You have implemented a tunnel in your network using DS-Lite. The tunnel is formed between one of the SRX devices in your network and a DS-Lite-compatible CPE device in your customer's network. Which two statements are true about this scenario? (Choose two.) 

The SRX device will serve as the softwire initiator and the customer CPE device will serve as the softwire concentrator. 

The SRX device will serve as the softwire concentrator and the customer CPE device will serve as the softwire initiator. 

The infrastructure network supporting the tunnel will be based on IPv4. 

The infrastructure network supporting the tunnel will be based on IPv6.