Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

valid hosts

I am preparing for the CCNA.  I was given the follwing practice question. Given subnet mask 255.255.254.0, which of the following can be assigned to hosts?  186.54.3.0, 175.33.3.255, 26.35.2.255, 152.135.7.0.

[For the CCNA in 2003 .254 was a valid mask. Is .254 a valid mask?]


Thanks.

4 REPLIES
Cisco Employee

Re: valid hosts

Yes, 255.255.254.0 is a valid mask.

The followings are valid hosts for the above mask:

186.54.3.0
26.35.2.255
152.135.7.0

New Member

Re: valid hosts

Could you explain how you came to the answers. So, with a 254 mask, there are no network nor broadcast addresses?

Thanks.

Said

Cisco Employee

Re: valid hosts

Here we go:

186.54.3.0 (mask: 255.255.254.0):

Network address: 186.54.2.0

Broadcast address: 186.54.3.255

175.33.3.255 (mask: 255.255.254.0):

Network address: 175.33.2.0

Broadcast address: 175.33.3.255

26.35.2.255 (mask: 255.255.254.0):

Network address: 26.35.2.0

Broadcast address: 26.35.3.255

152.135.7.0 (mask: 255.255.254.0):

Network address: 152.135.6.0

Broadcast address: 152.135.7.255

Hope that helps.

Re: valid hosts

Could you explain how you came to the answers. So, with a 254 mask, there are no network nor broadcast addresses?

Thanks.

Said

Hi Said,

Check out the below link for more explanation on subnetting,hope to help !!

http://articles.techrepublic.com.com/5100-10878_11-6089187.html

Ganesh.H

Remember to rate the helpful post

310
Views
5
Helpful
4
Replies
CreatePlease login to create content