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Nowadays, people have a whole host of devices connected to their router via Ethernet, or WiFi. PCs, laptops, smartphones, tablets, smart devices, games consoles - to name a few. When their devices connect to the internet, websites and online services must communicate with them using their public IP address. A public IP address is a digital address that is given to you by your internet service provider.
However, that public IP address is assigned to your router - not each individual device in your home.
Why It Doesn’t Make Your Network More Secure
This means another address is needed for your router to correctly forward data to each individual device on your network. This local IP address is only visible within the local network or subnet your home. Those local IP addresses are used to identify each individual device. However, when devices want to communicate with the outside world via the internet - it is necessary to use a third address for networking to occur.
Each device on your network has a unique MAC address. A MAC address identifies each individual machine attached to a local network. A MAC address is assigned to your device when it is manufactured and is hardcoded into the firmware.
What is the difference between an IP address & MAC address?
If you click on a YouTube link, your request must travel, or 'hop' across many servers and routers to get to its final destination. Your public and private IP address stay the same throughout the journey, but the MAC address is constantly changing as your data hops around the world. When a router tracks outbound requests, it attaches the private IP address to them so that when packets return from the internet it knows which device to forward them to.
Because MAC addresses never change, they are a reliable tool for pinpointing the senders and receivers of data on a network. They are also an extremely useful diagnostic tool for network administrators to identify problems on their local network.here
Comment configurer le filtre d'adresse MAC WiFi sur un routeur WiFi ?
In addition, due to the fact that each device has a unique MAC address, MAC numbers can be used to block unwanted devices from communicating on a network. This process is called MAC filtering and is extremely useful if a hacker is attempting to hijack a network IP address. So not surprisingly, along with an IP address which is networks software , there's also a hardware address. Typically it is tied to a key connection device in your computer called the network interface card, or NIC.
The NIC is essentially a computer circuit card that makes it possible for your computer to connect to a network.
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A MAC address is given to a network adapter when it is manufactured. It is hardwired or hard-coded onto your computer's network interface card NIC and is unique to it.
The ARP is like a passport that takes data from an IP address through an actual piece of computer hardware. Once again, that's hardware and software working together, IP addresses and MAC addresses working together. For this reason, the MAC address is sometimes referred to as a networking hardware address , the burned-in address BIA , or the physical address.
Why You Shouldn’t Use MAC Address Filtering On Your Wi-Fi Router
As you've probably noticed, the MAC address itself doesn't look anything like an IP address see yours here. The MAC address is a string of usually six sets of two-digits or characters, separated by colons. These manufacturers all place a special number sequence called the Organizationally Unique Identifier or OUI in the MAC address that identifies them as the manufacturer.