Question

In IPv6 routing, what is represented by the "::/0" notation, and what is its significance in configuring a tunnel interface?

A) It represents the default route, and it defines the next-hop for packets.
B) It specifies the link-local addresses for routers.
C) It denotes a subnet with no available addresses.
D) It designates a local network.

Answer 1

The "::/0" notation in IPv6 routing represents the default route and is used to forward traffic to another IPv6 network through a tunnel interface.

Step-by-step explanation:

In IPv6 routing, the "::/0" notation represents the default route. It is used to specify that any IPv6 address is reachable through this route and it acts as a catch-all route for all traffic that doesn't match any specific route in the routing table.

The "::/0" notation is significant in configuring a tunnel interface because it allows traffic to be forwarded to another IPv6 network through the tunnel. By configuring the tunnel interface with the "::/0" route, the router acts as a gateway and forwards all traffic to the other side of the tunnel.
For example, if a router has a tunnel interface configured with the "::/0" route and the destination IPv6 address of a packet is not found in the local routing table, the router will use the tunnel interface to send the packet to the remote network.