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Exam 200-301 topic 1 question 14 discussion

Actual exam question from Cisco's 200-301
Question #: 14
Topic #: 1
[All 200-301 Questions]

An engineer must configure a /30 subnet between two routes. Which usable IP address and subnet mask combination meets this criteria?

  • A. interface e0/0 description to XX-AXXX:XXXXX ip address 10.2.1.3 255.255.255.252
  • B. interface e0/0 description to XX-AXXX:XXXXX ip address 192.168.1.1 255.255.255.248
  • C. interface e0/0 description to XX-AXXX:XXXXX ip address 172.16.1.4 255.255.255.248
  • D. interface e0/0 description to XX-AXXX:XXXXX ip address 209.165.201.2 225.255.255.252
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️

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rugginic
Highly Voted 5 years, 2 months ago
answer is D. The up in A is a broadcast
upvoted 60 times
dendio
3 years, 7 months ago
Right, A is the broadcast address - it is explained in better detail here:
upvoted 4 times
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r8derfan33
Highly Voted 5 years, 2 months ago
Wait? What? Did you look at the subnet mask? 225.255.255.252?
upvoted 27 times
Ali526
4 years, 7 months ago
There is typo in D; should be 255.255.255.252. Having said that, it's the correct answer.
upvoted 5 times
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Tengereni
4 years, 3 months ago
thats a typo
upvoted 3 times
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jat1
Most Recent 1 month, 1 week ago
Selected Answer: D
D is the correct answer
upvoted 1 times
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Pirito
1 month, 1 week ago
Selected Answer: D
The subnet mask of D thst is incorrect
upvoted 1 times
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CertBroAll
2 months, 2 weeks ago
Selected Answer: D
ChatGpt said A then on it's own corrected itself while it was breaking it down.
upvoted 1 times
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Alisame
2 months, 3 weeks ago
Selected Answer: D
D is correct, A it is a broadcast address which makes it unusable, B & C are not point to point subnets, they have 6 usable IPs per subnet.
upvoted 1 times
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user8889
3 months, 1 week ago
Selected Answer: D
d is correct
upvoted 1 times
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Baracky
4 months, 3 weeks ago
Selected Answer: D
NONE of the options are fully correct — but if option A had used 10.2.1.1 or 10.2.1.2 instead of .3, it would be right and if Option D had used a correct subnet mask (255.255.255.252), it would be correct too.
upvoted 1 times
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Gold_rar
6 months, 1 week ago
Selected Answer: C
Answer D is not good. You have subnetmask 225.255.255.252. Why on first you have 225?
upvoted 2 times
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alylong
8 months, 3 weeks ago
Selected Answer: D
D is the answer. The first subnet of 209.165.201.x / 30, is 209.165.201.0-209.165.201.3. Hence, 209.175.201.2 is a host in this range.
upvoted 1 times
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[Removed]
10 months, 2 weeks ago
Selected Answer: D
A. interface e0/0 description to XX-AXXX:XXXXX ip address 10.2.1.3 255.255.255.252 Given address belongs to subnet 10.2.1.0/30, and it’s the broadcast address inside that subnet. Wrong answer. B. interface e0/0 description to XX-AXXX:XXXXX ip address 192.168.1.1 255.255.255.248 Given address belongs to subnet 192.168.1.0/29. Wrong answer. C. interface e0/0 description to XX-AXXX:XXXXX ip address 172.16.1.4 255.255.255.248 Given address belongs to subnet 172.16.1.0/29. Wrong answer. D. interface e0/0 description to XX-AXXX:XXXXX ip address 209.165.201.2 225.255.255.252 Given address belongs to subnet 209.165.201.0/30, which ranges from 209.165.201.1 to 209.165.201.2. Correct answer.
upvoted 8 times
Lexus_bong
1 year, 10 months ago
I still don’t understand how it calculate.
upvoted 2 times
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3040636
10 months, 3 weeks ago
A is the answer
upvoted 1 times
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Santini
1 year, 1 month ago
The answer is A. Yes it it a board cast address but it’s also a point to point link, which doesn’t need to utilize the broadcast IP. So we can assign it to a device instead. Plus the scenario doesn’t mention using public IP addresses go a routers to communicate. It’s could be a vpn connection for all we know.
upvoted 2 times
Santini
1 year, 1 month ago
Ohh another thing. Only switches broadcast and routers drop broadcast traffic by default. So all the broadcast discussion is non-sense.
upvoted 2 times
xtraMiles
1 year, 1 month ago
Agree! No broadcast in P2P. A is correct.
upvoted 1 times
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KuyaErik101
1 year, 4 months ago
Selected Answer: D
Correct
upvoted 2 times
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IU1CYF
1 year, 8 months ago
i think that there is also a typo in the question..."routes" instead of "router"...
upvoted 1 times
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doctot_tlc
1 year, 9 months ago
The Answers B and C are out because their submask have the prefix /29, in A the 10.2.1.3 is the broadcast of 10.2.1.0 network. The answer correct is D because 209.165.201.2 is the 2nd available IP for 209.165.201.0 network.
upvoted 4 times
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duongccna
1 year, 11 months ago
D, 4 subnet, 0 - 1 -2 -3 , 3 is broadcast and dont use 0
upvoted 1 times
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A (35%)
C (25%)
B (20%)
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