You support a datacenter that runs Microsoft Lync Server 2013 with Enterprise Voice (EV). The
company has opened two new satellite branches and configured one with a Survivable Branch
Appliance (SBA) and the other with a Survivable Branch Server (SBS). Neither branch has a DNS
server. A wide area network (WAN) outage occurs and EV stopped working for the branch users. You
need to ensure that EV functionality continues in the event of WAN outages. What are two possible
ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
A.
Enable backup Registrar discovery by configuring the SBA or SBS to respond to Dynamic Host
Configuration Protocol (DHCP) 120 queries.
B.
Enable backup Registrar discovery by configuring Dynamic Host Configuration Protocol (DHCP)
option 120 on the branch site’s DHCP server to point to the fully qualified domain name (FQDN) of
the SBA or SBS.
C.
Enable backup Registrar discovery by configuring Dynamic Host Configuration Protocol (DHCP)
option 55 on the branch site’s DHCP server.
D.
Enable backup Registrar discovery by configuring Dynamic Host Configuration Protocol (DHCP)
option 60 on the branch site’s DHCP server.
Explanation: