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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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What if my public address is same as one of the IP address in my AWS VPC CIDR Block?

My public IP address (of my personal computer) from which I access the internet ranges from 112.110.x.x. For experiment, I created a VPC in AWS and chose the CIDR block as 112.110.0.0/16. In the route table, destination IP 112.110.0.0/16 has a…
Sanjay Vig
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Ubuntu subnet distribution

I´ve a question regarding the distribution of subnets within my linux system or more specifically ubuntu. If I set a ip-adresse with a netmask, how will ubuntu set the netaddress and broadaddress of this specificy subnet. First example: I´m adding…
Noob
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What significance does the subnet mask have for a public IP address?

Our hoster has assigned us multiple public IP addresses. They are individual non-contiguous addresses e.g. 1.1.1.50 and 1.1.1.222. According to them the correct subnet mask to use is 255.255.255.0. I do not understand why that is. My understanding…
boot4life
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Network hierarchy with subnets

Is it possible to divide networks with subnets so that they intersect? My example is: Network A: only visible inside network A Network B: only visible inside network B Network C: visible from both networks? Can this be achieved with subnets or do…
kabauter
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Cannot ping DNS servers

I'm in abit of a situation, here is what I'm up against: So I have two server, on different subnets. Both servers can ping each other. Server one 10.0.1.* Server two 192.168.2.* Server one can ping the DNS servers without any issues Server two…
Storminator
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Separate subnet with exceptions

I have a network with clients in the 192.168.30.x range and clients in the 192.168.40.x range. both are in a 255.255.0.0 subnet. All clients with .30.x are connected to one switch and all clients with .40.x connected to another switch and both…
Garog
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Should I break into subnets

I am a working on designing a network for a new volunteer ambulance headquarters. I am trying to decide if I should use Sub nets and how to group them. As of now the network load is going to be made up of, 36 IP based security cameras, around 20 ip…
chris
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can two nic have same subnet but different network?

Business case: A computer has eth0 and eth1 and eth0 address is 192.168.1.2 (static). The eth0 is used by a configuration software to configure the address of eth1 in the field. eth0 is only for this purpose. PC ---- [eth0 Linux Computer …
Splash
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Allow communication between two networks

+--------------------------+ +--------------------------+ | Office A | | Office B | | Technicolor TG784n v3 | | (router model not known | | 192.168.1.1…
Frankie
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Ping PC in Different Subnet / Network

I am new to practical aspects of networking. So what I was trying is to ping two PC which are connected to two (wireless) routers which are taking internet through LAN. So Router 1 IP : 10.100.98.25 PC 1 IP : 192.168.1.1 Router 2 IP :…
Anup
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What's the difference between .0/32 and .1/24 in CIDR?

We're specifying CIDR addresses in AWS rules, and I came across something I don't understand. /32 means one single address. So 10.0.0.0/32 means only the single address 10.0.0.0. But an address ending in .0 is a broadcast address, right? So in…
pabo
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Online tool to calculate IP mask

I know there are so many tools to calculate a network range starting from an IP and its mask (192.168.1.0/24) but do you know an online tool to calculate the mask starting from first and last IP available? For example I have these IPs and nothing…
michelem
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Could I have 2 nat on vpc

There is a vpc on amazon that has two subnets. The outer one has internet access and the inner one using NAT server to connect to internet. Inner subnet have plenty of servers for development and testing. Now I need to use separated NAT server for…
Bagi
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Are smaller subnets more efficient (when routing to/from)?

Say I have 4 IPs in a subnet. Scenario 1 (/24): Client A: 10.0.0.1/24 Client B: 10.0.0.2/24 Client C: 10.0.0.3/24 Client D: 10.0.0.4/24 Scenario 2 (/16): Client A: 10.0.1.1/16 Client B: 10.0.2.1/16 Client C: 10.0.3.1/16 Client D:…
korylprince
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Merge three DNS Servers into one

The situation is as follows: Currently three DNS servers are separated from each other, these are to be merged into one. The goal is to have only one DNS server that handles all requests of the three domains. The problem is that we can not access…
user3161212
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