What is the most efficient subnet mask for a point to point ipv6 connection?
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The most efficient subnet mask for a point-to-point IPv6 connection is /127.
Explanation: In IPv6, a point-to-point connection is typically established using a link-local address and a unique local address. The link-local address is automatically configured and uses a subnet mask of /64, while the unique local address uses a subnet mask of /48.
However, when it comes to point-to-point connections, such as those between routers or switches, using a /64 or even a /48 subnet mask can be wasteful of IP addresses because there are only two devices in the connection.
Therefore, the most efficient subnet mask for a point-to-point IPv6 connection is /127, which provides two usable IP addresses: one for each end of the connection. The /127 subnet mask allows for a single network bit and seven host bits, which provides only two possible IP addresses, making it the smallest possible subnet for a point-to-point connection.
In summary, a /127 subnet mask is the most efficient choice for point-to-point IPv6 connections because it conserves IP addresses and limits the number of devices on the network to two.