Questions tagged [subnet]

Questions relating to IP subnetting, including planning, calculation and best practices.

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187 views

How do VLSMs work? [closed]

I recently came across a question which I don't know is a genuine one and the question was, Which of the following options are examples of VLSM? A. Subnetting 192.168.1.0/27 into multiple /30s B. ...
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1answer
1k views

Discontiguous Addresses in IP Subnets

What are the reasons for using only contiguous addresses in subnets? Will something malfunction if we use dis contiguous IP addresses? I am aware that RIP and IGRP will auto-summarize which results ...
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1answer
913 views

Subnetting - Reason for maximum number of subnets [duplicate]

I'm new to networks and I was watching this video on Cybrary on Subnetting. The example h explained goes like this: Q. Subnetting 192.168.1.10/27 with subnet mask 255.255.255.0 He said 24 bits are ...
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1answer
233 views

Calculating Netmask address in specified range [duplicate]

how can I find Net mask address in the rage: 192.16.128.0 to 192.16.135.255 Note: I want to use Classless Inter-Domain Routing so net mask should not be multiple of 8. what should we calculate it for ...
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1answer
80 views

Why is devices on Subnet 2 (Router 2) can access devices on Subnet 1 (router 1) but not vice versa? [closed]

I am new to the world of network so please bear with me. I have chained two routers to create two subnet at my home. I have two routers and second router is connected to my ISP ADSL modem router by ...
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2answers
920 views

Subnet a network address [duplicate]

From network address 10.0.0.0/10 i have to create 150 subnets with minimal number of bits borrowed. The question is: should i borrow 8 bits or 6 bits from host part. An online subnet calculator ...
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2answers
766 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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1answer
299 views

What is the point of the "subnet" concept? [duplicate]

I'm having trouble understand exactly what the point of a subnet is. I read about WHAT it is, and all definitions say something along the lines of that it is a logical grouping of nodes with the same ...
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4answers
90 views

Why isn’t there routing inside subnets?

As far as I know, inside subnets, there is no such thing as routing. How are IP-packets « routed » inside a subnet, and does this circumstance has an influence on how subnets are set up? Thank you in ...
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1answer
333 views

Determining the CIDR notation to provider host per subnet

The question is: Given the Network ID 41.149.210.0/24, subnet to provide 12 usable hosts per subnet. What is the new mask in CIDR notation (without the leading /)? My question is, how... and ...
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3answers
51 views

How to make 2 diffrent networks in router ping each other

Hello i have this 2 routers how i can make them ping each other and alos the devices connected to them
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1answer
66 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 ...
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1answer
72 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 ...
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1answer
801 views

Dividing IPv4 Network into 7 Subnets? [duplicate]

I've been trying to figure out how to divide a network IPv4 IP Address into 7 subnets, where each subnet requires a different number of hosts. For example I have the question: "You are an intern at ...
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2answers
1k views

IP address calculation [duplicate]

ISP grants block of addresses starting with 190.100.0.0/16. It needs to distribute IP's to customer as:- a)First group has 64 customers, each with 256 addresses. b)Second group has 128 customers, ...
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3answers
649 views

how to make multiple subnet able to use one resource without being able to connect to each other in any way

i`m trying to connect multiple subnets to one web server but these subnets should not be able to connect to each other.i cant make any changes on these subnets. I just have a lan cable from each ...
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1answer
182 views

different network mask and subnet mask and netmask [duplicate]

1- what is network mask? 2- what is subnet mask? is there any differnt between network mask and subnet mask? i'm tried to search about network mask and nothing found is it called netmask ? thank you
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2answers
924 views

Restricting IP subnets to specific VLANs (Brocade ICX)

Say I have an uplink port (1/3/1) connected to our upstream, then various clients across 1/1/1 - 1/1/48. I want to create two or more VLANs where each VLAN can only use IPs from a specific subnet. e....
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1answer
485 views

Meaning of fixed length sub-net masking?

What is meant by fixed length sub-net masking? Is it mean Class A -----255.0.0.0 Class B -----255.255.0.0 Class C -----255.255.255.0 As i understand its mean is keep the length of the network prefix ...
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1answer
2k 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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1answer
265 views

Why CIDR block is assigned to subnet? [duplicate]

If VPC is assigned CIDR block 172.31.0.0/16, then I can create sub-nets within VPC, following this procedure: 172 . 31 . 0 . 0 255 . ...
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1answer
1k views

Router IP between networks of different classes

I have 2 networks that I want to ping each other, one of the networks uses class B 172.16.16.0/19 and the other network is class C 192.168.0.0/26. Both networks have their own subnets and vlans, and ...
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1answer
3k views

Calculating valid host range [closed]

what is the first valid host and the last valid host for the network that the IP address 10.150.174.20/17 is a part of?
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1answer
55 views

Which maximal amount of nodes can subnet with mask 255.255.255.248 contain? [duplicate]

Which maximal amount of nodes can subnet with mask 255.255.255.248 contain? Kindly explain how it can be calculated
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1answer
49 views

Binary to decimal conversion question [closed]

If Decimal 15 = Binary 00001111 can it also equal 01111 ? If not why? sheet with conversion decimal-binary
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2answers
703 views

What is happening to the 3rd octet in this question? [duplicate]

Today during a free online CCENT exam I was given the following question: Which 2 statements best describe IP Address 10.16.3.65/23? The 2 answers were: The Broadcast Address of the subnet is 10.16....
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1answer
163 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.
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1answer
1k views

Find the subnet mask,number of hosts and IP ranges? [duplicate]

I have couple of questions related to IP addressing. The public IP for a company is 190.28.0.0. a)This is a class B address, right? CIDR value is /16? b)If the company wants to have 8 subnets, ...

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