From: Jai Prakash (jpjsr06@gmail.com)
Date: Thu May 18 2006 - 22:44:03 ART
Hi Frog,
You can didvide the subnet in any kind of block as per your need.Whatever U
aksed, that is workable and you can use.
Regards,
Jai
On 5/19/06, Radioactive Frog <pbhatkoti@gmail.com> wrote:
>
> Hi Jaiprakash,
> thanks for answering to my query:
>
> Can't we subnet 192.168.1.0 to as below :
>
> a) first subnet 192.168.1.0/30 --> valid host 192.168.1.1 to
192.168.1.2broadcast IP
> 192.168.1.3
>
> b) Second subnet 192.168.1.4/27 --> valid host 192.168.1.5 to 192.168.1.34?
>
> and next subnet /28 and next subnet /30 ??????????
>
>
> OR
>
> It has to be either 192.168.1.0/26 or /27 or 38, I mean the whole subnet
> ?????
>
> REgards,
>
>
> Frog
>
>
> Ans of 2nd Qusetion ) Subnet mask for /25 will be 255.255.255.128 ( Here
> U can use 2
> valid Network subnets with 126 valid host
> IPs in each subnet)
> Subnet mask for /26 will be
> 255.255.255.192 ( Here U can use 4
> valid Network subnets with 62 valid
> host IPs in each subnet)
> Subnet mask for /27 will be
> 255.255.255.224 (Here U can use 8
> valid Network subnets with 30 valid host
> IPs in each subnet)
>
>
>
>
> On 5/19/06, Jai Prakash <jpjsr06@gmail.com> wrote:
> >
> > Hi Frog
> >
> > As per my understanding, when u take calss C as a major network and
> > divides into subnets, it takes all available subnets with valid hosts.
> >
> > In your case, if you divide 192.168.1.0/24 into subnets of 30 block host
> > IP.........you will get 8 valid subnet blocks with each having 30 valid
> > hosts IP. You can use any subnet from these 8 subnets block.
> >
> > The theory says.....don't use 1st IP and the Last IP of the subnets
> > because, they represent Network IP and Broadcast IP accordangliy for that
> > particular subnet.I never seen that books says don't use 1st subnet and
> > last subnet, when you divide Major Network into subnets.
> >
> > The whole discussion outcome is :
> >
> > Ans of 1st Qusetion ) U can use 1st and Last subnet of Major Network
> >
> > Ans of 2nd Qusetion ) Subnet mask for /25 will be 255.255.255.128 (
> > Here U can use 2
> > valid Network subnets with 126 valid
> > host IPs in each subnet)
> > Subnet mask for /26 will be
> > 255.255.255.192 ( Here U can use 4
> > valid Network subnets with 62 valid
> > host IPs in each subnet)
> > Subnet mask for /27 will be
> > 255.255.255.224 (Here U can use 8
> > valid Network subnets with 30 valid
> > host IPs in each subnet)
> >
> > Correct me , if I m wrong................
> >
> > Best Regards,
> > Jai
> >
> >
> >
> > On 5/18/06, Radioactive Frog <pbhatkoti@gmail.com > wrote:
> > >
> > > Hi Guys,
> > >
> > > Very basic question but lots of doubt.
> > >
> > > 1) First question:
> > >
> > > If class C subnet 192.168.1.0 is routed to ISP-B (small) by ISP-A (BIG
> > > ISP).
> > > When ISP B starts subneting the 192.168.1.0 IP block for different
> > > customer
> > > why do he starts distributing from the first subnet from
> > > 192.168.1.0/24
> > > (which sholdn't be used)???????????
> > > The books and theory says first and last subnet shouldn't be used (as
> > > network and broadcast subnets), hence we shouldn't use the
> > > 192.168.1.0/24(first <http://192.168.1.0/24%28first> subnet)
> > >
> > > Means the ISP should start distributing from second subnets e.g.
> > > 192.168.1.32 (see below).
> > >
> > > ---------------------------------------------------------
> > > Subnet , Valid Hosts , Broadcast
> > > 192.168.1.0 , 192.168.1.1 to 192.168.1.30 ,
> > > 192.168.1.31
> > > 192.168.1.32 , 192.168.1.33 to 192.168.1.62 , 192.168.1.63
> > > 192.168.1.64 , 192.168.1.65 to 192.168.1.94 , 192.168.1.95
> > > 192.168.1.96 , 192.168.1.97 to 192.168.1.126 , 192.168.1.127
> > >
> > > 192.168.1.128 , 192.168.1.129 to 192.168.1.158 ,
> > > 192.168.1.159
> > > 192.168.1.160 , 192.168.1.161 to 192.168.1.190 ,
> > > 192.168.1.191
> > > 192.168.1.192 , 192.168.1.193 to 192.168.1.222 ,
> > > 192.168.1.223
> > > 192.168.1.224 , 192.168.1.225 to 192.168.1.254 ,
> > > 192.168.1.255
> > >
> > >
> > >
> > > 1) Second question:
> > >
> > > What if ISP starts distributing /25 /26 /27 IP blocks from
> > > 192.168.1.0/24 IP
> > > block to the customers ? In this case what subnet mask shouldn't be
> > > used
> > > (still first and the last in 192.168.1.0/24 blocks) ?
> > >
> > > Appreciate your answers to this basic topic!
> > >
> > > Frog!
> > >
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Thu Jun 01 2006 - 06:33:21 ART