It's like a chunk of the internet went down. Since it's not under our control, and not any settings of our network, your only choice would be to use another internet connection to see if that works.
FYI I'm using a TP Link router. Suddenly this morning I can't access a lot of websites but weirdly can still access Google, Twitter, Youtube etc. Itried connecting the Internet via hotspot from my mobile phone and my Internet seemed okay and I can access everything. So the problem must be the router right?
I tried hard to find solution on the Internet but still didn't work out. These including changing the MTU of my TP Link system. Suddenly a few hours later this problem stopped and I have no problem accessing all sites using via my wifi connection.
Question: Is the problem has to do with a bad connection from my wifi provider? Or is something wrong with my router? Or maybe a few hours later, the changes I made with the MTU started to take its effect?