When a device learns multiple routes to a specific network, it installs the route with:
A. Longest bit Match (highest subnet Mask
B. lowest AD (Administrative distance)
C. lowest metric
D. equal load balancing
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Cisco says: The longest prefix match always wins among the routes actually installed in the routing table, while the routing protocol with the lowest administrative distance always wins when installing routes into the routing table.
So it’s B for sure.
Correct answer is A
Longest bit match route will make it to the routing table first.
If the subnet mask are equal, then lowest AD wins
the question is “it installs..”? so is about ading routes to routing table, routes are added to routing table based on AD so correct answer is B. on the other hand, forwarding decisions are made based on the longest bit match, but that is totally different question, routes are already installed on the routing table when the forwarding decision is made
B is the correct answer. “A” is wrong because the question is about learning a route – install routes into the routing table.
The lowest AD always wins when installing routes into the routing table. After learning a route into the routing table the longest bit match wins between the routes.
You are right, the lower AD is added to the routing table.
Correct Answer is: B
The longest match win, the correct answer is A. AD is only used for equal match
https://learningnetwork.cisco.com/thread/10603
Which route will be preferred to route 192.168.1.2?
EIGRP 192.168.1.0/24 ( AD 90)
or
RIP 192.168.1.0/25 ( AD 120)
correct answer A