Think you're a computer expert?
Not even going to try. Unless you have freshly done some exams you're not going to know a lot of that. I did my Cisco & MCSE 10 years ago purely for the accreditation. Probably 98% of it I haven't used since. For instance RDP port being blocked by a firewall wouldn't happen on most corporate pcs because firewalls are turned off. I used RDP rarely as I mainly have connected via the internet to clients.