Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

DHCP Scope

Posted on 2009-07-07
5
Medium Priority
?
545 Views
Last Modified: 2012-08-13
can you tell me the DHCP scope, subnet mask by looking at something like 10.41.81.0/27?
0
Comment
Question by:miriggall
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 5

Assisted Solution

by:Ahmed Ezzat AbuRaya
Ahmed Ezzat AbuRaya earned 2000 total points
ID: 24800241
If you mean the valid IPs in the subnet.. (10.41.81.1 - 10.41.81.30)
0
 
LVL 5

Assisted Solution

by:Ahmed Ezzat AbuRaya
Ahmed Ezzat AbuRaya earned 2000 total points
ID: 24800244
/27 is 255.255.255.224
0
 

Author Comment

by:miriggall
ID: 24800314
I accept both your answers, but how do you know this.
0
 
LVL 5

Accepted Solution

by:
Ahmed Ezzat AbuRaya earned 2000 total points
ID: 24800393
/27 is a CIDR notation (Classless Inter-Domain Routing). You can read more about it here: http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

*Basically* (/27) means you have 27 bits set as '1' in the subnet mask: (11111111.11111111.11111111.11100000) (all in binary) when converted to decimal you have (255.255.255.224)  (To convert binary to decimal: http://www.wikihow.com/Convert-from-Binary-to-Decimal)

You can play with (http://www.subnet-calculator.com/cidr.php) and read more about VLSM (variable length subnetting mask if you are interested. There are many tutorials about it (e.g. http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800a67f5.shtml)

For your network 10.41.81.0/27,  (/27 = block sizes of 32 users) so you have IP range of (10.41.81.0 to 10.41.81.31) .. First IP and last IP (10.41.81.0 & 10.41.81.31) are not valid IPs (e.g. You can't assign them to hosts) so you are left with valid IP range of (10.41.81.1 - 10.41.81.30).

There are just lots of details and I don't know how much deep you want to know :) The links I gave you provide more detailed information if  you are interested.

Hope this helps :)
0
 

Author Closing Comment

by:miriggall
ID: 31600928
Excellent timely response.  thanks
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A Cisco router can be configured as a DHCP Server. There are advantages and disadvantages in making your Cisco router work as DHCP Server. Almost all the features for windows DHCP can be configured on Cisco-based DHCP server. Some of the features me…
Learn how to PXE Boot both BIOS & UEFI machines with DHCP Policies and Custom Vendor Classes
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …
Suggested Courses

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question