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I have been testing my broadband speed on a PC.  It is 10 years old and has this processor:   AMD A6 3500 Tri Core 2.1GHz.  Would the PC be  be capable of the speed testing I am doing?  I am using Ookla and getting about 450Mbps but it should (according to Virgin) be around a Gig. PC connects via a 25 metre cat6 cable.

Also there is and unmanaged switch in the line, when testing no other traffic would have been going through it. It has 1Gb ports but maybe being a cheapo item it isn't capable of throughput?  It is a D-Link DGS-1008D.

Any comments welcome,

I use my ISP (Virgin in the UK) router which I, perhaps naively, assume is kept up to date with security patches. I don't use the wifi embedded in the router.

Hanging off the router I have a wifi access point running the latest available firmware which is roughly five years old (that is, the date on the firmware is about five years ago).  Also I have some powerline adapters hanging off it which are quite old as well. Am I taking a big risk here, or is the fact that my elderly equipment is behind the NAT firewall in the router keeping me safe?