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

What does a network layer's service describe?

  1. A

    A protocol between peer layers on different devices

  2. B

    A service offered by one layer to the layer above it

  3. C

    A physical medium used by the lower layer

  4. D

    A header added during encapsulation

02
Choose one
1 point

A host receives data and must deliver it to the correct application process using a port number. Which layer performs this function?

  1. A

    Transport layer

  2. B

    Network layer

  3. C

    Link layer

  4. D

    Physical layer

03
Choose one
1 point

When forwarding a packet, which field does a router primarily examine to select the next hop?

  1. A

    The destination Ethernet payload

  2. B

    The destination application port

  3. C

    The destination IP address

  4. D

    The physical signal frequency

04
Choose all
1 point

Select all properties that characterize TCP in the Internet transport layer.

  1. A

    It supports reliable, ordered delivery.

  2. B

    It preserves message boundaries but provides no delivery guarantee.

  3. C

    It uses acknowledgments and retransmission mechanisms.

  4. D

    It is selected primarily because it never adds protocol overhead.

05
Choose all
1 point

Select all statements that correctly describe the link layer's role.

  1. A

    It can use local addresses such as Ethernet MAC addresses.

  2. B

    Its frame normally carries an IP packet as its payload.

  3. C

    Its address necessarily remains unchanged across every router hop.

  4. D

    It guarantees that an IP packet reaches its final application.

06
True or false
1 point

True or false: During encapsulation, each lower layer can add control information around the payload received from the layer above.

  1. A

    True

  2. B

    False

07
True or false
1 point

True or false: The physical layer interprets IP addresses so that it can choose the next router hop.

  1. A

    True

  2. B

    False

08
Written response
1 point

Which transport protocol preserves message boundaries but does not itself guarantee delivery or ordering?

09
Written response
1 point

How many conceptual layers are included in the commonly used five-layer model of the Internet protocol suite?

10
Fill in the blank
1 point

A defines communication between peer entities at the same layer on different devices, while a describes what one layer offers to the layer above it.

11
Fill in the blank
1 point

On a local link, a link-layer normally carries an IP as its payload.

12
Open ended
1 point

Explain what happens to the link-layer frame and the IP packet when a packet passes through a router. Why can the link-layer addresses change while the end-to-end IP addresses generally remain associated with the original endpoints?

13
Choose one
1 point

Which statement best explains why the five-layer Internet model does not exactly match the seven-layer OSI reference model?

  1. A

    The Internet model has no transport layer.

  2. B

    The Internet application layer combines functions separated by OSI.

  3. C

    The OSI model has no physical layer.

  4. D

    The Internet model requires exactly the same seven layers as OSI.

14
Choose one
1 point

What does the IPv6 Next Header field identify?

  1. A

    The physical transmission medium

  2. B

    The final Ethernet destination on every hop

  3. C

    The application's user-visible resource

  4. D

    The header or transport protocol immediately following IPv6

15
Choose one
1 point

Which Internet layer is responsible for transmitting encoded bits as signals through a cable, fiber, or radio medium?

  1. A

    Application layer

  2. B

    Network layer

  3. C

    Physical layer

  4. D

    Transport layer

16
Choose one
1 point

A web browser sends data through a socket provided by the operating system. In the terminology of layered networking, what does the socket represent?

  1. A

    A protocol between peer routers

  2. B

    A local interface through which an application requests network service

  3. C

    A physical transmission medium

  4. D

    A message format used only by Ethernet

17
Choose one
1 point

A server host is running several networked applications. Which layer uses port numbers to deliver incoming data to the correct application process?

  1. A

    Application layer

  2. B

    Transport layer

  3. C

    Network layer

  4. D

    Link layer

18
True or false
1 point

IP by itself guarantees that packets will arrive at the destination in their original order.

  1. A

    True

  2. B

    False

19
Written response
1 point

Which Internet transport protocol provides a connection-oriented byte stream with reliable, ordered delivery? Enter the protocol name only.

20
Written response
1 point

What type of local link-layer address is used by Ethernet to identify devices on a link? Enter the address term.