MAC Address

Question 2

What does MAC stand for in MAC address?

Answer 2

Media Access Control

Question 3

True or False: A MAC address is a unique identifier assigned to network interfaces for communications on the physical network segment.

Answer 3

True

Question 4

How many bits are in a standard MAC address?

Answer 4

48 bits

Question 5

Fill in the blank: A MAC address is typically represented in hexadecimal format, separated by _______.

Answer 5

colons or hyphens

Question 6

What is the format of a MAC address?

Answer 6

XX:XX:XX:YY:YY:YY

Question 7

What are the first three octets of a MAC address known as?

Answer 7

Organizationally Unique Identifier (OUI)

Question 8

True or False: MAC addresses can be changed by the user.

Answer 8

True

Question 9

What is the primary purpose of a MAC address?

Answer 9

To uniquely identify devices on a local network

Question 10

Which layer of the OSI model does the MAC address operate at?

Answer 10

Data Link layer

Question 11

What type of address is a MAC address: unicast, multicast, or broadcast?

Answer 11

It can be unicast or multicast.

Question 12

Fill in the blank: The last three octets of a MAC address are assigned by the _______.

Answer 12

manufacturer

Question 13

What is the significance of a ‘locally administered’ MAC address?

Answer 13

It indicates the address is not globally unique and is assigned by the user.

Question 14

What MAC addresses are used and is it across over the internet.

Answer 14

MAC addresses are used for communication within a LAN and are not routable over the internet.

Question 15

What is the range of values for a single octet in a MAC address?

Answer 15

00 to FF in hexadecimal

Question 16

What does it mean if the first octet of a MAC address is an odd number?

Answer 16

The address is a multicast address.

Question 17

Which protocol uses MAC addresses for frame delivery?

Answer 17

Ethernet

Question 18

What is a burned-in address (BIA)?

Answer 18

It is the original MAC address hard-coded into the network interface card.

Question 19

Fill in the blank: A _______ address is used to send data to all devices on a local network segment.

Answer 19

broadcast

Question 20

How can MAC addresses be used in network security?

Answer 20

They can be filtered to allow or deny access to the network.

Question 21

What does the term ‘MAC address spoofing’ refer to?

Answer 21

The practice of changing a device’s MAC address to impersonate another device.

Question 22

True or False: MAC addresses are routable on the internet.

Answer 22

False

Question 23

What is the purpose of a MAC address table in a switch?

Answer 23

To map MAC addresses to specific ports for frame forwarding.

Question 24

What happens if two devices on the same network have the same MAC address?

Answer 24

It causes network communication issues due to address conflicts.

Question 25

What is the difference between a unicast MAC address and a multicast MAC address?

Answer 25

A unicast MAC address targets a single device, while a multicast MAC address targets a group of devices.

Question 26

Fill in the blank: In a MAC address, the first octet indicates whether the address is _______ or _______.

Answer 26

unicast; multicast