The IP address can change, but the MAC address generally remains the same.įor a device on the network, such as a computer or a router, its IP address is assigned.And the anti-theft mode of sending process and receiving process is the same.ĭifferences between a MAC address and an IP addressīoth IP and MAC addresses are unique. However, IP addresses are equivalent to home addresses, while MAC addresses are equivalent to identity cards. In this way, even if a host steals the IP address, if the host does not have the corresponding MAC address, the packet will not be received. When a packet is sent to a host on the LAN, the switch will receive the packet first and maps the IP address in the packet into a MAC address according to the switching table, and then the packet will be forwarded to the host with the corresponding MAC address. In the process of communication, the MAC address and IP address are mapped one by one through the switch or router.
Based on the characteristics of the MAC address, the LAN selects the MAC address to identify specific users. So in theory, unless the network card is stolen, otherwise it cannot be counterfeited. The MAC serves as the identity card to prove the identity. The IP address is related to the MAC address. But MAC addresses can do because it is solidified in the network card inside and is immutable. IP addresses are only logical identifiers that can be changed by anyone, so they cannot be used as a specific factor in identifying a device. At the same time, there is also a growing need to prevent IP address theft. Today, many users use LAN to group hosts together and then connect to the Internet through intermediate devices such as switches or routers.īecause of the large number of hosts in the LAN, the need to distinguish between devices arises when uploading and recycling data. If no MAC address corresponding to the IP address is found on the switch, the switch will forward the destination to the device with the corresponding MAC address based on ARP. If the MAC address record is found, the data packet will be forwarded to the device with the corresponding MAC address. When the data packet reaches the switch, the switch will see the destination IP address of the data packet and check whether there is a MAC address corresponding to the IP address in the machine. The switch can find the MAC address of the local device based on the IP address in the network. ARP assigns network IP addresses to devices with corresponding MAC addresses. IP addresses and MAC addresses are associated by using the ARP(Address Resolution Protocol). The packets will be sent to the target host through this process. Let’s have a further look at this process.Īccording to the address of the target node, the initial node maps the IP address of the target node to the MAC address of the intermediate node to find the first intermediate node.Īnd then starts from the first intermediate nodes according to the IP address of the destination node map to the MAC address of the second intermediate node, so as to find the second intermediate node.Īfter the last intermediate node is found, the packets are mapped from the last intermediate node to the MAC address of the destination node according to the address of the destination node. Therefore, the MAC address is used to identify the location of the network device.ĭata packet transmission is a process in which packets on the network start from the initial point, constantly map the address of the target node to the MAC address of the intermediate node, and then start from the intermediate node until the final target node is found. The MAC address identifies a unique network adapter on a network. If a device has one or more network adapters, each network adapter must have a unique MAC address.
#What is the mac address for chromecast for mac
In the OSI model, the network layer at layer 3 is responsible for IP addresses, and the data link layer at layer 2 is responsible for MAC addresses.
It is also sometimes referred to as LAN Address, Ethernet Address, or physical Address.Ī MAC Address is a flash memory chip that is burned in a Network Interface Card when produced by the Network equipment manufacturer.
#What is the mac address for chromecast full
The full name of a MAC Address is Media Access Control Address.
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