Study the exhibit carefully. In this network, if all required configurations are true for routing. Subnet 10.1.1.0/24 is sourced by PG-A and advertised via BGP, OSPF, and EIGRP. Finally, PG-G knows this subnet. Which routing protocol and administrative distance can be used by PG-G to reach subnet 10.1.1.0/24?
A.
EIGRP, AD 90
B.
EIGRP, AD 170
C.
OSPF, AD 110
D.
BGP, AD 20
Explanation:
Lowest AD for prefix of same length
EBGP has lower Administrative distance. Which is 20. So what??? what a nice explanation on every website. Is this the way to learn? Copy and paste questions and answers from other websites? at the end all websites have the same funny answer which is just against the answer.
Could you please tell me the reason why the answer is not EBGP?
Is it because EBGP has loop prevention mechanizm and it will ignore the route advertisement when it will see it’s own AS number on the AS-PATH attribute?
Regards,
Ersan
Maybe lost in extraction … not all dumps must be 100% valid.
I agree, when in the Exam the Answer is EBPG, AD 20 – I too would click on that one.
But maybe it´s (I)BGP – with an AD of 200 (and a lost zero there)…
Who know´s but you know the best answer in both cases 😉
Let’s assume that the two BGP speakers are iBGP peers in AS100 (which is very reasonable). In that case BGP will always favor the iGBP over EBGP due to the neighbor type rule and therefore the route will be internal BGP and have a higher AD distance. therefore I do think this is correct