What is the IPv6 loopback ip address?
It is 0:0:0:0:0:0:0:1 It can also be expressed as ::1 IPv6 Subnetting; The design of the IPv6 address space differs significantly from IPv4. The primary reason for subnetting in IPv4 is to improve efficiency in the utilization of the relatively small address space available, particularly to enterprises. No such limitations exist in IPv6, as the address space available even to end-users is large. An IPv6 subnet always has 64 bits in its host portion. It therefore has a /64 routing prefix (the 64 most-significant bits). Although it is technically possible to use smaller subnets, they are impractical for local area networks because stateless address autoconfiguration of network interfaces (RFC 4862) requires a /64 address. IPv6 does not implement special address formats for broadcast traffic or network numbers, and thus all addresses in a subnet are valid host addresses. The recommended allocation for an IPv6 customer site is an address space of 80 address bits (prefix /48), but it may be
