Subneting on the current CCNA exam

[andreyts]

Does any body now if i need to divide 2 subnets from my entire sunets on the exam? Please advise ASAP , I am going to do my CCNA on Monday.

Thanks ,
Andrey

 

[andreyts]

For example the question that o took from boson:
Given a class B address and subnet mask 255.255.255.240, what is the maximum numbers of subnets and hosts?
a)networks=4094,hosts=16
b)networks=4094,hosts=14
c)networks=16,hosts=16
d)networks=4096,hosts=14

I think its a 'b' answer (and boson also) , but the question is what cisco whant to hear about that. If they finally know that they have a solution for subnet zero?
What I am supposed to mark on the exam?
This is very easy question and this is the reason that i dont whant to lose a point on this....
I need your profsional advise...

 

[CiscoGuy33]

andreyts,

If you mean VLSM (variable length subnet mask) or "subnet in a subnet" - YES it is now part of the new CCNA.

Subnetting in some form was part of at least 10 questions that I recall.

GREAT website -

http://www.howtosubnet.com/

Good luck on the exam.

E.A. Broda
CCNA, CCDA, CCAI, Network +

 

[andreyts]

No , I know that VLSM is the part of the exam , My friend told me that on the new version of CCNA you not need to divide subnet zero from entire number of the subnets , i want to know if its true?

 

[CiscoGuy33]

andreyts,

Oh you ment do you subtract 2 subnets (not divide)when "no subnet 0" is in use.

I found that the question will define what they are looking for by the way they word the question.

I saw both types of questions - some with subnet 0 some without.

Hope this helps!

E.A. Broda
CCNA, CCDA, CCAI, Network +

 

[jsstandl]

I've taken 8 Cisco exams in the past year and I'm pretty sure that I've never seen them count the all "0's" or all "1's" in the subnet or host count. So I'd agree that Cisco would be looking for the correct answer to be "B:"

JSStandl
CCNP
Firewall Spec.
IDS Spec.

Network Admin
MCSA, CCNP

 

[andreyts]

and on the network ? they are also not counting all '1' and all '0'?

 

[CiscoGuy33]

andreyts,

As I said you better understand the difference between the 2 concepts as in "What does ip subnet 0, and no ip subnet 0 " do.
I saw a posting that had a question such as this - router has been configured for ip subnet 0, your subnet mask is 255.255.255.248, configure the ethernet 2 interface with the 1st useable IP address on the 5th subnet.

If you DO NOT understand the difference with the "ip subnet 0" command - you will use the wrong IP address. That post looked so much like questions I have seen.

In your question above it is not clear if "ip subnet 0" is in use, in my experience on 4 different Cisco exams - Cisco makes it CLEAR what they want for an answer, sometimes they have stuff in the question to let you know and on others they only have 1 answer that will fit - they would not have both answers.

Do not look for absolutes on the Cisco exam - read each question and answer based on what you know and what Cisco is asking you.

I hope this helps!!

E.A. Broda
CCNA, CCDA, CCAI, Network +

 

[andreyts]

Just for an update I passed the test today. Thanks for all the helpful posts.

 

[CiscoGuy33]

GREAT JOB andreyts

Welcome to the CCNA Club !!!!

E.A. Broda
CCNA, CCDA, CCAI, Network +

 

[spazmahoney]

According to ODOM's Cisco Press book, they will specify subnet 0 and RFC compliant, blah blah blah. If no mention, then exclude 0 and broadcast.