An engineer configures Cisco UCM to prevent toll fraud. At which two points does the engineer block the pattern in Cisco UCM to complete this task? (Choose two.)
The asterisk (*) wildcard is used to match any sequence of characters, including an empty sequence. Therefore, it can be used to match any domain name in a SIP Route Pattern.
The other options are not correct because:
B) @: The @ symbol is used to separate the user name from the domain name in an email address.
C) !: The ! symbol is used to negate a character class.
D) .: The . symbol is used to match any single character.
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