Update _index.md
ARP / NDP are networking protocols, but most certainly *not* routing protocols ;)
@@ -44,7 +44,7 @@ as you want, and doesn't care what "kind" of addresses you give it.
After MetalLB has assigned an external IP address to a service, it
needs to make the network beyond the cluster aware that the IP "lives"
-in the cluster. MetalLB uses standard routing protocols to achieve
+in the cluster. MetalLB uses standard networking protocols to achieve
this: ARP, NDP, or BGP.
### Layer 2 mode (ARP/NDP)
