HOTSPOT
Your network contains an Active Directory domain named contoso.com. The domain contains two servers named Server1 and Server2 that run Windows Server 2012 R2. The servers have the Hyper-V server role installed. A certification authority (CA) is available on the network. A virtual machine named vml.contoso.com is replicated from Server1 to Server2. A virtual machine named vm2.contoso.com is replicated from Server2 to Server1. You need to configure Hyper-V to encrypt the replication of the virtual machines.
Which common name should you use for the certificates on each server? To answer, configure the appropriate common name for the certificate on each server in the answer area.
Answer: 
Explanation:
Hyper-V Replica Certificate Requirements
If you want to use HTTPS, then you will need to create certificates for the hosts/clusters in both the primary and secondary sites.
Reference: Use Hyper-V Replica over HTTPS/SSL: Configuring Certificates.