Which command sets the default static route to reach the internet via gateway 203.0.113.1?

Which command sets the default static route to reach the internet via gateway 203.0.113.1?

• A. /ip route add dst-address=0.0.0.0/0 gateway=198.51.100.1
• B. /ip route add dst-address=0.0.0.0/0 interface=wan
• C. /ip route add dst-address=0.0.0.0/0 gateway=203.0.113.254
• D. /ip route add dst-address=0.0.0.0/0 gateway=203.0.113.1

Answer: (D)

The main idea is to define a default route by sending all unspecified traffic to a single next-hop. In RouterOS, a default route is created by setting the destination to 0.0.0.0/0 and specifying the next-hop gateway IP. The command that does exactly that with the gateway 203.0.113.1 is /ip route add dst-address=0.0.0.0/0 gateway=203.0.113.1. This makes every packet destined for anything not in the routing table go through 203.0.113.1. Using a different gateway IP would direct traffic toward a different router. Using interface=wan instead of a specific gateway IP relies on the next-hop learned on that interface and does not guarantee a particular next-hop IP, which is why it isn’t the exact match for the specified gateway.

The main idea is to define a default route by sending all unspecified traffic to a single next-hop. In RouterOS, a default route is created by setting the destination to 0.0.0.0/0 and specifying the next-hop gateway IP. The command that does exactly that with the gateway 203.0.113.1 is /ip route add dst-address=0.0.0.0/0 gateway=203.0.113.1. This makes every packet destined for anything not in the routing table go through 203.0.113.1.

Using a different gateway IP would direct traffic toward a different router. Using interface=wan instead of a specific gateway IP relies on the next-hop learned on that interface and does not guarantee a particular next-hop IP, which is why it isn’t the exact match for the specified gateway.