I am reading the wikipedia article of mac addresses and it states that the least significant bit of the most significant byte of the mac address of a NIC indicates the following:
If the least significant bit of the most significant octet of an address is set to 0 (zero), the frame is meant to reach only one receiving NIC. This type of transmission is called unicast. A unicast frame is transmitted to all nodes within the collision domain, which typically ends at the nearest network switch or router.
I have two computers each has a mac address where the least significant bit of the most significant byte is 0. That means when a frame is sent from the NIC over the ethernet line it is intended to be sent to one receiving NIC. Now I have both my computers wired to a Belkin router. A router avoids collision domain because each NIC has its own dedicated ethernet line. So what kind of collision domain is this article talking about?