Some ISPs may be throttling or blocking Tor traffic due to its use in criminal activities. Your ISP cannot read your traffic or determine which website you are viewing because of onion routing. Your ISP will be aware that you are utilizing Tor, nevertheless. This is because Tor nodes' IP addresses are known to the general public. Tor Bridges offer a remedy for this issue.  Although it is not included in the main Tor directory, a bridge is still a Tor node. So your ISP won't be able to block all bridges. ISPs, however, have a fix for this. To ascertain whether Tor is being used, they examine packets. Let's make use of Pluggable Transports to alleviate this. Unfortunately, as a result, the packets are obscured and do not resemble Tor communication.