What is the purpose of the 127.0.0.0/8 loopback range, and what specific address is the standard loopback address used for software testing?

• A.The loopback address is 192.168.0.1; the 127.0.0.0/8 range is unused and was never allocated by IANA
• B.The 127.0.0.0/8 range is reserved for loopback (RFC 1122); packets sent to any address in this range are processed by the local network stack and never transmitted to any network interface. The standard loopback address is 127.0.0.1 ('localhost'); used to test TCP/IP stack functionality without network connectivity and to allow services to accept connections from the local machine only
• C.The 127.0.0.0/8 range is used for private addressing; 127.0.0.1 is the default gateway for all hosts on the 127.0.0.0 network; additionally, IPv6 dual stack means tunneling IPv6 packets inside IPv4 GRE headers on the same interface. A /26 subnet provides 126 usable host addresses once network and broadcast are excluded
• D.The 127.0.0.0/8 range is reserved for multicast; 127.0.0.1 is the all-hosts multicast group address