1. That thing has a PS/2 port. The port was designed in 1987 and became obsolet when USB (1997) was introduced. It has a lot of multimedia keys. They became common in later half of the 90s. Your keyboard was likely produced sometime between 1995 and 2000.

2. It’s probably a rubberdome. You can easy check that by levering a key cap out. They are only clammed in and can be pushed back in again.

Based on the logo, it would have been made somewhere between 1998 and 2003. It is almost certainly a membrane keyboard.