According to the CHFI v11 Dark Web Forensics domain, Tor bridge nodes are specifically designed to help users bypass censorship and surveillance in restrictive environments. Governments and ISPs often block access to Tor by identifying and filtering traffic destined for publicly listed Tor entry (guard) nodes. Once these entry nodes are blocked, users can no longer connect to the Tor network using standard configurations.

Bridge nodes solve this problem by acting as unlisted entry relays whose IP addresses are not published in the public Tor directory. As a result, censorship mechanisms cannot easily identify them. From a forensic and technical perspective, CHFI v11 explains that bridges effectively disguise the initial connection point, making Tor traffic appear less distinguishable from normal internet traffic---especially when combined with pluggable transports such as obfs4 or meek.

While Tor uses layered encryption (onion routing), that function applies to all Tor connections and is not unique to bridges. Bridge nodes do not host websites, and they are explicitly not publicly listed, making Option D incorrect. The key advantage bridges provide is concealing the Tor entry point, which prevents IP-based blocking.

CHFI v11 emphasizes understanding Tor infrastructure---including bridges, relays, and exit nodes---to correctly interpret dark web traffic and censorship circumvention techniques during investigations.

Therefore, bridge nodes assist users in accessing the Tor network by disguising their IP addresses and entry points, making Option C the correct and CHFI v11--verified answer.