A router receives information about network 192.168.10.0/24 from multiple sources. What will the
router consider the most reliable information about the path to that network?

A.
an OSPF update for network 192.168.0.0/16

B.
a static route to network 192.168.10.0/24

C.
a static route to network 192.168.10.0/24 with a local serial interface configured as the next hop

D.
a RIP update for network 192.168.10.0/24

E.
a directly connected interface with an address of 192.168.10.254/24

F.
a default route with a next hop address of 192.168.10.1

Explanation:
What Is Administrative Distance?
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094195.shtml
Select the Best Path Administrative distance is the first criterion that a router uses to determine
which routing protocol to use if two protocols provide route information for the same destination.
Administrative distance is a measure of the trustworthiness of the source of the routing information.
Administrative distance has only local significance, and is not advertised in routing updates. Note:
The smaller the administrative distance value, the more reliable the protocol. For example, if a
router receives a route to a certain network from both Open Shortest Path First (OSPF) (default
administrative distance – 110) and Interior Gateway Routing Protocol (IGRP) (defaultadministrative
distance – 100), the router chooses IGRP because IGRP is more reliable. This means the router adds
the IGRP version of the route to the routing table.