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Exam 200-301 topic 1 question 914 discussion

Actual exam question from Cisco's 200-301

Question #: 914
Topic #: 1

Refer to the exhibit. PC A is communicating with another device at IP address 10.227.225.255. Through which router does router Y route the traffic?

A. router A
B. router B
C. router C
D. router D

Show Suggested Answer

Suggested Answer: D 🗳️

by oatmealturkey at Feb. 14, 2023, 5:47 p.m.

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oatmealturkey

Highly Voted 2 years, 4 months ago

Selected Answer: D

Correct answer is D. Look for the longest match in the routing table.

upvoted 13 times

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Tdawg1968

Highly Voted 2 years, 1 month ago

Makes sense. /11 gives a block of 32. So we are working in the 2nd octet. 224 is the starting network address of that block which would cover up to 256. That would include 227.

upvoted 6 times

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matass_md

Most Recent 11 months ago

Selected Answer: D

Guys let's check the ranges : 10.0.0.0 /8 mask 255.0.0.0 has a BA =10.255.255.255 has the IP address included in range 10.128.0.0/9 mask 255.128.0.0 has a BA =10.255.255.255 has the IP address included in range 10.224.0.0/11 mask 255.224.0.0 has a BA= 10.255.255.255 has the IP address included in range but here we have the longest match /11 and the right answer. 10.224.0.0/15 mask 255.254.0.0 has a BA= 10.225.255.255 (we have the last 1 bit from HOST that gets added to Network Address) 224+1 10.223.0.0/24 mask 255.255.255.0 > BA= 10.223.0.255 10.224.0.0/24 mask 255.255.255.0 > BA 10.224.0.255 10.226.34.0/24 mask 255.255.255.0 > BA 10.226.34.255

upvoted 2 times

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hands

1 year, 2 months ago

Selected Answer: A

Answer is correct, Static routes have precedence over BGP routes.

upvoted 2 times

magarsaaaddaamuu

12 months ago

and prifix length has precedence over static routes. Answer is D

upvoted 2 times

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[Removed]

1 year, 2 months ago

Selected Answer: D

it´s D 10.227.225.255/11 Usable IP Range: 10.224.0.1 - 10.255.255.254

upvoted 1 times

hands

1 year, 2 months ago

You are not considering the type of route, this is a BGP route, Static routes has precedence over BGP routes.

upvoted 1 times

[Removed]

1 year, 2 months ago

no the logest prefix has precedence first, then lowest AD, then lowest metric.

upvoted 3 times

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CCNPTT

1 year, 8 months ago

Selected Answer: D

10.224.0.0/8 Obviously is included, but not the longest match. 10.128.0.0/9 Obviously is included, but not the longest match. 10.224.0.0/15 Starts: 10.224.0.0 Ends: 10.225.255.255 10.227.225.255 IS NOT included 10.224.0.0/11 Starts: 10.224.0.0 Ends: 10.255.255.255 10.227.225.255 IS included

upvoted 3 times

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Katsudontabetai

1 year, 8 months ago

The destination NWs containing the destination IP address (10.227.225.255) are 10.0.0.0/8, 10.128.0.0/9, and 10.224.0.0/11, and 10.224.0.0/11 is selected as the optimal route by applying Longest Match. Therefore, Router D with its next hop, 10.224.1.5, is the correct answer.

upvoted 1 times

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shaney67

1 year, 10 months ago

Trying to work out why it couldn't be switch C would the /15 not take precedence as it is the longest? and is in the range 10.226.0.1 - 10.227.255.254

upvoted 3 times

FutureCiscoEngineer

1 year, 9 months ago

Check again for the range, it starts from 10.224.0.1 not from 10.226.0.1.

upvoted 2 times

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Vikramaditya_J

1 year, 10 months ago

Selected Answer: A

The given destination IP address "10.227.225.255" falls and only available in the network "10.0.0.0/8", which goes via Router A with address 10.224.1.2. Let's see the IP ranges of all the given routes: 10.0.0.0/8 = 10.0.0.0 - 10.255.255.255 (Given destination IP "10.227.225.255" falls in this range) 10.128.0.0/9 = 10.128.0.0 - 10.191.255.255 10.224.0.0/11 = 10.224.0.0 - 10.255.255.255 10.224.0.0/15 = 10.224.0.0 - 10.225.255.255 Remaining last 3 subnets are out of picture here: 10.223.0.0/24 10.224.0.0/24 10.226.34.0/24

upvoted 4 times

AtousaF

1 year, 10 months ago

I assume 10.227.225.255 is part of this range : 10.224.0.0/11 = 10.224.0.0 - 10.255.255.255! so D is correct.

upvoted 2 times

zackynighty

1 year, 3 months ago

but we need to look at AD right? since both A and D is within range, which A has the lowest AD

upvoted 1 times

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DavidCisco

2 years, 2 months ago

Selected Answer: D

Comprobado, la respuesta correcta es la D, subnetear mirando las /

upvoted 2 times

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VictorCisco

2 years, 2 months ago

Selected Answer: B

only B is correct answer. 10.128.0.0/9 Usable Host IP Range: 10.128.0.1 - 10.255.255.254 it is contein the offered address

upvoted 1 times

studying_1

2 years, 1 month ago

reread the question, the destination ip address is 10.227.225.255, D is correct

upvoted 2 times

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lucantonelli93

2 years, 4 months ago

Selected Answer: D

The correct answer it's D

upvoted 2 times

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Midus

2 years, 4 months ago

10.226.34.0/24 mismatch 10.227 .. correct is 10.224.0.0/15 or no?

upvoted 2 times

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SVN05

2 years, 4 months ago

Can someone please explain in detail how do we go about this question? Thank you all.

upvoted 3 times

mageknight

2 years, 4 months ago

ip add 10.227.225.255 take place in the /11 subnet so the next hop is 10.224.1.5 = router D

upvoted 2 times

SVN05

2 years, 4 months ago

Thanks mageknight. I understand the process of how it routes but how do you calculate such a big subnet??!!!

upvoted 1 times

Stichy007

2 years, 4 months ago

you need to understand how to calculate subnets, with a /11 its in the second octet and each subnet is separated by 32. /9 = 128, /10 = 64, /11=32 . therefore 227 would be in that range.

upvoted 3 times

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Rynurr

2 years, 4 months ago

Selected Answer: D

I agree, correct answer is "D"

upvoted 4 times

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gewe

2 years, 4 months ago

that's right, correct answer is D.

upvoted 4 times

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