Free Practice Quiz Question List

3 Ethernet and Network Devices Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 Ethernet and Network Devices, test your knowledge, and prepare for your next test or exam.

20 questions

Choose one

1 point

Which device connects a computer to Ethernet or Wi-Fi and sends and receives link-layer frames?

A
It forwards packets between IP networks using routing information.
B
It connects a device to Ethernet or Wi-Fi and sends and receives link-layer frames.
C
It repeats incoming bits to every other port without selectively forwarding frames.
D
It adapts signals for a service-provider access medium.

Choose one

1 point

A receiver's Frame Check Sequence (FCS) check indicates that an Ethernet frame is damaged. What does the FCS provide?

A
It lets a receiver detect that a frame may be damaged.
B
It repairs corrupted data before the receiver processes the frame.
C
It identifies the IP network to which the frame must be routed.
D
It records the switch port associated with the source MAC address.

Choose one

1 point

In a typical network setup, what role does a wireless access point (AP) perform?

A
It necessarily routes traffic between different IP networks.
B
It forwards all incoming bits to every other port, like a legacy hub.
C
It provides Wi-Fi access and typically bridges wireless clients' traffic to a wired LAN.
D
It adapts signals for the service-provider access medium and cannot connect wireless clients.

Choose all

1 point

A switch receives frames in a local VLAN. Select all cases in which the switch floods a frame to other relevant ports.

A
It floods a frame when the destination MAC address is unknown.
B
It forwards every frame to every port, even when the destination port is known.
C
It floods a broadcast frame to the other relevant ports in the local network or VLAN.
D
It routes an IP packet between networks based on the packet's destination IP address.

Choose all

1 point

Select all devices that do not make forwarding decisions based on MAC or IP addresses.

A
A router forwards packets according to destination IP addresses.
B
A repeater regenerates or retransmits signals without making MAC- or IP-based forwarding decisions.
C
A switch learns source MAC addresses and uses them to forward frames.
D
A hub repeats incoming bits to its other ports rather than selectively forwarding frames.

True or false

1 point

A bridge connects LAN segments and forwards frames using MAC addresses.

A
True
B
False

True or false

1 point

A modem by itself necessarily provides both routing and Wi-Fi.

A
True
B
False

Written response

1 point

A host is sending traffic to a destination on a different IP network. What address does it use as the destination address in the local Ethernet frame?

Written response

1 point

Which Ethernet frame field identifies the payload protocol in Ethernet II, but indicates payload length in IEEE 802.3 framing?

Fill in the blank

1 point

When a switch records which device is reachable through the incoming port, it learns from the frame's .

Fill in the blank

1 point

Across a routed hop, the link's Ethernet MAC addresses usually change, while the packet's generally remain the end-to-end source and destination.

Open ended

1 point

A router forwards an IP packet from one Ethernet network to another. Explain what happens to the incoming Ethernet frame, how the packet is forwarded, and how the Ethernet MAC addresses compare with the packet's IP addresses across the routed hop.

Choose one

1 point

A basic, untagged Ethernet frame is described as typically 64–1518 bytes. Which statement correctly describes what this count covers?

A
The count always includes synchronization information sent before the frame.
B
The count is typically from the destination address through the FCS.
C
The count applies unchanged to every Ethernet variant, including VLAN-tagged frames.
D
The count excludes the FCS.

True or false

1 point

A MAC address is always a permanent, factory-set identifier for a network interface.

A
True
B
False

Choose one

1 point

What is the purpose of the Frame Check Sequence (FCS) in an Ethernet frame?

A
It repairs errors in the frame.
B
It helps the receiver detect whether the frame was damaged.
C
It identifies the destination IP network.
D
It synchronizes the transmitting interface with the switch.

Choose one

1 point

A host is sending data to a device on a different IP network. Which statement correctly distinguishes the roles of the destination MAC address and destination IP address?

A
The MAC address identifies a destination across networks, while the IP address delivers a frame on one local link.
B
The MAC address delivers a frame on a local link, while the IP address identifies a destination across networks.
C
Both addresses identify only the physical port on a switch.
D
Both addresses are used only when sending a broadcast.

Choose one

1 point

A frame arrives at a switch on port 4 with source MAC address 02:1A:2B:3C:4D:5E. What information does the switch learn from this frame?

A
It records the destination IP address and the outgoing router.
B
It records the frame's FCS and the incoming port.
C
It records the source MAC address and the incoming port.
D
It records every MAC address in the frame and sends the frame to all ports.

Choose one

1 point

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

A
Flood it to the other relevant ports in that local network or VLAN.
B
Send it only to the port with the numerically closest MAC address.
C
Discard it because switches forward only broadcasts.
D
Send it to the default gateway's port in every case.

Written response

1 point

What destination MAC address does an Ethernet broadcast frame use?

Written response

1 point

A common MAC address is written as six hexadecimal pairs. If each pair represents 8 bits, how many bits long is the address? Enter the value in bits.