A network engineer designs a new dial plan and wants to block a certain range of numbers (8135100 through 8135105). What is the most specific route pattern that can be configured to block only the numbers in this range?
A network engineer designs a new dial plan and wants to block a certain range of numbers (8135100 through 8135105). What is the most specific route pattern that can be configured to block only the numbers in this range?
The most specific route pattern to block the numbers 8135100 through 8135105 is 813510[012345]. This pattern uses a set that matches any single digit within the brackets, thus only allowing the block of numbers from 8135100 to 8135105 and not beyond that range. Other options either block a broader range or do not accurately match the specified numbers.
This is correct. Your brain probably tricked you and assumed C may have been the correct answer. The problem is that the ^ symbol implies that the following digit is at the start of the string. Put yourself in the shoes of the exam writers and you'll see where they're trying to trip you on questions. Failures generate revenue or the tests would be easier.
https://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/3_1_2/ccmcfg/b03spchr.html#wp1029834
A is correct