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Free Practice Quiz Question List

4 Ethernet and Local Area Networks Online Quiz Questions

Use this free practice quiz with 20 questions to review 4 Ethernet and Local Area Networks, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

Which Ethernet frame field provides an error-checking value that allows a receiver to detect frame corruption?

  1. A

    Destination MAC address

  2. B

    Payload

  3. C

    Frame Check Sequence (FCS)

  4. D

    Type/Length

02
Choose one
1 point

A receiver finds that an Ethernet frame's FCS indicates corruption. What can the receiver conclude from the FCS?

  1. A

    It retransmits a corrupted frame.

  2. B

    It identifies the intended recipient.

  3. C

    It allows the receiver to detect frame corruption.

  4. D

    It tells the switch which port learned the source address.

03
Choose one
1 point

A computer sends an IP packet to a destination outside its local IP network. Which MAC address should it place in the Ethernet frame's destination field?

  1. A

    The remote device's MAC address

  2. B

    The next-hop router's MAC address

  3. C

    The local switch's MAC address

  4. D

    The broadcast MAC address in every case

04
Choose all
1 point

A switch receives a frame on one of its ports. Which actions describe how it learns MAC addresses? Select all correct answers.

  1. A

    It records the incoming frame's source MAC address.

  2. B

    It learns the source address from the destination field.

  3. C

    It associates the learned source address with the port where the frame arrived.

  4. D

    It records only the destination address and ignores the incoming port.

05
Choose all
1 point

Which statements correctly distinguish full-duplex and traditional half-duplex Ethernet links? Select all correct answers.

  1. A

    Full duplex allows both ends to send and receive at the same time.

  2. B

    Full duplex requires devices to take turns transmitting.

  3. C

    Traditional half-duplex Ethernet uses CSMA/CD to detect collisions and retry transmissions.

  4. D

    Half duplex guarantees that collisions cannot occur.

06
True or false
1 point

Routers use destination MAC addresses to forward traffic between IP networks.

  1. A

    True

  2. B

    False

07
True or false
1 point

An Ethernet frame's FCS repairs any corruption found in the frame.

  1. A

    True

  2. B

    False

08
Written response
1 point

An Ethernet frame is addressed to exactly one receiving interface. What type of destination is this?

09
Written response
1 point

A technician records the signaling rate of an Ethernet link. What unit is used to express link speed?

10
Fill in the blank
1 point

Ethernet is a family of wired local-area networking technologies standardized as .

11
Fill in the blank
1 point

In a common Ethernet frame, the payload carries the and its data.

12
Choose one
1 point

What do compatible Ethernet ports commonly agree on through auto-negotiation?

  1. A

    Which IP address the devices will use

  2. B

    Supported speed and duplex settings

  3. C

    The destination MAC address for every frame

  4. D

    Whether the LAN uses broadcast frames

13
Choose one
1 point

A switch receives a unicast frame whose destination MAC address is not in its table. What does it do with the frame?

  1. A

    It sends the frame only back through the incoming port.

  2. B

    It discards the frame because the destination is unknown.

  3. C

    It floods the frame out other ports in the same VLAN.

  4. D

    It sends the frame to every VLAN on the switch.

14
Open ended
1 point

A computer sends a frame to a device whose MAC address is not yet in the switch's table. Explain how the switch forwards the frame and how the device's reply can change the forwarding of later frames.

15
True or false
1 point

A mismatch in speed or duplex settings between Ethernet link endpoints can cause poor performance and errors.

  1. A

    True

  2. B

    False

16
Choose one
1 point

How does an Ethernet switch learn an entry for a MAC address in its MAC address table?

  1. A

    The source MAC address and the port on which the frame arrived

  2. B

    The destination MAC address and the port on which the frame will leave

  3. C

    The frame payload and its length

  4. D

    The FCS and the receiving device's IP address

17
Written response
1 point

An Ethernet MAC address is written as six pairs of hexadecimal digits. How many bits does the address contain? Enter a number of bits.

18
Choose one
1 point

What does full-duplex operation mean for an Ethernet link?

  1. A

    The devices take turns transmitting, and collisions can occur

  2. B

    The link transmits in only one direction

  3. C

    Both ends can send and receive simultaneously

  4. D

    The switch floods every unicast frame to all devices

19
Choose one
1 point

A device is connected directly to a switch port operating in full duplex. Which description fits this link?

  1. A

    Both ends can transmit and receive at the same time, without Ethernet collisions on the link.

  2. B

    Both ends can transmit at the same time, but neither can receive.

  3. C

    Devices take turns transmitting, and collisions are detected with CSMA/CD.

  4. D

    The switch sends every unicast frame to every device on the LAN.

20
Written response
1 point

What protocol acronym names the method traditional half-duplex Ethernet uses to detect collisions and retry transmissions? Enter the acronym.