Is router really a layer 3 device? If it is a layer 3 device, then when we confiugre ACLs, we configure even the port numbers. And port numbers work at layer 5. Therefore can't we say that router is a layer 5 device?
On the other hand 2950 switch. The same thing. We can configure an IP address in interface VLANs. Therefore can't we call it a layer 3 device?
One more thing :)
Can we configure an IP address in the physical interface of a 2950? Because when you type "show run" you see something like this:
interface fastethernet 0/1
no ip address
Thanks in advance!
One thing I would add is that if configs are consistent, then it's 'easier' to move a config from one device to another (and still have it work the same way despite the new device). For example, from a 2950 to a 3550.
As David said, I wouldn't lose sleep over it.