Do you
love network traffic? Even I don’t, and no one else does. Would you like to
waste your limited resources? No one would like it. Today’s post is dealing
with better networking with Subnetting and classless Addressing.
Hi beloved readers. Subnetting is well known
networking process used almost every middle and big organization to manage and
design their network for best performance and error free.
What is Subnetting?
Subnetting is the process of dividing a big
network into smaller network. This process include inter domain classification
of the address on different subnet mask. Big network is having too many disadvantages.
Subnetting is great solution of all those big and small issues.
Why we
subnet?
There are lots of disadvantage of big/large
network, to overcome this Subnetting is done on these networks. Following are
closest reasons of Subnetting.
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Take
a Practical Scenario
Suppose you are having an organization with
1000 Computer in it. You can’t survive with a single Class C address as you
will have limit of 255 computers only.
You opt of using Class B address which can
have 65533 computers in it. So when you go inside it and opt a network, and
establish 1000 computer in it, 65533-1000= 64533 address will be of no use.
For the sake of wastage, your ISP no doubt provides you Class B address, but
rather it creates logical smaller address range for your organization which
may have 1000-1500 IP address.
In this way, company utilizes all the IP
address as well as delivers seamless data transmission.
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Reduce Network Traffic:
We all appreciate less traffic and congestion
free network. In absence of trusty router most of the packet keep grinding the
network and creates big traffic problems. With divided network and router, most
of the packets will reside in local network until the destination is another
network. So fewer packets will travel through router and router will be load
free.
Also router is responsible for creating
broadcast domain, smaller the broadcast domain we’ll have, less network traffic
and congestion we’ll encounter.
Optimized Network performance:
Less traffic and less congestion result in
greater and better network performance.
Simplified network management:
Being in smaller units, it would be far more
easy to isolate the networks and easily identify the exact position of error in
big gigantic network.
Great
for WANs:
Since WAN is being wider, it is slower and
more expansive than LANs. If one implement WAN in a single link, it would
create problems as listed above. Considering smaller network will make the
system more efficient.
Classless Inter-domain Routing
As mentioned above, this is methods adopted
by ISPs used to allocate the amount of address to a company, home user or say
medium or big area user. They provide address in certain block size after Subnetting
the one network.
One we receive such address, ISP provides us
address like 172.168.10.15/16. What does it means, slash notation (/)
tells us how many bits are turn on. It could be maximum 32 but we use
largest subnet mask to /30 as rest we reserve for broadcast and host bit.
Bottom line
Subnetting is clearly great tool by network
designer which still preventing the whole bunch of organization to utilize each
and every IP also not to forcefully move to IPv6 because of lack of IP. Along
with this, network management and performance is drastically increased for
every larger network.
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