MAC Address Flashcards
What does MAC stand for in MAC address?
Media Access Control
True or False: A MAC address is a unique identifier assigned to network interfaces for communications on the physical network segment.
True
How many bits are in a standard MAC address?
48 bits
Fill in the blank: A MAC address is typically represented in hexadecimal format, separated by _______.
colons or hyphens
What is the format of a MAC address?
XX:XX:XX:YY:YY:YY
What are the first three octets of a MAC address known as?
Organizationally Unique Identifier (OUI)
True or False: MAC addresses can be changed by the user.
True
What is the primary purpose of a MAC address?
To uniquely identify devices on a local network
Which layer of the OSI model does the MAC address operate at?
Data Link layer
What type of address is a MAC address: unicast, multicast, or broadcast?
It can be unicast or multicast.
Fill in the blank: The last three octets of a MAC address are assigned by the _______.
manufacturer
What is the significance of a ‘locally administered’ MAC address?
It indicates the address is not globally unique and is assigned by the user.
What MAC addresses are used and is it across over the internet.
MAC addresses are used for communication within a LAN and are not routable over the internet.
What is the range of values for a single octet in a MAC address?
00 to FF in hexadecimal
What does it mean if the first octet of a MAC address is an odd number?
The address is a multicast address.
Which protocol uses MAC addresses for frame delivery?
Ethernet
What is a burned-in address (BIA)?
It is the original MAC address hard-coded into the network interface card.
Fill in the blank: A _______ address is used to send data to all devices on a local network segment.
broadcast
How can MAC addresses be used in network security?
They can be filtered to allow or deny access to the network.
What does the term ‘MAC address spoofing’ refer to?
The practice of changing a device’s MAC address to impersonate another device.
True or False: MAC addresses are routable on the internet.
False
What is the purpose of a MAC address table in a switch?
To map MAC addresses to specific ports for frame forwarding.
What happens if two devices on the same network have the same MAC address?
It causes network communication issues due to address conflicts.
What is the difference between a unicast MAC address and a multicast MAC address?
A unicast MAC address targets a single device, while a multicast MAC address targets a group of devices.
Fill in the blank: In a MAC address, the first octet indicates whether the address is _______ or _______.
unicast; multicast
