Search specialized certification training options on the HLT site [Home] Click for the Site Map HERE

WWW This Website  

Click HERE to go directly to our current schedule of classes  08/27/2009

Select the correct base network ID for /22
HyperLearning Certification Training Virginia Beach Norfolk VA Chesapeake VA Navy Bases Tidewater Community College

HyperLearning Technologies Micorsoft MCSE MCSA MCP MCDST MOUS MOS SBS certification, Cisco CCNA CCNP Firewall VPN, CompTIA A+ Network+ N+ Security+ S+ CEH SCP Virginia Beach, Norfolk VA Chesapeake, Portsmouth VA
bullet Are you eligible for FREE TUITION or HALF-PRICE tuition for computer training and computer certification? Click HERE for details.
bullet Microsoft Certification Exam Insurance "Microsoft Second Shot" is  Baaack!  (Well, almost - it's "HyperLearning Second Shot" now,  you'll have to pay for Microsoft CertSafe Exam Insurance, but not for HyperLearning's Second Shot.) See details below, or Click HERE for more details
bullet If this is all Greek to you, check out Computer Training How, Where, Do I Start?

Weekly Blog - What's Happening Now?

Schedule - Class Announcements
Master Class Schedule
Daytime Classes
Corporate classes
Nite & Weekend Classes
Nite & Weekend Classes
Microsoft Certifications
Microsoft Office Training / MCAS
A+ Network+ Security+
Fiber Optics & Cat-5
Computer Security
DoD Inst 8570.01-M Mandate
Project Mgmt & PMP
About HyperLearning
Contact Us
Site Map
Price List

add to GOOGLE
add to DEL.ICIO.US
add to DIGG
add to FURL
add to REDDIT
add to SQUIDOO
add to ASK

This is an email reply to a student

It is, however, a great tutorial on Network+, IP subnetting, or any Cisco problem. The student is referring to the Will Harper Cheat-sheet (and my mistake in the explanation). I'm including it for 2 reasons. It explains the answer to the problem - and it demonstrates a student who thinks for himself, in the face of contradictory information. To refer to the Will Harper IP Subnetting Cheat-sheet, use this link.

(Student) I need your help!...My ... daughter mistakenly took my notepad which I had class notes in and summarily lost it. In those notes we're my various explanations for sub-netting as I understood them. They worked and I knew I would have to refer to them for further study. Alas now they're gone. I was doing my homework last night at work and couldn't figure out for the life of me how to get to my answer. I went to the Internet and started reading RFC's on subnetting and visited several sites on the subject which only confused me to no end [emphasis added]. Therefore I need your explanation again as to how to use the chart to achieve my answers. IE:

Select the correct base network ID for /22

Possible answers:

I can't remember the formula (steps used to achieve the answer using your chart). Please help.

(Trainer) Select the correct base network ID for /22 from the Will Harper IP Subnetting Cheat Sheet

The CIDR mask /22 is 2-bits into the B-hosts Octet. E.g. Mask bits are 1111 1100 0000 0000 That means that the Subnet bits are The first 6 bits of the IP address and the host bits are the last 2 of the IP address IN THE 3rd Octet. (Can you find the error in this explanation?  The student did.)

45, in bits is 64=0
                  32=1 45-32=13
                    8=1 13-8=5
                    4=1 5-4=1

Hence the bits in the IP address 45 are 0010 1101

Inspecting the mask, and noting that the "Subnet bits" are all BUT the last 2 bits

Hence the network IP is 0010 1100 0000 0000 or 44.0 (set all of the host bits to 0).  Since /22 is masking in the 3RD OCTET, the first two octets always remain the same.


(Student) Looking at the [Will Harper IP Subnetting Cheat Sheet] chart going across, the mask correlates to 252...

(Trainer) Gotcha! I was just testing you (do you believe that?). The 252 mask in the chart is correct, NOT 248.

Sounds like you have pretty well mastered this lesson. The question, "Select the correct base network ID" is a simple matter of first, determining which bits in the MASK are host bits (by figuring out which ones are network bits); then reduce the "people" IP ADDRESS to bits; then identify the host bits in the IP address; then apply the simple rule, "the subnet IP address is the IP address you get when you set all of the HOST BITS in the IP ADDRESS to zeros." The final step is to convert the zero-host-IP bits back to a "people" IP Address, so you can type it in.

Click HERE to ask for additional information.  HyperLearning specializes in Microsoft training, computer security training, CompTIA training, ACES Fiber Optic / Cat 5 / Cat-6 installer training. We focus on YOUR CERTIFICATION. Located in Virginia Beach, serving Norfolk VA, Chesapeake VA, Portsmouth VA, and all of the Hampton Roads Virginia areas.
sign up for computer certification training at HyperLearing Technologies in virginia beach chesapeak va or norfolk va serving Naval Air stations Navy bases and Tidewater Community College TCC
Return to top of page continue mcse mcsa computer security sbs certification training search 

We offer many easy ways to pay for your computer training and certification programs, including Visa and MasterCard  Click this icon to obtain a BBB report on computer training and certification Virginia Beach, serving Norfolk VA, Chesapeake VA, Suffolk VA, Portsmouth VA and Tidewater VA and Hampton Roads VA   computer training from a microsoft gold certified partner for learning solutions CPLS

If you have any questions or would like more information about our training or services, email or call or fax George Geyer, Will Harper, or Roger W. Geyer

HyperLearning Technologies
Microsoft Gold Certified Partner for Learning Solutions (CPLS)
Computer Training, Computer Certifications, Computer Bootcamps, Computer Classroom Rentals, Corporate Training and Corporate Meeting Rooms

google map to this location

HyperLearning has moved to a bigger, better training facility on Feb 18, 2008.
Please update your records and visit us soon!
Click HERE to view Photographs
HyperLearning Technologies
3630 S. Plaza Trail, Suite 250
Virginia Beach, VA 23452
Phone:  757.495.0714 (Training Center)
757.495.5487 (Home Office)
757.651.1117 / 377.3165 (Cell)
Call any time between 8:00 AM and 8:30 PM.
After 5:00 PM, call the Training Consultant line, direct, at (757) 651-1117.
(Training Consultant direct line is not open until after 5:00 PM)
Fax: 757.495.3725
email: Please type 'George.Geyer' '@' '' into your email address to email HyperLearning Technologies' President. Providing Microsoft training, CompTIA training, and computer security trainining in Virginia Beach, Norfolk VA, Chesapeake VA, Suffolk VA, Portsmouth, and all of Tidewater and Hampton Roads / Newport News


[Projected Certification Training Night Class Schedule ] [ Technology Certification Certification Training Capabilities at HyperLearning Technologies in Virginia Beach ] [ Microsoft MSCE MCSA MCP MCDST MOUS / MOS / MCAS Certification Training ] [ Data Cabling Fiber Optic Training and Certification ] [ Computer Security Training and Certification ] [ PMP Project Management Professional PMI Credential ] [ About HyperLearning Technology Certification Training ] [ Facility Description Nine and Twelve Student Hands-on Classrooms ] [ What Customers are Saying ] [ Web-based eMail Contact Form ]


CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, Cisco IOS, Cisco Systems, the Cisco Systems logo, and Networking Academy are registered trademarks or trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other countries.  MCSE, MCSA, MCP, MCDBA, MCDST, MOUS / MOS, Windows Server 2003, Small Business Server 2003, SBS 2003, Microsoft Exchange, Microsoft ISA server, Microsoft Official Curriculum, MOC, Windows XP, Microsoft Certified Trainer, MCT Microsoft Certified Business Partner and other Microsoft related logos are registered trademarks of Microsoft Corporation. A+, Network+, N+, Security+, S+, Linux+, Server+, Certified Technical Trainer, CTT+ and CompTIA logos are registered trademarks of CompTIA.  Transcender Practice Certification Tests and Transcender partner logos are registered trademarks of Transcender Corporation. VUE / Prometric certification test numbers and the VUE /Prometric logos are registered trademarks.  All other trademarks mentioned in this document or Web Site are the property of their respective owners.


Hyperlearning Technologies is Certified to operate in Virginia by the State Council of Higher Education of Virginia. VA or the "GI Bill" (Veterans Education Benefits) is available for all the computer training programs we offer. Hyperlearning Technologies is also an approved training contractor for the Virginia Workforce Redevelopment financial assistance program.  Providing computer training and certification training for all of Hampton Roads Virginia, from the Peninsula to Southside, including Newport News VA, Hampton, VA, Yorktown. Phoebus, Portsmouth VA, Suffolk VA Chesapeake VA, Norfolk VA, and Virginia Beach.

Webmaster Will Harper, MCSE, MCT, CCNA 08/27/2009 22:39

(Other sites maintained by webmaster, )