如图所示,RTA已经配置了各接口地址并使能了NAT-PT功能。现要求在RTA上配置一对一的静态NAT-PT映射。则哪一个配置是正确的?()
A. [RTA]natptv6boundstatic1::21.1.1.2RTA]natptv4boundstatic1.1.1.31::3
B. [RTA]natptv6boundstatic1::21.1.1.3RTA]natptv4boundstatic1.1.1.21::3
C. [RTA]natptv6boundstatic1::21.1.1.3RTA]natptv4boundstatic1.1.1.31::3
D. [RTA]natptv6boundstatic1::31.1.1.3RTA]natptv4boundstatic1.1.1.21::2