Question : Problem: why do we telnet to ip at port 1080 what to check for

why do we telnet to ip at port 1080 and 443 what to check for and if we are able to telnet
what does that mean and if not what does that mean

Answer : Problem: why do we telnet to ip at port 1080 what to check for

if telnet gives error like could not open connection to host, connect failed...., then it means cannot connect.

Circumstance 1:
If we have a webpage that goes like 'https://www.abc.com/hello' and it doesn't work, we can telnet www.abc.com 443 to determine if the SSL connectivity is up or not. Sometimes its a router thats misconfigured, sometimes it may just be a software firewall causing problems.