For IPv6, the reverse lookup domain is ip6.arpa. This is known as a "recursive query" or "recursive lookup". DNSSEC works by digitally signing records for DNS lookup using public-key cryptography. Only if the lookup fails is the registry scanned. Locating services is done through a lookup service. MurmurHash is a non-cryptographic hash function suitable for general hash-based lookup. The TLB can be used as a fast lookup hardware cache. An index is any data structure that improves the performance of lookup. A trivial way to do lemmatization is by simple dictionary lookup. The VoIP E911 system is based on a static table lookup. Most software applications will compute small factorials by direct multiplication or table lookup. This provides a quick way to generate a lookup table for multinomial coefficients. Typically, these entries are kept sorted by column index for faster lookup. Switch statements can allow compiler optimizations, such as lookup tables. Then a sequential lookup checks the matching with codice 5.