A subnetwork, or subnet, is a logically visible subdivision of an IP network.

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Arch Linux device with static IP address, new router not finding the device

I have a device running Arch Linux on my network (Raspberry Pi to be exact) and I do not have a cable for the display. I typically used it by ssh client and had it configured for a static IP address ...
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28 views

IPv6 subnetting - coverting decimal to hexadecimal

I came across a question on IPv6 subnetting, You work as a branch network administrator of a large company with offices in many cities around the world. The corporate network is currently in ...
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2answers
31 views

Subnetting based on networking needs

I am unable to visualize the solution to the following question Your company has obtained the 131.107.168.0 /21 address space from an ISP. You now need to design this address space to accommodate the ...
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1answer
25 views

Is it possible to sniff packets on other subnetworks?

I've been reading about packet sniffing and was wondering if it's possible for someone to sniff packets on subnetworks other than the one they're on. Since the point of a subnetwork is that devices ...
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3answers
38 views

How come I can ping google but not a PC on a different subnet within my campus network?

I am a newbie to the networking world. I know that one cannot ping two PCs connected to different subnets unless you have a router in between. But, I was wondering how come I can ping www.google.com ...
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22 views

Relationship of routers to networks

I was wondering, in networking, what is the relationship of routers to networks? Can the same router be the gateway for 2+ networks? For example, if I have a wireless router at home, can I configure ...
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1answer
45 views

Windows Networking - Treat two subnets as one network

We have an existing (old) network (10.0.0.0/24) and we're trying to add another (new) subnet (20.0.0.0/24) using a Cisco 2901 router. I added the appropriate routes and tested everything out. We're ...
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2answers
64 views

Cannot reach the computer in WAN

I wanted to split the internet connection in my room. And my brother also wanted a better wifi accessability. So we bought a router (NETGEAR JWNR2010v5). All we wanted works great, good wifi. I have ...
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1answer
29 views

Active directory sites and services

I have 192.168.1.0/23 subnet for wired connection and 192.168.2.0/24 for wireless connection. Do I need to add 192.168.2.0 in AD Sites & services. Right now I have 192.168.1.0/24 added in the ...
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1answer
27 views

Double NAT with access to both gateway web interfaces

I have a Cisco Linksys E3000 home router that I appreciate. However, my new (but temporary) ISP will want me to use their Huawei router for their service once I get connected next week. This creates ...
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1answer
23 views

how the pc1 checks pc2 subnet

pc1 and pc2 are different subnets Actually if a pc1 wants to ping pc2 at first pc1 checks pc1 & pc2 subnets whether they equal or not if not the frame will not cross the nic of pc1 my question ...
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1answer
125 views

static IP outside of subnet range

I have two questions, but let me explain the situation first. They are about the (static) IP address of a printer attached to the network. We had this networking setup, using a normal consumer router ...
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3answers
128 views

Connecting 2 different subnet masks

I'm no network genius, but I have managed to get most things running. I get confused about subnets and gateways though. We have an office server connected to around 20 PC's that all communicate fine. ...
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1answer
245 views

Home network with two routers and just one Wifi

I know it is a pretty lame question, but I am not a pro in networking, so I will still ask it. And I will try to explain details where possible. I want to create the following setup: Phone line is ...
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0answers
18 views

Should we load smaller subnets into Active Directory

Our network team is splitting up the subnets in each of our offices from /16 and /18 subnets to multiple /24 subnets. Our systems team is not changing Active Directory sites and services to replicate ...
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1answer
55 views

Query site for given ip from AD sites and services

Windows Active Directory maintains a list of subnet to sites assignments (in "Active Directory - Sites and Services" -> Sites -> Subnets). The subnet-to-site associationas ar used, obviously, by ...
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2answers
62 views

How to find largest possible IPv4 network within specified range

Let's say, we are given a range of 192.168.101.64 - 192.168.102.128. What is the easiest way to find the largest possible IPv4 network within specified range, including network address, subnet mask ...
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2answers
57 views

Interview on network connections

I was on an interview for a web developer position and for some reason, in the test, there was a question about networks that sounded like this: Your PC ip address is (--something like--) ...
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1answer
33 views

Identify the TCP/IP classes respectively by beginning octets

I am busy studying for a network exam and I am stuck with this zinger: By studying the following beginning octets, identify the TCP/IP classes respectively 1-126 224-239 240-254 ...
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21 views

Add printer from different subnet

i.e My pc ip is 11.19.20.3 with gateway 11.19.20.1 I have a printer with ip 11.19.22.25 with gateway 11.19.22.1 How can I add this printer to my pc?
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636 views

How to setup two-way routing with Tomato Wireless Client mode (different subnets)

Currently I have a Netgear R7000 as my main router, with internet coming from a Moto Surfboard SB6141 Cable Modem. I have a Linksys E3000 running Toastman TomatoUSB connected to the R7000 as a ...
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1answer
100 views

How do I add subnets and VLANS into my network [closed]

First let me say I have posted this on cisco support forums and just copied and pasted into a new question for you here. Secondly I think I understand that to route through subnets I need a router ...
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2answers
124 views

Concise IP information in OS X Terminal

Is there a command for the OS X Terminal that shows you only the most vital IP configuration information about your machine? I know there is "ifconfig" but that brings up a bunch of (in most cases) ...
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1answer
57 views

Creating Subnet Mask [closed]

ive been set this task. given the network 140.50.0.0/16 Create a subnet mask for 400 subnets with the maximum possible number of hosts in each subnet. My question is how do i create a subnet mask?? ...
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2answers
479 views

How do I get a /23 subnet mask from 172.16.0.0 /21 network address?

I have 172.16.0.0 /21 My mask is 255.255.248.0 I have an IP range from 172.16.0.0 to 172.16.7.255 255.255.248.0 11111111.11111111.11111000.00000000 Network------------------------- ...
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130 views

LAN and WLAN networks under same IP range

I'm a newbie in network stuff and haven't enough knowledge to do what I'm wanting for now, so I need your help, please. I've two networks, a wired and another wireless. The wired one is between two ...
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61 views

Subnet mask for maximum number of hosts?

How would I configure a subnet mask for a maximum number of hosts on a network segment? For example, let's say I need a maximum of 6 hosts per network segment for a Class C address.
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50 views

Ways to differentiate between home and office private network

Let us consider there are two networks 1) home network and 2) office network. I have an application which will get the system IP and MAC Address of the installed machine while launching the ...
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2answers
83 views

2 routers, 2 subnets?

Firstly I will explain why I require this setup. I have bought an ASICMiner Cube for mining Bitcoin. It frequently stops mining until I reset it, which is quite troublesome. After reading the ...
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1answer
467 views

OpenWrt router acting just as a switch with another WAN from wifi client

I have here this networking problem I can't figure out. My situation is following: ADSL cable connection to WAN, provider's router/modem (some Zyxel), DHCP running, original firmware, not possible ...
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2answers
105 views

Determine the best subnet mask for the 172.29.0.0 network, with 30 subnets and 1,100 host on each subnet

This was a practice question I found online: Question: You are designing a subnet mask for the 172.29.0.0 network. You want 30 subnets with up to 1100 hosts on each subnet. What subnet mask ...
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1answer
55 views

When is the subnet mask used?

My NIC on my computer has a subnet mask. Is this only for it's own information? Or does the subnet mask get tossed into the TCP/IP headers to help the next device up route it? I'm guessing it's only ...
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4answers
570 views

Why my subnet mask is not matching with my IP address?

I have a class 'B' IP address 172.16.XXX.XXX in my machine. My Subnet mask is 255.255.255.XXX. I am studying networking now. So until now I didn't care about masking about all. But from Wikipedia I ...
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135 views

What is the first valid host on the subnetwork that the node 192.168.197.13 255.255.255.252 belongs to?

Does anyone have any ideas what the answer to this is? What is the first valid host on the subnetwork that the node 192.168.197.13 255.255.255.252 belongs to? I calculated the answer myself, but got ...
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1answer
2k views

Communication possible between 192.168.0.x and 192.168.1.x?

I have a problem I encounter on a regular basis. I have an access point with a fixed 192.168.0.x IP address. My network is 192.168.1.x. The problem is when I plug the access point into my network, it ...
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2answers
137 views

Devices on subnet cannot access each other but can access internet

I live in university halls and only have access to the internet and the network through one ethernet port. I have a TP-Link R860 router (wired only) and a TP-Link simple switch. If I connect using ...
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1answer
203 views

how do I setup my D-link DSR250n to use openvpn server

My aim is to make my Iphone connect remotely (and securely) to my home network and get from the DHCP (the d-link router) IP on the same subnet. This is because I have an client app that broadcasts on ...
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415 views

How do you route within an Amazon VPC subnet?

I have an Amazon Virtual Private Cloud that looks like this: 10.40.1.1 Internet Gateway 10.40.1.5 My OpenVPN Instance 10.40.1.100 My Windows Box What I want is traffic from the Windows box ...
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1answer
41 views

Remote network administration, solving 2 device 2 subnet merge

The problem: 1.) No Physical Access 2.) Very basic on site help 3.) Combining 2 subnets on 2 routers Now we know i cant go on site to move cords around so here are the current cord ...
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397 views

How to create a subnet at home with Linksys router

My home network consists of my ISPs router (Thompson TG585 v8) which is giving out both WIFI and Ethernet LAN connections on the 192.168.1.x range. The router's LAN address is 192.168.1.254. This ...
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56 views

routing table, ip address for outgoing packet

Network Destination Netmask Gateway Interface 0.0.0.0 0.0.0.0 192.168.2.1 192.168.2.8 ...
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274 views

Why nic with incorrect subnet mask can still ping the gate way?

At first, my network config was like this: $ ip a 2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 3c:97:0e:bd:b1:68 brd ff:ff:ff:ff:ff:ff ...
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1answer
75 views

How to Browse Machine on Sub-Network

How can I browse a machine on a sub-network? Our primary network addresses are at 192.168.1.x In our LAN we also have a little wireless Netgear router with some devices connected to it, which ...
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1answer
17 views

Sub net, 2^n or 2^n - 2?

To calculate how many bits I need to borrow when designing a subnet, is it 2^n = X or 2^n - 2 = X X being the number of subnets desired. I've found two websites each giving one of those ...
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2answers
402 views

Cisco Packet Tracer error “Invalid IP for this subnet mask entered”

im using cisco packet tracer configuring pc ip and this error came out "Invalid IP for this subnet mask entered"
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2answers
894 views

192.168.2.xy can't access 192.168.1.xy (: 255.255.255.0)

My goal is to access my NAS from a PC, but NAS is not reachable. Situation Here is my network configuration: Router 1: 192.168.2.1 : 255.255.255.0 Router 2: 192.168.1.1 : 255.255.255.0 NAS: ...
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101 views

What IP's should the servers be assigned? [closed]

I have got 4 subnets (calculated using online calculators) The major network is: 172.16.0.0/16 The students subnet having the highest IP requirement /22 mask gets 172.16.0.1 - 172.16.3.254 as ...
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789 views

Windows 7 can ping but can't see device on other subnet

I have 2 Windows 7 on 2 different subnets but 1 of them is unable to reach a NAS. The topology is as follow. Any idea why this is the case? Is there some Windows settings I need to apply? Subnet 1 ...
2
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1answer
587 views

How many subnets are needed?

I'm just starting out with networks. I'm trying to determine how many subnets are needed for this network: BRANCH1, BRANCH2 and HQ are routers. The Boxes between routers and PCs are switches. The ...
2
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3answers
302 views

Broadcast address in IPV4

I have a small network with the subnet mask 255.255.255.240 and the IP range is 192.168.2.1 - 192.168.2.12. From 192.168.2.1, I want to broadcast a packet. I don't want this packet to go anywhere ...