table lookup


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms.

table lookup

Searching for one item in a list or matrix of data (the table). Table lookups are used in countless operations to obtain a value or set of values such as retail and wholesale prices, product descriptions, street addresses, network routes and machine addresses.

Software or Hardware
Table lookups are often performed by software routines. However, to speed up operations, especially in network routers and switches, they can be performed in hardware (see content-addressable memory). See lookup table, binary search, address resolution and routing protocol.
References in periodicals archive ?
In the program fragment just described, both table lookup operations use the same index T.
The implementation of the algorithm actually requires the development of two software programs: the first an on-line CRC table lookup algorithm, and the secons an off-line table builder.
Various table lookup options are provided with support for long lookup keys and results.
Its integrated hardware blocks--Crypto Security, Table Lookup Unit, Deflate Engine and Pattern Matcher--accelerate operations that are highly CPU-intensive with low power dissipation.