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Destination MAC = C. Why: When A needs to send data to another host it first determines whether or not the detination host is on the local network. Upon determining that the destination is not local, A sends the data to it's configured default gateway, which is C.
- Source MAC = A Destination MAC = C Why: When A needs to send data to another host it first determines whether or not the detination host is on the...
- Generally, at the point in your diagram: Source MAC: A - as bridges and switches don't normally rewrite anything, so this will be untouched. Destin...
- Possibility 2. Source-MAC A is not changed by the bridge. Destination MAC is D if both computers are in the same broadcast domain.
The MAC addresses are used in the layer 2 of the frame, and the layer 2 define the local network. So, the destination MAC address is the address of your gateway if the final target is not on the same LAN.
Jul 13, 2010 · The destination MAC address is always that of the next-hop to the destination. For a destination like google.com, that is likely to be the MAC of the gateway associated with the default route on your machine. For broadcast packets, the special "all-stations" MAC address is used: ff:ff:ff:ff:ff:ff.
- What Are Mac Addresses Used for?
- How Do Network Switches Influence The Packet Flow?
- How Do IP Addresses and Mac Addresses Work Together?
- How Does Arp Work?
- Routing
- Other Use Cases For Mac Addresses
MAC addresses are the low level basics that make your local ethernet based network work. Local means that the network devices are either directly connected through a cable or by WiFi or over a network hub or network switch. Network cards each have a unique MAC address. Packets that are sent on the ethernet are always coming from a MAC address and s...
A hub has no intelligence and just connects the wires from all the attached network cables, so packets sent on the network are received by every other connected network adapter. Network switches have some logic inside and can forward or drop packets. When a network switch receives a packet on one port it needs to know to which port(s) to forward th...
IP is a protocol that is used on a layer above ethernet. Another protocol for example would be IPX. IP allows connecting of different local networks and thus forming a corporate network or the global internet. If IP packets are sent, then we still have the MAC addresses of sender and receiver in the packet and additionally the IP addresses of the s...
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.y.y.y?" All devices receive that packet, but only the one with the IP address y.y.y.y will respond with a packet "It's me." The asking device receive...
There is no routing based on MAC addresses. Low level ethernet and MAC addresses can only reach every device on the samenetwork (cabled or wireless). If you have two networks with a router in between you cannot have a device in network A send a packet to the MAC address of a device in network B. No device in network A has the MAC address of the dev...
Wireless access points often use MAC addresses for access control. They only allow access for known devices (MAC address is unique and identifies devices) with the correct passphrase.DHCP servers use the MAC address to identify devices and give some devices fixed IP addresses.Nov 16, 2021 · MAC addresses work with the card in your device that lets it connect wirelessly to the internet, called a Network Interface Controller (NIC). MAC addresses are used to identify which device is which on your local network so that data gets sent to your computer and not your roommate's smartphone.
Jan 9, 2024 · destination address in the context of networking is a unique identifier used to determine the final recipient of a data packet within a network. In simpler terms, it’s like the ‘address’ on a postal letter, guiding where the information should be delivered in a digital network.
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IP addresses are relevant on a global scale. They hold the final destination of the packet and can tell us which address the packet is originally coming from. In contrast, MAC addresses are used on a more local scale, and hold information about the next hop destination in the local LAN network.
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