So the studying thing didn’t work out like I planned yesterday. Until now I’m still on Chapter 9. I’m seriously considering postponing my test date now. Today I almost cancelled the test date but held back because I might still be able to pull off an upset. But who am I kidding, right? As much as I want to get those initials, I don’t want to compromise true, solid learning just to get a certificate.

Well, I guess I need to perform another reality check and assess where I’m really at. It’s just a little frustrating that some people from another forums that I frequent make you feel a little “inadequate”, i guess, when I’ve been studying for nearly 2 months on only the CCENT part. I get some smarter-than-thou remarks wondering why I’m taking that much time when others prepare for the CCNA in less than 2 months and passing it. I mean, are you kidding me? How can you possibly digest so much information in less than 2 months and still pass a difficult test (unless you cheat, maybe)? I mean I know, it’s an entry-level test, but I’d like to come out of it knowing that I have a very solid foundation for the knowledge required to advance to the next level.

So, I guess back to square one again, in terms of the study schedule. I think I’m gonna stretch out the learning phase a little bit longer so that I’m getting less info for more time as opposed to cramming too much info in less time. I think people in general learn better that way anyway. And I’ll try not to pressure myself too much with achieving my goals as fast as I can. I think the idea is to achieve your goals the best you can.

Progress Report: It has only been 3 days since I started my updated study regimen and already I am over 60 pages behind. I’m supposed to be done with Chapters 10 and 11 today, but I just started Chapter 9. This is going to get ugly tomorrow when I’m supposed to do chapters 12, 13, and 14. No way I can do that.

Well, I guess I’ll call it a day and get some rest for an early 7am study session tomorrow. I plan to study all day so I’ll log how much I can get done tomorrow.

So tonight my wife and I watched Fantastic 4: Rise of the Silver Surfer. I thought it was really good. Then again, there’s not a lot of movies that I don’t like. I’m easy to please like that when it comes to movies.

It was a nice little break for me. My wife has been dropping some hints that I’m sort of neglecting my family from all the studying I’ve been doing. My wife ended up falling asleep, as she always does when we watch a DVD. So right after I tucked her into bed at 11pm, I run back donwstairs to resume some reading and note taking. I also planned to get a little bit more exposure with IOS commands on the switching topics I’m currently on. I guess I still feel a bit of pressure to stick to my scheduled chapter readings and study topics. My test is coming up in eight days and I still feel so unprepared. I really am considering re-scheduling my test. But I’ll see if I can stick it out til the very last minute before I have to re-schedule it.

Tonight I reviewed the following IOS commands:

line console 0
login
password xxxxxx

line vty 0 15
login
password xxxxxx

enable secret
enable password

debug
no debug all

show process
terminal monitor

reload

copy {running-config startup-config tftp} {running-config startup-config tftp}

write erase
erase startup-config
erase NVRAM

show system:running-config
show running-config

show nvram:startup-config
show startup config

There would be no need for Erratas.

Which of the following IP addresses fall into the CIDR block of 110.68.4.0/22? (Choose three.)

A. 110.68.8.32
B. 110.68.7.64
C. 110.68.6.255
D. 110.68.3.254
E. 110.68.5.128
F. 110.68.12.128

Answer: B, C, E.
A Class A network address with a /22 is 255.255.252.0. The subnets in the third octet are 0, 4, 8, 12, etc. The network address in the question is 110.68.4.0, with a broadcast of 110.68.7.255, since the next subnet is 110.68.8.0. Answers B, C, and E are correct host IDs.

Now, working out the problem the Odom way:

The binary equivalent of the prefix notation for /22 is 11111111.11111111.11111100.00000000. Converting that to decimal, you would get 255.255.252.0.

For the network part, just copy the first 2 octets of the subnet number, that is: 110.68

For the host part (the 4th octet, since the binary value is 00000000, the decimal value is: 0

To solve for the 3rd octet, subtract 252 , the 3rd octet of the subnet mask from 256:

 256
-252
     4

That means that the 3rd octet of the subnet will increment by 4 for each consecutive subnet blocks. Looking at the list of the subnets we can find specific hosts that fall in the given subnet block above. Here are the first few range of subnets:

110.68.0.0 – 110.68.3.255
110.68.4.o – 110.68.7.255
110.68.8.o – 110.68.11.255
110.68.12.0 – 110.68.15.255
and so on…

Going back to the original question, it asks what IP address from the given choices fall in the subnet block of 110.68.4.0. If you look at the list above, the second range is what we want to compare the choices from. Using that, B,C and E are the correct answers.

11.) 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

Answer: 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 of110.64.127.255, since the next subnet is 110.64.128.0. Answers B, C, and E are correct host IDs.

Here’s how I solved it:

Prefix /18 –> 11111111.11111111.11000000
Decimal equivalent: 255.255.192.0

The zero subnet for the given network should be 110.68.0.0. Based on what we know of Network Classes, this is a class A network with the first octets defining the network. In the explanation given, it mentions that the network address is 110.64.0.0. That doesn’t make sense to me because even though it is a Class A network, the first two octets can’t change since the first two octets of the given mask is 255.255.

Using Wendell Odom’s technique in the ICND1 exam guide:
256 –> Total number of decimal values in an octet
-192 –> decimal value of the masks 3rd octet.
= 64 –> The subnet blocks for the 3rd octet.

Therefore the range of IP addresses for this subnet block are:
110.68.0.0 –> Subnet number
110.68.64.0 –> Next non-zero subnet

Therefore the valid IPs for host are 110.68.0.1 – 110.68.63.254. The only IP addresses in the choices given that fall under this range are choices A and B.

Am I wrong on this?!?!

update (03.11.08):
Link to a few responses from Techexams.net forums:
http://www.techexams.net/forums/viewtopic.php?t=32073

You maybe asking yourself, after seeing my state of the art home lab setup, how and where I got my information on how to put together a better than “good enough” lab for CCNA.

Well, ask no further, cause I got such a link for you. Go to Wendell Odom’s CCNA Lab Blog and get all the basic information you need to get started. But make sure you do some leg work as well and research some of the features and capabilities of the item you want to purchase. Ask questions on forums, such as from the good folks of techexams.net. There are a lot of people who are always willing to help. A little hint, if you go to the CCNA/CCENT section, that’s where you’ll find me lurking about.

And when you’re ready to take the plunge, I’m in the know among some of the industry experts where you can pick up some good deals on these babies. But it’s just between you and me, ok? We don’t want too many competitions. Ready? Here it is: ebay.com

Today I planned out my over-achieving and impossibly lofty goal of reviewing the rest of the book (CCENT/ICND1 Official Exam Certification Guide, 2nd Edition, Wendell Odom) by next week. I just finished reviewing chapters 1-3 yesterday and today and I’ll be picking up tomorrow on chapter 4. Mind you, it took me a month and a half to get through 600 pages of materials and I’m trying to review it from cover to cover, again, in a little over a week. Go figure. Although I don’t think I can make it happen, I have to at least shoot for it. Just like Jesus said in the great book of Isiah to Thomas, “the only shot that you don’t make is the shot you don’t take.” Ok I’m kidding. Jesus didn’t say that and Isiah didnt write an epistle to Thomas. In fact Isiah Thomas is one person who played for the Detroit Pistons in the 80s. The quote is from Wayne Gretzky, and that’s not even the exact quote. So go figure.

Top this:

March 4, Tuesday – Chapter 4 & 5
March 5, Wednesday – Chapter 6 & 7
March 6, Thursday – Chapter 8 & 9
March 7, Friday – Chapter 10 & 11
March 8, Saturday – Chapter 12, 13 and 14
March 9, Sunday – Chapter 15, 16 and 17

March 10, Monday – Cbt Nuggets
March 11, Tuesday – Cbt Nuggets
March 12, Wednesday- Practice Tests
March 13, Thurday – Practice Tests
March 14, Friday – Review
March 15, Saturday – SHOWTIME

Here’s a couple of pics of my home lab setup I use to study for CCNA.

Ok, I don’t know why I put 2 pictures on here since they’re essentially the same – just a slightly different angle. But I guess the more of the same thing, the happier the king.

Anway, going from top to bottom we have:

• 1720 router
• Catalyst 2950 Switch
• 2611 router
• 2620 router
• 3620 router
• 2514 router

Right now I’m waiting for another 2950 to arrive.

As far as what my plans are on how I’m going to desing my logical topology, it’s coming along. This whole thing is a good learning experience for me. As much fun as it is to receive a new box in front of your door every other day, it’s equally fun researching what these babies can and can’t do; what parts, modules, add-ons to get; what kind of cabling works for what, and all that jazz. Basically it’s forcing me to learn without feeling forced.

Up next is a mount rack to mount all these babies to and either a 2509 or 2511 access server.