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

A.
It is case sensitive.

B.
It cannot start with a hyphen.

C.
It must have at least one character.

D.
It supports IPv4 or IPv6 addresses, or fully qualified domain names.

E.
It cannot end with a hyphen.

F.
It supports the & character.

Explanation:
Cisco Unified Communications Manager supports the following formats in the host portion of a
directory URI (the portion after the @ symbol):
Supports IPv4 addresses or fully qualified domain names.
Accepted characters are a-z, A-Z ,0-9, hyphens, and dots.
The host portion cannot start or end with a hyphen.
The host portion cannot have two dots in a row.
Minimum of two characters.
The host portion is not case sensitive.

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/bat/9_1_1/CUCM_BK_C271A69D_00
_cucm-bulk-administration-guide-91/CUCM_BK_C271A69D_00_cucm-bulk-administration-guide-
91_chapter_01001110.html