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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

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Best way to add support for a new subnet

I currently have a network where all of the clients are served 192.168.0.0 subnet addresses with a subnet mask of 255.255.255.0. Since I am running out of addresses to serve within that subnet, I would like clients to start being served 192.168.4.0…
TreHoffman
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Number of Networks

If I will have this Class A Subnet Class A: Default Subnet Mask : 255.0.0.0 Host per network : 16,777,214 Number of networks : 128 How can I find the number of Networks? (I mean the number 128 above) I can find the host per network by using :…
Jumong
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5th net of private class B when SM is 16?

I need to calculate a network with VLSM. It says I should start with the 5th net of private class B when subnet mask is 16. What is this 5th net? The network looks like this:…
Exceen
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Icmp subnet address request

I'm trying to understand how i can get a subnet address using ICMP. In the Wikipedia (other sources as well), there is a message example, but all I was able to find has nothing to do with this message. Tried to use IcmpSendEcho (from msdn example),…
Shushuka
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Subnetting how many networks can be contained

Ok so I have a submitting question I know the answer too but don't know why it is the right answer: How many /16 networks can be contained in a /8 network? The answer is 2^(8), but why? What math is done to figure that out? Any help is appreciated…
David Baez
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connecting two routers via serial cards

on my current router cisco 2811 i have two subnets /30(fe0) and /27(fe1) ...i want to add /25 but i am told i need an external card: Cisco 2-Port Fast Ethernet Layer 3 HWIC. since thats very expensive i have another cisco 2811 i can use. i am…
bit_punk
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sub-netting for 62 hosts only gives me 3 usable networks?

I use the following table to workout the required subnet mask for my network of 62 hosts which is 255.255.255.192 which according to the table gives me 4 use-able networks. In this case the first network address is 192.168.1.64 with a range of…
crmepham
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AWS Public WebServers to NOT directly reachable from Outside by their IPs?

Since i'm totally not a Network Admin, i have no idea how to design it or even possible or not. I'm using AWS and EC2 instances. But now for some security reasons, i am told to use VPC and Private Subnets. I don't have knowledge good enough but…
夏期劇場
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List of networks contains other networks?

I have two lists. One list with networks (e.g. 10.0.0.0/8 etc.) and a second list with subnets (e.g. 10.10.1.0/24 or /27 /28 etc.). I would like to figure out, which of the subnets fit in the first 'container'-network (using perl). Any ideas?
Stef
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SonicWall VPN tunnel is up, but no traffic allowed. Where to begin troubleshooting?

I'm have a tunnel between a SonicWall NSA2400 (corp office) and a TZ215W (branch). The VPN link shows to be up, however, traffic counter stays at 0 and I can't ping to the remote network. It's a site-to-site setup: -corp office: --IKE…
David
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Why host on different network connected to a switch are able to ping?

Hello Guys am a beginner, I have two routers connected to a switch R1 fa0/0 config - 10.1.1.1 255.255.255.0 R2 fa0/0 config - 20.1.1.1 255.255.255.0 both are configured as a host by "no ip routing" and the fa0/0 interface of the router is…
user2911287
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Bash Shell script to calculate an address in a subnet

This is a difficult one to extrapolate what I need, so bear with me. Let's say we have this subnet 10.4.x.0/28 which iterates itself across multiple subnets that look the same, i.e 10.4.0.0/28 10.4.0.16/28 10.4.0.32/28 etc... and we have a single…
dobbs
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Subnetting to split network into smaller networks

I've been working on this problem but haven't made much progress. Could someone help me out? Your company is assigned the network address 214.56.78.0/24. The company has five work groups to support: Administration (11 hosts), Sales (32 hosts),…
user2787223
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Routing/Subnetting issues

I am an absolute newb when it comes to networking. I have one router (I think they're technically a router/switch combo) who connects directly to the internet, and both my laptop and another router (again might be a combo) connect to it wireless.…
Pieter-Jan
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Multiple VLANs in the same subnet

Is it possible to have multiple VLANs in the same subnet, with the same gateway address (TMG). note that I don't want them to connect to each other, so ARP/inter-vlan routing (within the subnet) is not required. I want to avoid having many Subnets…
A.J.
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