An engineer enters this configuration on a voice router: dial-peer voice 99 pots destination-pattern 115. port 1/0/0 Which digits does the router send out of the port 1/0/0 after the user dials the…

Forwarding all four digits '1159' would occur only if digit stripping were disabled, but POTS dial peers strip the literal portion of the destination pattern by default.

Sending '115' would mean the wildcard-matched digit was stripped and the literal digits were kept, which is the inverse of how POTS dial peer digit manipulation operates.

Sending '59' is incorrect because the wildcard '.' matches exactly one digit, so only one digit - not two - is forwarded after stripping the literal '115' prefix.

Sending '11' has no relationship to the destination-pattern matching or digit stripping logic applied by this dial peer configuration.

The destination-pattern '115.' matches the dialed string '1159', where '115' are literal digits and '.' is a single-digit wildcard matching '9'. Cisco IOS POTS dial peers apply default digit stripping to remove the explicitly matched literal portion of the destination pattern, forwarding only the digit matched by the wildcard - in this case '9' - out port 1/0/0.