Like earlier Domain Health Surveys, this survey tested 5000 randomly selected COM Internet zones. This can cause host lookup problems or problems accessing or providing basic Internet services. The positive change clearly indicates increased awareness in regards to Internet security among on-line organizations.
Lame delegations slow down DNS traffic and lookups, and in some cases return failed lookups.
Some results of the Domain Health Survey for February '00 may indicate the availability of better tools and increased skill and awareness among DNS administrators managing the zones compared to November of 1998. Although some companies block zone transfers, their zones can still be checked for certain errors e.g. lame delegations, if their mail servers are up and running and if their zones do not contain MX records. No spoofing vulnerability check was performed by DNS Expert this time. Read about DNS spoofing at our spoofing site . Incorrect delegation can lead to long resolution times, and in some cases it can cause information within the domain to be inaccessible.