http://narcozozoyidco52iexvi6hs7mrluric6tghnrpiaql3lars7tennxad.onion/glossary
V V2 - A type of onion address comprised of 16 characters, widely considered less secure and DDoS-proof than the alternative, v3 addresses. V3 - A type of onion address comprised of 56 characters, ostensibly more secure and impervious to DDoS than v2 addresses.