[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] h2n maintenance tools 2nd 3rd 4th Hamilton, M., RFC 2182 Handbook of Applied Cryptography (ital) 2nd Harrenstein, K. RFC 952 Harrenstein, M., RFC 953 has-old clients option hash symbol (#) heartbeat intervals BIND help command nslookup whois database Hesiod zone hiding BIND version security 2nd networks hierarchy DNS distribution domain names TLDs HINFO (Host Information) resource record RFC 1035 HINFO record HMAC RFC 2104 HMAC-MD5 cryptography IP-SEC RFC 2403 TSIG updates Host Information resource record [See HINFO] hostnames illegal 2nd labels 2nd hosts IP numbers changing housing services Web servers moving 2nd 3rd Hubbard, K., RFC 2050 Huitema, C., RFC 1886 Huitema, C., RFC 2874 |