1. Home
  2. Cisco Certification
  3. please help me with this question

please help me with this question

  1. Which of the following IP addresses fall into the CIDR block of
110.68.4.0/18? (Choose three.) A. 110.68.8.32 B. 110.68.7.64 C. 110.67.6.255 D. 110.66.3.254 E. 110.65.5.128 F. 110.64.12.128

The answer given is as following, but I don't think they are right. In my opinion, there are two right options A&B

B, C, E. A Class A network address with a /18 is 255.255.192.0. The subnets in the third octet are 0, 64, 128, 192. The network address in the question is

110.64.0.0, with a broadcast of 110.64.127.255, since the next subnet is 110.64.128.0. Answers B, C, and E are correct host IDs.
Reply to
leeloo.au
Loading thread data ...
  1. You have a network with a subnet of 172.16.17.0/22. Which are valid host addresses? A. 172.16.17.1 255.255.255.252 B. 172.16.0.1 255.255.240.0 C. 172.16.20.1 255.255.254.0 D. 172.16.16.1 255.255.255.240 E. 172.16.18.255 255.255.252.0 F. 172.16.0.1 255.255.255.0

The given answer is E only,but I think A is right too.

A Class B network ID with a /22 mask is 255.255.252.0, with a block size of 4 in the third octet. The network address in the question is in subnet 172.16.16.0 with a broadcast address of 172.16.19.255.

Reply to
leeloo.au

No, only E - check the subnet mask on answer A, it's /30

For the other one, yeh, only A and B look right to me

Reply to
John Petersen

I am not sure where they got their answers for this. However I'm going to agree with everybody else and say A and B are the only valid answers.

IP Address: 110.68.4.0 Network Address: 110.68.0.0 Broadcast Address: 110.68.63.255

I checked my subnet math aga> 11. Which of the following IP addresses fall into the CIDR block of

Reply to
Capt. Barbossa

I'm not sure where you got the information, but you may want to see if the website you got the study material from is in our database.

formatting link
If you're using testkings or anything of the sorts, you're risking your certifications.

Reply to
Robert Williams [CertGuard]

thanks,

Reply to
leeloo.au

Cabling-Design.com Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.