![what is mac address of laptop what is mac address of laptop](https://www.dur.ac.uk/images/cis/LinkIT/MAC/win3.png)
When your computer wants to send a packet to some IP address x.x.x.x, then the first check is if the destination address is in the same IP network as the computer itself.
![what is mac address of laptop what is mac address of laptop](https://it.cornell.edu/sites/default/files/Wi-Fi/wifi-clip_image004.png)
Another protocol for example would be IPX. IP is a protocol that is used on a layer above ethernet. How do IP addresses and MAC addresses work together? There are special MAC addresses, one for example is ff:ff:ff:ff:ff:ff, which is the broadcast address and addresses every network adapter in the network. If the addresses match, the packet is processed, otherwise it is discarded.
![what is mac address of laptop what is mac address of laptop](https://www.windowsdigitals.com/wp-content/uploads/How-to-find-MAC-address-on-Windows-10-with-CMD.png)
If a network adapter is receiving a packet, it is comparing the packet’s destination MAC address to the adapter’s own MAC address. Packets that are sent on the ethernet are always coming from a MAC address and sent to a MAC address. Network cards each have a unique MAC address. MAC addresses are the low level basics that make your ethernet based network work. SuperUser contributor Werner Henze offers some insight into the function of the MAC address: Where indeed? What is the specific function of the MAC address? The Answer So my question is, where exactly does a MAC address come into play during a packet transfer? I don’t think it sits there for no reason.
![what is mac address of laptop what is mac address of laptop](https://i.pinimg.com/736x/9a/87/d1/9a87d16650132fb21df34b7bb7590b96.jpg)
So, MAC addresses are not used for packet transfer. With MAC addresses, there is no hierarchy, and thus packet forwarding would not be possible. I understand that IP addresses are hierarchical, so that routers throughout the internet know which direction to forward a packet. For example, let's take a network adapter with the MAC address "00-A0-C9-14-C8-29." The OUI (Organizational Unique Identifier) for the manufacture of this router is the first three octets ("00-A0-C9") is Intel corporation and the rightmost six digits represent the Network Interface Controller.SuperUser reader Vishnu Vivek is curious about MAC addresses and their function:
What is mac address of laptop serial number#
The second half (24 more bits) of the MAC address represents the serial number assigned to the adapter by the manufacturer.Īs shown in the above diagram, MAC addresses are 12-digit hexadecimalnumbers (48 bits in length or 6-byte binary number).These IDs are regulated by an Internet standards organization. The first half (24 bits) of the MAC address contains the ID number of the adapter manufacturer.MAC addresses are often considered permanent, but in some conditions, they can be changed.Ī 48-bit MAC address is represented as a string of six octets, "MM:MM:MM:SS:SS:SS".Sometimes, colons (:) are used instead of dashes (-). MAC addresses are expressed in hexadecimal notation.MAC addresses uniquely identify the adapter on the LAN.MAC addresses are linked to the hardware of the network adapters, hence they are also known as the "hardware address" or "physical address.".A MAC address is a 48 or 64-bit address associated with a network adapter.Media Access Control (MAC) address is a physical address that works at the data link layer of the OSI model.