Internal EIGRP Routes
Origin: These routes are learned from within the same EIGRP autonomous system (AS).
Administrative Distance: Internal EIGRP routes have an administrative distance (AD) of 90.
It is NOT external, it is internal, see the number 100
The next hop is 10.0.0.1 because it has a better administrative distance.
This would be correct if the administrative distance (AD) of the route via 10.0.0.1 is lower than the AD of the route via 10.0.2.1, making it the more trusted route even if the metric or protocol type is different.
Link-state routing (option C) and distance vector routing (option A) are less likely to be the primary reason unless explicitly stated in the route output.
I'd go D because
The longest-matching route is preferred first, if two routes have equal length, the AD is used. so router will choose 10.0.0.1 becuase EIGRP(90) have lower AD than OSPF(110)
Everyone who is saying you will not see this question in the exam, you are wrong. I came across this exact question when i took my exam this month. I am not sure if I got it right or wrong. I choose he path of eigrp 100.
in that case (Q471) protocol between Router A and Router B was RIP. so redestribution is required at Router B. in this case no redistribution its only EIGRP 100.
The correct answer is D.
This is an old question from the 200-125 exam that's been included here. Redistribution used to be on old CCNA exams but is no longer.
You can forget it and move on.
I agree with JuanluRea, see Router-B caption "Redistribution between EIRP and OSPF" and AS100 is the same, redistribution is for OSPF only. It would then be "AD 90" (not 170), answer D is correct!
Because we see EIGRP100 on both sides of Router B, EIGRP is forwarding routes to Subnet 10.0.0.0/30. We also have a redistribution from EIGRP into OSPF happeningthen subnet on Router 2 (a distraction) and advertising routes to subnet 10.0.1.0/30 and then subnet 10.0.2.0/30. So the EIGRP to EIGRP route exchange has the lower AD (AD 90) because it is in the same AS (AS100). Ergo the OSPF route will not be considered. I hope this helps?
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