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Questions tagged [subnet]

A part of the IP address identifying the whole local network (high bits as defined by netmask). The remainder of the IP address (host id) identifies devices that are connected to this network. Can also mean the local network itself, if addressed by IP address in a described way.

Read more on wikipedia: https://en.wikipedia.org/wiki/Subnetwork

893 questions
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Networking IPv4 exercise

I’m starting to learn about networking. It would be really helpful a bit of help with this exercise and some explanations, cause I’m really stuck. This is the network topology from the exercise: We know about it: AP1, AP2 and AP3 work as bridges…
Micu
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nftables - IPv6 port knocking - accept whole subnet

I'd like to add port knocking to a server which is already working. My client sends the magic sequence of packets and the server will add it to a nftables set of allowed clients for specific time. Therefor the clients are allowed to use some…
bago
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How to allocate/generate new IP address in ec2 instance in same subnet range?

I know I can get new IP address by going to Elastic IPs --> Allocate new address but by doing this I always get IPs in different subnet range. I want to IPs with same subnet. I have two ec2 instance, Actually I want a 2 new IP address with in same…
programmer
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How EC2 allow SSH tunelling to access RDS in private subnet?

To access RDS in private subnet, in the below architecture, Giving public IP of EC2, ssh private key location of EC2 in public subnet, DB credentials of RDS in private subnet, as shown below, How EC2(in public subnet) allow ssh tunneling to RDS in…
overexchange
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How to decide Address range?

Screenshot of error I am trying to make Virtual network on azure cloud, I tried giving Address space 255.255.255.0/24 , which i think means is that first 24 bits are reserved. I want to know what can be the address range which can be given to my…
paresh494
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How to validate IPV6 network prefix in javascript

I am trying to validate certain IPV6 network prefix to create a subnet. I am unable to validate the network prefix using JavaScript regular expression. Can anyone help. Format of some network prefix as below 2001:0000:1234:0000…
MANOJ
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Divide ip network into 4 subnets

I've got a task: Divide the IP network 150.200.0.0 with the network mask of 255.255.0.0(/16) into 4 subnets. I need to fill up a table, I googled it and filled it up like this, not sure if it is correct or not. Can you help me with…
Nikita
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Azure subnets for cloned Dev, Test, Product with common web server

I have 3 VMs (app, content, DB) that are part of an application deployment. I need to clone multiple copies of this VM set. There is a common web server for all sets that proxies requests to the app server in each set. Because hostnames are…
ts488513
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How can I find subnet mask given a network ID

How can I figure out what the subnet mask is supposed to be given a network ID? Network ID: 210.107.189.0 Subnets required: 2 I am trying to study for the Network+ certification and was looking into subnetting practice found…
SkylarPurifoy
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Class C (/24) networks in a /21 network

How many equivalent Class C (/24) networks are there in a /21 network? How do we calculate it? I have checked different websites but without success.
John Cheva
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Calculate subnet with few unused addresses

You need to create a new IPv4 subnet on the network. The subnet must support a maximum of 5,000 hosts and must have as few unused addresses as possible.How would you configure DHCP to support this subnet? A. You should use a subnet mask of…
B P
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Subnet plan with efficient use of a range of ip adresses

Good morning, so basically I am working with Packet Tracer atm and have 3 subnet plans assigned(management(104users), staff(43 users) and admin(35 users)). I have an ip address range of:38.191.0.0 and subnet mask of 255.255.255.0. I want to produce…
JGuerra
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What IP's are in this IP block and how to use them?

I am very new to this IP block thing so please excuse any "nooby" mistakes. I just purchased a dedicated server and in my control panel it says: IPv4 Assignment #1: 192.151.150.194/29 Does this mean the following IP addresses are usable?…
faraaz
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Wildcard mask and Subnet mask

Im trying to understand wild card masks, here's an example of what I'm trying to do IP ADDRESS: 192.168.1.1 = 11000000.10101000.00000001.00000001 WILDCARD : 0.0.0.0 = 00000000.00000000.00000000.00000000 Result : 192.168.1.1 =…
Patrick
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Find subnet mask from IP

In my LAN, I have two subnet masks: 255.255.255.0 255.255.255.128 Is there a method to scan all LAN's IP to know in which subnet mask they are?
CarloM_dtb
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