a). Yes,
b). That is one of the ways to block access to Tor: either block torproject.org (in which case you use the GetTor service or mirrors), or the DAs, in which case you can&#x27;t bootstrap. The way around that is to use bridges (unpublished relays to which you connect) or pluggable transports which now come bundled with Tor Browser. (<a href="https:&#x2F;&#x2F;www.torproject.org&#x2F;docs&#x2F;pluggable-transports.html.en" rel="nofollow">https:&#x2F;&#x2F;www.torproject.org&#x2F;docs&#x2F;pluggable-transports.html.en</a>)