Which call processing feature overrides the Do Not Disturb settings on a Cisco IP phone?

Which statement describes the Maximum Serving Count service parameter of the Cisco TFTP service
on Cisco Unified Communications Manager?

In a Cisco Unified Communications Manager design where +E.164 destinations are populated in
directory entries, which call routing practice is critical to prevent unnecessary toll charges caused by
internal calls routed through the PSTN?

Refer to the exhibit.

A user is going through a series of dialing steps on a SIP Type B IP phone to call a SCCP IP phone.
Both phones are registered to the same Cisco Unified Communications Manager cluster. Assume
that the calling SIP phone is associated with a SIP dial rule with a pattern value of “2001”.
Which statement about how digits are forwarded to the Cisco Unified Communications Manager for
further call processing is true?

Which option is a characteristic of the Enhanced Location Call Admission Control mechanism on
Cisco Unified Communications Manager?

Which two host portion format conditions are true for directory URI on Cisco Unified
Communications Manager? (Choose two.)

Which two user portion format conditions are true for directory URI on Cisco Unified
Communications Manager 9.1 or later? (Choose two.)

Which configuration parameter defines whether or not the user portion of a directory URI is case
sensitive on Cisco Unified Communications Manager 9.1 or later?

The number of calls waiting in a Cisco Unified Communications Manager native call queue has
reached its maximum limit.
Which statement about what happens to additional incoming calls is true?

A queued call has reached the maximum wait time configured for a Cisco Unified Communications
Manager native call queue.
Which statement about what happens to this queued call is true?