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Subnetting Question [number of networks]
16 years 8 months ago #25850
by kogula14
Subnetting Question [number of networks] was created by kogula14
Hi,
I have question in subnetting.
Question: How many subnetworks and hosts are available per subnet if you apply a /28 mask to the 210.10.2.0 class C network?
Well is it the answer is [16 networks and 14 hosts]??
I need to clear my doubt because the answer for this question according to actualtest.com is [14 networks and 14 hosts]!!
Which one is correct? 14 or 16 network??
Please help me.
Thanks[/img]
I have question in subnetting.
Question: How many subnetworks and hosts are available per subnet if you apply a /28 mask to the 210.10.2.0 class C network?
Well is it the answer is [16 networks and 14 hosts]??
I need to clear my doubt because the answer for this question according to actualtest.com is [14 networks and 14 hosts]!!
Which one is correct? 14 or 16 network??
Please help me.
Thanks[/img]
16 years 8 months ago #25851
by Smurf
Wayne Murphy
Firewall.cx Team Member
www.firewall.cx
Now working for a Security Company called Sec-1 Ltd in the UK, for any
Penetration Testing work visit www.sec-1.com or PM me for details.
Replied by Smurf on topic Re: Subnetting Question [number of networks]
Old school, the same rule applies for networks as it does hosts, i.e 2^x-2 (x is bits)
Most hardware now allow the lower & upper (all 0's & all 1's) bits so it does work. The key is MOST. I have never come across them not being able to be used. Cisco devices have a command to turn this on (IP Subnet-Zero), this basically allows the additional range to be used.
Cheers
Most hardware now allow the lower & upper (all 0's & all 1's) bits so it does work. The key is MOST. I have never come across them not being able to be used. Cisco devices have a command to turn this on (IP Subnet-Zero), this basically allows the additional range to be used.
Cheers
Wayne Murphy
Firewall.cx Team Member
www.firewall.cx
Now working for a Security Company called Sec-1 Ltd in the UK, for any
Penetration Testing work visit www.sec-1.com or PM me for details.
16 years 8 months ago #25854
by S0lo
Studying CCNP...
Ammar Muqaddas
Forum Moderator
www.firewall.cx
Replied by S0lo on topic Re: Subnetting Question [number of networks]
And thats just an example of the difference between cisco exams and the real world. In such cases, you have a "correct answer" and a "cisco answer". Use the cisco one only in your exams
Studying CCNP...
Ammar Muqaddas
Forum Moderator
www.firewall.cx
16 years 8 months ago #25857
by Chojin
CCNA / CCNP / CCNA - Security / CCIP / Prince2 / Checkpoint CCSA
Replied by Chojin on topic Re: Subnetting Question [number of networks]
cisco also counts Gateway as host.. so therefor I think Cisco's type of answer isn't any different from the real world.. or am I forgetting something ?!
CCNA / CCNP / CCNA - Security / CCIP / Prince2 / Checkpoint CCSA
16 years 7 months ago #25871
by kogula14
Replied by kogula14 on topic Re: Subnetting Question [number of networks]
alrite. thanks for all of u guys. Now im clear and will use old school formula 2^x-2, x=bit
Thanks guys!
Thanks guys!
16 years 7 months ago #25872
by Smurf
Gateway address is a valid host address ? It doesn't distinguish between what a host is, its just valid addresses within a subnet range.
Wayne Murphy
Firewall.cx Team Member
www.firewall.cx
Now working for a Security Company called Sec-1 Ltd in the UK, for any
Penetration Testing work visit www.sec-1.com or PM me for details.
Replied by Smurf on topic Re: Subnetting Question [number of networks]
cisco also counts Gateway as host.. so therefor I think Cisco's type of answer isn't any different from the real world.. or am I forgetting something ?!
Gateway address is a valid host address ? It doesn't distinguish between what a host is, its just valid addresses within a subnet range.
Wayne Murphy
Firewall.cx Team Member
www.firewall.cx
Now working for a Security Company called Sec-1 Ltd in the UK, for any
Penetration Testing work visit www.sec-1.com or PM me for details.
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