Questions tagged [subnet]
Questions relating to IP subnetting, including planning, calculation and best practices.
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1answer
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Is this computer a threat? On same network range, but in a workgroup
We have a normal on-premise Class C network with an internal IP address scheme of 192.168.15.x (hypothetical). We have a SonicWALL device that acts as a VPN server for external clients, a DHCP server ...
0
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0answers
18 views
Confused in the concept of subnetting [duplicate]
I am doing sub netting and want to confirm that if my method is correct or not. Suppose we are to design a network that has 2 departments. Department 1 has 32 number of hosts and department 2 has 64 ...
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0answers
12 views
Subnetting related questions [on hold]
Coming up next week i have an examination on Networks.Having said that,crossing past papers i came upon this exercise(Picture).Most of the questions iv solved do not have this format so im kinda ...
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2answers
30 views
Connection between two networks with different IPs and identical subnets?
How can we establish communication between two networks with different IPs but same Subnets?
Network Connection 1: (Factory Network for machinery)
I.P = 192.168.19.X
S.N = 255.255.255.0
G.W = 0.0.0.0
...
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0answers
16 views
Splitting into 4 subnets [duplicate]
I am trying to attempt a past exam question. The question is as follows,
Consider a router that interconnects four subnets: Subnet 1, Subnet
2, Subnet 3 and Subnet 4. Suppose all of the interfaces ...
1
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0answers
42 views
Routes stopped redistributing through OSPF
I was entering a number of secondary addresses on some VLANs. In total there were 10 secondary addresses added.
The subnets added were from three publically routable /24s (I will call them 25.0/24, ...
0
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0answers
36 views
How to route a specific users IP from WAN to a specific host IP on a subnet OPT1 (pfsense)
I host a game server, Players and Devs use the same launcher/client that has hard coded ports (5555) that cannot be changed. (No Configuration Files) How would I route Devs to the Development Server [...
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0answers
13 views
How to get subnets given the IP Address [duplicate]
I just started learning networking and came across this question hope some of you can help me
An organisation has been given a block of IP addresses in the form 128.119.64.40/20.
The organisation now ...
1
vote
1answer
30 views
How to tell apart the type of the mask(subnet-supernet-net mask)
Say we have the the IP address 10.2.8.230/24
Anyone could say the following:
It just represents a normal network:10.2.8.0/24
Or it is a subnet because normally this IP address is in the class A ...
0
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0answers
21 views
Subnet an IP addres to 4 equal subnets [duplicate]
If a subnet address is given as 192.168.10.0/25
How can i subnet the network into four equally sized networks and give the new network addresses along with the subnet mask and state the number of ...
0
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0answers
12 views
Host address not host range? [duplicate]
can someone explain to me how to get the host address? I understand how to get the subnet answer but not the host address, and majority of the google searches / videos always give me the host answer ...
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0answers
14 views
Network ID(Name) in subnetting? [duplicate]
So when we wanna subnet the network of 8 hosts
we will say for 8 different addresses we need 8+1(wasted broadcast address)=9
and there is this many different 2^4=16 states we have which needs 4 bits! ...
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0answers
12 views
VLSM HW Question [duplicate]
--- PROMPT ---
Assign network addresses to each of 6 subnets, with the following constraints. All addresses must be allocated from 214.97.254/23;
subnet A should have enough addresses to support 250 ...
0
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0answers
28 views
Subnetting - IP Address Classes [duplicate]
I've been trying to get my head around subnetting but seems to be getting confusing with the classes and IP ranges within that class.
Example:
IP Decimal:10.2.225.234/22
IP Binary:00001010 00000010 ...
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4answers
118 views
Why do Vlans need routers to communicate?
Why do devices on two separate VLANs (Virtual LANs) implemented on the same switch require a router to communicate?
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0answers
27 views
Question about subnetting [duplicate]
If i have a network 172.16.100.0 /22,
How can i subnet in in order to have
2 networks of 32 IP addresses
5 networks of 64 IP addresses
3 networks of 128 IP addresses
1 networks of 256 IP ...
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0answers
8 views
Given an IP address and a subet mask, how do I find the max number of subnets and usable host IP's? [duplicate]
my question is based on an IP address and a subnet, how can I find the maximum number of subnets and the number of usable host IP address per subnet. This is all IPv4 if that helps.
For example if I ...
22
votes
8answers
4k views
Why can't devices on different VLANs, but on the same subnet, communicate?
I have a question about switching. I have two devices connected to a switch with IP addresses 192.168.5.20 and 192.168.5.10. Both devices have the same prefix, /24. That means they are on the same ...
0
votes
1answer
45 views
Confused about subnet masking [duplicate]
I've been reading up on CIDR and subnet masking and I am having a hard time figuring it out.
I stumbled upon this question, and even though I have the solution I cannot figure it out.
Consider a ...
3
votes
3answers
429 views
Do VLANs within a subnet need to have their own subnet for router on a stick?
I have been creating a network lab in packet tracer for practice. I have 3 vlans in subnet A and I am trying to configure router on a stick at gig6/0 on the bottom left of the image. Do I need to ...
2
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1answer
41 views
Cisco ASA 5505- My subnet mask is different from Show Route
While I was troubleshooting a DNS issue on my 10.10.10.0/30 subnet, I noticed the Local (L) and Connected (C) has different values. I configured the 10.10.10.0 network to use 255.255.255.252 has the ...
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0answers
12 views
Subnetting help [duplicate]
I am sorry if this is a simple question, but I am a little overwhelmed and I can't seem to grasp what I need to do. Long story short, I took over a network that was poorly designed in my opinion, but ...
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0answers
20 views
Unable to calculate for subnet mask [duplicate]
My question is - To divide a class C network into a maximum of 14 subnets each capable of having up to 14 hosts, the subnet mask used should be .. what and how ?
1
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1answer
37 views
Help with network setup [closed]
I have the following situation:
Router 2 is a given. It is used by several people to go on the internet ('People we don't trust').
We are a tiny company that is supposed to go on the internet ...
5
votes
2answers
762 views
Does IPv6 have similar concept of network mask?
Does IPv6 have similar concept of network mask?
How does it represent a network?
In the output of ifconfig, does prefixlen 128 represent a network mask?
lo: flags=73<UP,LOOPBACK,RUNNING> mtu ...
0
votes
0answers
13 views
determine the Network class [duplicate]
how can I determine The Network class from only subnetmask ,,without Network address
EX: 255.255.0.0 /16 written in my book it belongs to class A .How they knew it?
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0answers
11 views
Doubt on Subnetting [duplicate]
I have a doubt when I was trying to expend the network segment sizes. I wanted expend 192.168.1.208 to /27 and the following block to /28.
I don’t want to disturb the segment before 192.168.1.208 ...
7
votes
2answers
2k views
What is IP squat space
I came across this article and I'm trying to understand what is going on here, I found some packets on my network containing 22.0.0.0/8 and 29.0.0.0/8 IP range and It's based on:
https://en.wikipedia....
3
votes
1answer
61 views
Host IP address vs gateway IP address vs DHCP IP address
What is the difference between a host IP address, a gateway IP address, and a DHCP IP address when setting up networking devices?
For example, when configuring a virtual network adapter for my VM, I ...
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votes
1answer
73 views
Determine how many bits to borrow [duplicate]
I apologize if this is a too simple question for the people here, but this is my problem:
I am tasked to determine the subnetmask (binary), subnet mask (decimal) and the Prefix notation for a set ...
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0answers
15 views
Trouble understanding CIDR allocation [duplicate]
I am currently learning about CIDR allocations. Given the following problem:
Given a network of IPs starting with 212.201. 3 companies request 16.000, 2.000 and 29.000 IP addresses.
the problem ...
2
votes
0answers
35 views
Question about creating Subnets for a large amount of sites that will make a site-site tunnel to our datacenter [closed]
Our data center network is:
10.20.44.X/24
I want to have our sites use 10.X.X.X/24 (Site Number, VLAN, host)
EG:
Site 30
10.30.10.X/24 10.30.20.X/24
10.X would be corporate network 20.X would be ...
2
votes
1answer
25 views
How to convert size represented in one prefix length to another?
Example, let's say if someone says, I have allocated one /64 address. How can I convert that to a size in /30? How many /30 equals to one /64?
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0answers
36 views
Subnetting different ip on same networks with different mask
I am a little confused with subnetting. Looking for a proper explanation.
Suppose I have 3 routers A, B and C.
Int 1: 10.0.0.1/30 <-- Router A
Int 1: 10.0.0.2/30 <-- Router B
Int 2: 10.0.0....
3
votes
1answer
132 views
Juniper SRX320 Dynamic VPN, cannot route to Remote-Protected-Resource
Multiple VPNs setup with a Juniper SRX320.
The SRX320 has an irb interface as follows:
irb {
unit 0 {
family inet {
address 192.168.120.1/24;
}
}
}
I've setup ...
0
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0answers
15 views
Is there currently a formula for calculating the network ID when you know the amount of networks used? [duplicate]
edit: I wanted to mention the reason I am asking is because I have scoured the internet to find a formula similar
I figured a formula and wanted to know if such a formula is was already in use.
(...
0
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0answers
14 views
Subnetting babysteps - find networks [duplicate]
I hope the question title is correct :S For example i get the subnet 80.109.0.0 255.255.0.0 and want to make 8 subnets.
subnet mask in binary is
11111111.11111111.00000000.00000000
if i take 3 bits ...
19
votes
2answers
5k views
What is the difference between 0.0.0.0 and a loopback IP address?
From the book Computer Network:
The IP address 0.0.0.0, the lowest address, is used by hosts when they
are being booted. It means ‘‘this network’’ or ‘‘this host.’’
... All addresses of the ...
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votes
1answer
42 views
Network IP questions [duplicate]
Suppose I have a network with IP address 192.168.10.1/16.
This network can hold up to 65536 machines, from 192.168.0.0 up to 192.168.255.255 (65534 machines without the network ID and broadcast ...
0
votes
2answers
51 views
Accessing computers from different subnets with Dell Layer 2 switches possible?
I have two separate networks, a 192.168.20.x and a 192.168.80.x each on their own Dell X1026 Switch in Layer 2 mode. I would like the ability to access shares, ping, etc from computers on the .20.x ...
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votes
1answer
59 views
Is the following IP address and Subnet configuration valid for an internet host? [duplicate]
IP: 218.50.10.5
Subnet: 255.255.255.240
Can you tell me how to calculate it?
Edit:
I have entered Yes to all of these but I believe I am wrong on the last one but I can't figure out how I am wrong.
0
votes
2answers
58 views
Switch virtual interface
Single SVI can be mapped to a VLAN. When configuring VLAN on SVI, are there any fix no of subnets can be assigned to a single VLAN?
maximum number of VLANs can be configured on the switch =4094
...
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2answers
170 views
Is IP address starting with 115. public or private?
I have one device with ip address 115.124.114.111. I want to know if IP address starting with 115. public or private?
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2answers
46 views
Make devices visible under Access Point
In our network, all wired PCs have a direct access to internet (83.XX.XX.XX) and a secondary IP address on the same NIC in order to access a subnetwork (192.168.10.XX) with wired peripherals (scanners,...
2
votes
2answers
200 views
Subnetting-Supernetting and Classful-Classless routing
1) Subnetting and Supernetting can both be done for private and public IP addresses?
2) Classful addresses weren't successful because of IP wasting, and that is why the 'network mask' was invented, ...
0
votes
1answer
52 views
IPv6 variables or other methods of shortening
From the dawn of when I heard about IPv6 many years ago, to my continued hesitance to make good use of it in today's world where it's eventually going to become necessary... my biggest issue I think ...
1
vote
2answers
108 views
Changing subnet mask
Currently I have a 10.10.10.0/24 network and am running out of IP Addresses. I'm not sure if I change to /22 mask, if I will still be able to communicate with some of the other facilities where we use ...
0
votes
2answers
62 views
Creating a network for three separate businesses in one building
What would be best practice in terms of creating a network to satisfy three separate businesses located in one building?
The building in question has three floors, each floor has 25 workstations and ...
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1answer
34 views
Find Major network vslm
Im a bit lost with this question. In order to get proceed with the vslm i need to find the Major network of this subnet 121.118.40.0 /19.
For me the major network is 121.118.32.0/19, but when I run ...
1
vote
1answer
58 views
Finding the network address for given host IP?
Answer provides the procedure to find the network address when a packet with destination IP(198.51.100.223/21) is reached at a router.
But a network packet has the destination IP 198.51.100.223 in ...
