What is subnetting? why is it used?

Questions by vivekravindran

Showing Answers 1 - 11 of 11 Answers

A portion of a network that shares a common address component. On TCP/IP networks, subnets are defined as all devices whose IP Address have the same prefix. For example, all devices with IP addresses that start with 100.100.100. would be part of the same subnet. Dividing a network into subnets is useful for both security and performance reasons. IP networks are divided using a subnet mask

  Was this answer useful?  Yes

inder

  • Jan 17th, 2006
 

A portion of a network that shares a common address component. On TCP/IP networks, subnets are defined as all devices whose IP Address have the same prefix. For example, all devices with IP addresses that start with 100.100.100. would be part of the same subnet. Dividing a network into subnets is useful for both security and performance reasons. IP networks are divided using a subnet mask

  Was this answer useful?  Yes

radhey

  • May 6th, 2006
 

hi

give me a full deatle of subneting.if your a good man then you can give

abhijai

  • Jul 4th, 2006
 

Subnetting is a way to divide ur n/w in the best possible way so the ip add do not get wasted.

eg- a Class C n/w has 254 hosts but if ur n/w only needs 154 ip add ie 100 are wasted so u can divide that as per ur need. 

Rameshkumar Kaliamoorthi

  • Dec 4th, 2006
 

Allows the flow of ntw traffic b/w hoststo be segregate based on ntw config.. By organizing hosts into logical groups, subnetting can improve ntw security & performance.

  Was this answer useful?  Yes

babu1311

  • Apr 20th, 2009
 

Subnetting is the process of modifying of an IP network into smaller logical
IP networks , known as subnets. In this process the address space of a unicast
address prefix is divided to allocate the subnets of an organizational network
in such a way that only fewer possible addresses are wasted. Subnetting is
useful as it provides the following facilities:


1. Address flexibility: minimum loss of IP addresses
2. Broadcast containment, that is, smallest Broadcast domains: each subnet is a
different broadcast domain which reduces the collision.
3. Low level LAN security: Each subnet can be managed separately increasing the
security level.


To explain, a class B address prefixes support up to 60,000 hosts. But it is
technically impossible to make a single subnet for this 60,000 hosts. But with
subnetting, the space in that prefix address can be better used making different
subnets containing lower number of hosts without requiring router
reconfiguration.


For example, an IP address 172.65.0.0/16 contains first 16 bits as network
bits where as rest 16 bits as host bits. Among this 16 host bits first 8 host
bits can be used for subnetting for the newly created subnetted address prefix.


If 172.65.0.0/16 is subnetted as explained, separate subnets with their own
subnetted address prefixes can be created, each of the subnet containing 254
hosts as 172.65.1.0/24, 172.65.2.0/24, 172.65.3.0/24, 172.65.1.4/24, and so on.
The router can detect the separated subnetted address prefixes to forward the
packets to the appropriate subnet.


  Was this answer useful?  Yes

jyotishinde

  • Nov 19th, 2012
 

Subnetting means network divide into sub networks. It is used to reduce the network traffic or congestion.

  Was this answer useful?  Yes

rahul

  • Feb 8th, 2014
 

sub netting,divided the large network into small set of segment.

  Was this answer useful?  Yes

JFK

  • May 29th, 2014
 

Grouping of ip addresses, in case of consider a organization has been allocated with IP address 10.0.0.0 to 10.255.255.255 then, if the organization needs to separate the ip Address into groups for financial, developing, testing departments, it will use subletting which will divide a larger network into groups for the easier identification of the devices.

  Was this answer useful?  Yes

subramaniprasanna3@gmail.com

  • Jul 25th, 2015
 

Subnetting which divides the larger network
Advantage: Controls the traffic

  Was this answer useful?  Yes

anuj

  • Jul 14th, 2016
 

Achieving security with a complex network is risky. So subnetting is the process of dividing bigger network in smaller chunks. It helps in achieving security.

Performance is also improved because firstly we are searching complete routing table but now first a subnet will be find out than the host in the subnet.

Somehow it makes communication a complex process because firstly communication was a 3 step process but now it became a 4 step process.

  Was this answer useful?  Yes

usama jamil

  • Aug 10th, 2016
 

Subneting is used for dividing bigger networks into smaller chunks. Performance is improved and security is improved. Minimum loss of IP addresses.

  Was this answer useful?  Yes

Ashfaq

  • Apr 12th, 2018
 

Sub netting means dividing the large SINGLE network into many small networks . the main REASON to divide like this ..is to REDUCE or PROHIBIT DATA TRAFFIC during transfer.

  Was this answer useful?  Yes

Give your answer:

If you think the above answer is not correct, Please select a reason and add your answer below.

 

Related Answered Questions