how do you find out the browser information for your mac computer

How Do You Find Out The Browser Information For Your Computer Code That Can

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I clicked a button and a field was automatically filled in with my computers MAC address.

How Do You Find Out The Browser Information For Your Computer Code That Can

Is there JavaScript code that can get the MAC address Is the MAC address sent in an IP header I was surprised I wasnt at least prompted to share this information.

The fact that this webpage is runninghosted on the router is key.

The reason it can do this, is because you are connected to the router via layer 2 in the OSI model.

The router simply looks up your IP address in the ARP cache to find its MAC address.

A website on the Internet is not connected to your LAN and will not be able to determine your MAC address.

This does not pose a security risk, and is required for IP traffic to work on an Ethernet network.

Depending on who you ask, these layers have different numbers, so Im going to use the names instead.

Ethernet is one example, and so is is the 802.11 family of wireless protocols; I list these because they use MAC addresses.

PPP, which is often used by modems, is another example of a link-layer protocol, but it does not use MAC addresses.

Data still has to be passed between machines that are directly connected to each other, but even if this is done using only protocols that use MAC addresses, it uses the MAC addresses of the two machines that are passing information between them at the moment, not the MAC address that started it all.

Your MAC address is only visible to the very first link in the chain -the one between your computer and the router- and it legitimately needs that, because thats how it tells data from your computer apart from data from other computers connected to it.

It cannot see the MAC addresses of anyone who is not directly connected to it in this way, because that information gets lost in the network layer.

So yes, your router can see your MAC address, but no one else can.

IPv6 allows (but doesnt require) computers to use MAC addresses in certain ways, and some implementations do this, but it has caused a lot of controversy.

It depends on the particular implementation of IPv6 that youre using; implementers dont have to leak your MAC address, and not all implementations do.

A Java application can easily retrieve your MAC and send it back to the webpage.

However you need to fix your second link (it points to a web page where no code is available).

As Dog Eat Cat World says, the MAC address is available to any host youre talking to on your LAN, which is what happens when youre talking to your local router.

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Making statements based on opinion; back them up with references or personal experience.

How Do You Find Out The Browser Information For Your Mac Computer