MAC Addresses Flashcards
MAC is the _________ address for our network interfaces
Physical
Each host in a network has its own __ -bit ( __ octets) Media Access Control (MAC) address
48-bit (6 octets)
different standards for the MAC address:
x3
Ethernet (IEEE 802.3)
Bluetooth (IEEE 802.15)
WLAN (IEEE 802.11)
the MAC address addresses the physical connection (network card, Bluetooth, or WLAN adapter) of a host
Each network card has its individual MAC address…….
The MAC address consists of a total of _ bytes.
6 bytes.
Each IP packet has a ______ address and a _______ address.
Each IP packet has a sender address and a destination address.
The first half of the MAC address (3 bytes / 24 bit) is the so-called _________ _____ _______ (OUI) for the respective manufacturers.
Organization Unique Identifier (OUI)
The last half of the MAC address is called the _________ _______ ____ or _______ _______ ________ (NIC), which the manufacturers assign. The manufacturer sets this bit sequence only once and thus ensures that the complete address is unique.
Individual Address Part or Network Interface Controller
If a host with the IP target address is located in the same subnet, the delivery is made directly to the target computer’s _____ address.
directly to the target computer’s physical address
If the Ethernet frame’s destination address matches its own layer 2 address, the router will ______ the _____ to the ______ _______.
the router will forward the frame to the higher layers.
______ _______ _______ (ARP) is used in IPv4 to determine the MAC addresses associated with the IP addresses.
Address Resolution Protocol
The last bit of the _____ octet identifies the MAC address as ______ (0) or ________ (1)
The last bit identifies the MAC address as Unicast (0) or Multicast (1)
With unicast, it means that the packet sent will reach only ___ specific host.
one
With multicast, the packet is sent ____ to all hosts on the _____ network, which then decides whether or not to accept the packet based on their configuration
With multicast, the packet is sent once to all hosts on the local network, which then decides whether or not to accept the packet based on their configuration
The second last bit in the first octet identifies whether it is a global OUI, defined by the IEEE, or a locally administrated MAC address
Global OUI is:
Global OUI (2nd to last bit in first octet is 0)
Representation 1st Octet
Binary 1101 1100
The second last bit in the first octet identifies whether it is a global OUI, defined by the IEEE, or a locally administrated MAC address
Locally Administered is:
Locally Administered (2nd to last bit in first octet is 1)
Representation 1st Octet
Binary 1101 1110
This involves altering the MAC address of a device to match that of another device, typically to gain unauthorized access to a network.
MAC spoofing
This involves sending many packets with different MAC addresses to a network switch, causing it to reach its MAC address table capacity and effectively preventing it from functioning correctly.
MAC flooding
Some networks may be configured only to allow access to devices with specific MAC addresses that we could potentially exploit by attempting to gain access to the network using a spoofed MAC address.
MAC address filtering
Address Resolution Protocol is a _____ protocol
network protocol
Address Resolution Protocol is AKA
ARP
ARP is used to resolve _____ (layer 3 of the OSI model) to a ______ (layer 2 of the OSI model) MAC address.
Network layer 3 of the OSI model to a
Data Link layer 2 of the OSI model
