Which of the following classes of languages can validate an IPv4 address in…
2020
Which of the following classes of languages can validate an IPv4 address in dotted decimal format? It is to be ensured that the decimal values are between 0 and 255
- A.
RE and higher
- B.
CFG and higher
- C.
CSG and higher
- D.
Recursively enumerable language
Attempted by 53 students.
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Correct answer: A
An IPv4 address consists of four decimal numbers separated by dots, each ranging from 0 to 255. Since the total number of valid IPv4 addresses is finite (specifically 256^4 combinations), the language of valid IPv4 addresses is a finite language. According to the Chomsky hierarchy, all finite languages are Regular Languages. Therefore, Regular Expressions (RE) or Finite Automata can be used to validate this format.