You plan to create a disaster recovery site. You need to recommend which servers are required for the disaster recover site to ensure that IM and Presence information is available if the main site is unavailable. The solution must ensure that remote users can access the disaster recovery site. Which two roles should you include in the recommendation? (Each correct answer presents part of the solution. Choose two.)
A.	Director
B.	Mediation Server
C.	Front End Server
D.	Edge Server
Answer:C
You plan to create a disaster recovery site. You need to recommend which servers are required for the disaster recover site to ensure that IM and Presence information is available if the main site is unavailable. The solution must ensure that remote users can access the disaster recovery site. Which two roles should you include in the recommendation? (Each correct answer presents part of the solution. Choose two.)
A.	Director B.	Mediation Server C.	Front End Server D.	Edge Server