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Questions tagged [subnet]

A subnetwork, or subnet, is a logically visible subdivision of an IP network. The practice of dividing a single network into two or more networks is called subnetting and the networks created are called subnetworks or subnets.

A subnetwork, or subnet, is a logically visible subdivision of an IP network. The practice of dividing a single network into two or more networks is called subnetting and the networks created are called subnetworks or subnets.

Subnetting provides a way to use the number of IPv4 addresses in an optimal way. The previous notation with classes caused a lot of IP's to remain. In the beginning this was not a problem, but these days IPv4 addresses have already depleted at the top level.

Source: wikipedia

Tutorial on subnetting

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Can a site contain domain controllers from multiple domains?

For e.g. I am creating a site with 2 clients and 1 DC in it. I am setting the subnet to cover these objects. So my site say SITE1 will have 2 clients and 1 DC. So when one of these clients tries to contact DC it will contact DC1 since it is the…
user2490241
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How to programmatically determine dynamic IP from behind a subnet

Sorry for the noob question, but I'm trying to hack together an ad hoc dynamic dns to reliably connect two machines in different geographic regions. My issue is every command I try (ifconfig, iwconfig, netstat, etc.) gives me the IP address from…
syzygy
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Why does Windoes not allow the subnet to be the same as the subnet mask?

In Windows, I can configure a network adapter like this: Ip Address: 192.0.0.1 Subnet Mask: 224.0.0.0 but not like this: Ip Address: 192.0.0.1 Subnet Mask: 192.0.0.0 Why? Why can't the subnetwork be the same as the subnetwork mask?
Chris
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Counting subnets

I'm reading about subnetting but have problems with these topologies. The book says that network1 has 4 subnets and network2 has 12 subnets. But I count only 11 subnets in netork2 ? If there is a switch between 2 routers, you have to count it only…
Yves Dejager
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How drastically can a public IP change?

On ISP level, is it commonly limited to some subnet mask? Is it possible or rare for an ISP to randomly change an IP's first 2 bytes? Just as a bit of backstory, I'm trying to deter users from connecting with multiple, drastically different IPs, if…
Whired
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Number of Subnets and total hosts

Possible Duplicate: How does Subnetting Work? Can someone please tell me what does this term means "A Class C network with 10 subnets" What exactly is 10 subnets? I know a subnet is something like 255.255.255.0 and in case of class C network it…
Dumbo
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subnetting question

Possible Duplicate: How does Subnetting Work? what is the last valid host on the subnetwork 192.168.176.200/30 and how did u get ur answer
jimi newman
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Hiding subnet from router

Lets say I have a network layout similar to this: What do I need in the ? node so that all of the PC's are not discoverable form the main network, but can access the main network/internet? I don't know if the "Main network" is a subnet in itself or…
Primemaster
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Can this two IP see each other?

I can't remember how networking worked. I need someone to help me with this, it may sound a bit stupid but I have to take care. This are the two IPs: 107.1.233.7/24 10.202.104.148/25 Simple question. Thank you
GBT55
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Identifying subnet bits of network addresses with same CIDR

Say we have network addresses 10.10.10.252/30 and 10.10.255.252/30 and 10.255.255.252/30. They all have CIDR of 30. I realize all three subnets have two usable hosts. All three addresses have subnet mask 255.255.255.252 but different number of…
Logan Lee
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Connect Router on Different Subnet

I see people genuinely helping out here but please stop with down-votes.I wouldn't have posted on server fault if this wasn't really a business problem.I am going to upgrade this network with a Failover WAN connection and separate the Home and Work…
Dushyant Deshwal
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How to configure subnets/VLANs to restrict access to WAN/other VLANs?

I manage the networking for our (very!) small church as a volunteer. Currently everything is set up on a single /24 IPv4 subnet. I'm wanting to break these out into VLANs for increased security, and also implement IPv6 at the same time. Our hardware…
ehbowen
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Dividing IP range among subnets

A company has been allocated all the IP addresses in the range 134.7.1.XXX, and needs to create three (3) subnets. The first subnet needs to be twice the size of the other 2 Is the answer simply: Subnet 1: 134.7.1.000 - 134.7.1.499 Subnet 2:…
Dawson
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How to efficiently subnet a network

I have base ip address 10.6.0.0/16. I need to divide this network into 12 subnets, and I need at least 80 computers in one network. Please explain how to calculate correctly subnets. I understand that subnets count should be power of two, so the…
cyeostoragrn
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Subnetting design for a new building?

A building with 4 floors, each floor is divided as follows; 15 users for accounting, 15 users for finance and 15 users for marketing (i.e 45 user in each floor). Data center is located on the ground floor, with 45 servers to be divided into 15 for…
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