問題文
One anycast address of IPv6 is predefined by the addressing standard rather than being chosen by an operator. How is that address built, and where is a packet sent to it delivered?
選択肢
- The prefix that names the link is kept and the part naming the interface is set to nothing at all, so it looks like a unicast address of any interface on that link, and a packet sent to it goes to each of the routers on the subnet, every router being obliged to support it for the subnets it has interfaces on
- The prefix that names the link is kept and the part that names the interface is set to all ones, so it can be told apart from a unicast address of an interface on that link, and a packet sent to it goes to one of the routers on the subnet, every router being obliged to support it for the subnets it has interfaces on
- The prefix that names the link is kept and the part that names the interface is set to all ones, so it can be told apart from a unicast address of an interface on that link, and a packet sent to it goes to each of the routers on the subnet, every router being obliged to support it for the subnets it has interfaces on
- The prefix that names the link is kept and the part naming the interface is set to nothing at all, so it looks like a unicast address of any interface on that link, and a packet sent to it goes to one of the routers on the subnet, every router being obliged to support it for the subnets it has interfaces on