When you troubleshoot an IPv4 connectivity issue on a router, which three router configuration checks you must perform?
A . Verify that the router interface IP address IP address is correct.
B . Verify that the DNS is configured correctly.
C . Verify that the router and the host use the same subnet mask.
D . Verify that the router firmware is up-to-date.
E . Verify that a default route is configured.
F . Verify that the route appears in the Routing table
Answer: ABF