Question

Exercise 17: IP addresses are important for computers to be able to communicate with each other on the Internet. They identify a 'host' (personal computers are a kind of host) and enable other hosts to pass information to it, similar to a home address for physical packages or mail. Develop a regular expression that matches a well-formed IPv4 address in dot decimal notation. An IPv4 address follows the scheme below: - Numbers that are separated by dots. - The first number is within the range of 0 and 223. - The second number is within the range of 5 and 255. - The third number is within the range of 0 and 255. - The fourth number is within the range of 0 and 255. - There may be a subnet mask at the end of the address, which has a slash '/' followed by a number between 0 and 30. Exercise 17: Test Strings: Test Suite (Should be ACCEPTED): - 127.0.0. - 192.188.254 - 1.211 - 6.147.-90.04 - 202.158..72 - 0.0.0. - 192.108.12 Test Suite (Should be REJECTED): - 14 - 128.2.14.237 - 127.0.o.00 - 192.10. - 233.134.2.3 - 0.0.: - 127.2.0.1 - 192.109 - 102.34 - 127..00. - .5.4.2- - 12 - 192.101..33

          Exercise 17: IP addresses are important for computers to be able to communicate with each other on the Internet. They identify a 'host' (personal computers are a kind of host) and enable other hosts to pass information to it, similar to a home address for physical packages or mail. Develop a regular expression that matches a well-formed IPv4 address in dot decimal notation. An IPv4 address follows the scheme below:
- Numbers that are separated by dots.
- The first number is within the range of 0 and 223.
- The second number is within the range of 5 and 255.
- The third number is within the range of 0 and 255.
- The fourth number is within the range of 0 and 255.
- There may be a subnet mask at the end of the address, which has a slash '/' followed by a number between 0 and 30.

Exercise 17:
Test Strings:
Test Suite (Should be ACCEPTED):
- 127.0.0.
- 192.188.254
- 1.211
- 6.147.-90.04
- 202.158..72
- 0.0.0.
- 192.108.12

Test Suite (Should be REJECTED):
- 14
- 128.2.14.237
- 127.0.o.00
- 192.10.
- 233.134.2.3
- 0.0.:
- 127.2.0.1
- 192.109
- 102.34
- 127..00.
- .5.4.2-
- 12
- 192.101..33

Added by Julia H.

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