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So my question is, where exactly does a MAC address come into play during a packet transfer?Where indeed? What is the specific function of the MAC address? The Answer SuperUser contributor Werner Henze offers some insight into the function of the MAC address: What are MAC addresses used for? MAC addresses are the low level basics that make your ethernet based network work.. If Mac programs list x x x x is in the same network, then the destination IP can be reached directly, otherwise the packet needs to be sent to the configured router.. 1 4 Data Type Labels VICAR uses system label items to keep track of the machine type the file (both image and binary label) was written on.

Since ethernet uses MAC addresses, the sender needs to get the MAC address of the next hop.

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y y y will respond with a packet “It’s me ” The asking device receives the answer and now knows that the source MAC address is the right MAC address to use.. y y y?” All devices receive that packet, but only the one with the IP address y.. x x x, then the first check is if the destination address is in the same IP network as the computer itself. Emulator Pc Games For Mac

So, MAC addresses are not used for packet transfer I don’t think it sits there for no reason.. How does ARP work?ARP itself is a protocol above ethernet, like IP or IPX When a device wants to know the MAC address for a given IP address, it sends a packet to the broadcast MAC address asking “Who has IP address y.. Network cards each have a unique MAC address Packets that are sent on the ethernet are always coming from a MAC address and sent to a MAC address.. With MAC addresses, there is no hierarchy, and thus packet forwarding would not be possible.. These label items are summarized below If a network adapter is receiving a packet, it is comparing the packet’s destination MAC address to the adapter’s own MAC address.

The Question SuperUser reader Vishnu Vivek is curious about MAC addresses and their function: I understand that IP addresses are hierarchical, so that routers throughout the internet know which direction to forward a packet.. Another protocol for example would be IPX When your computer wants to send a packet to some IP address x.. Once the sender has retrieved the MAC address of the next hop, he writes that target MAC address into the packet and sends the packet.. If the addresses match, the packet is processed, otherwise it is discarded 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.. How do IP addresses and MAC addresses work together? IP is a protocol that is used on a layer above ethernet.. Up to now things seem to have gotten worse, because now we have two IP addresses: one is the original IP packet’s target address, the other is the IP of the device to which we should send the packet (the next hop, either the final destination or the router).. Of course the result will be cached, so the device does not need to resolve the MAC address every time.. There is a special protocol ARP (address resolution protocol) that is used for that. 518b7cbc7d