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Questions tagged [ipv4]

For questions about Internet Protocol version 4 (IPv4); as specified in RFC791.

0
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1answer
15 views

Can I route to a IP that is not in my subnet but hosted in my subnet [on hold]

So, I have two networks, one say, 10.0.1.0/24 and 10.0.2.0/24. I have a server with IP 10.0.2.1 that is hosted somewhere in the subnet of 10.0.1.0/24, can I reach this IP from my subnet 10.0.1.0/24 ...
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1answer
22 views

Packet tracer - why “show ip route” shows network address

This is just a quick question I am wondering out of curiosity. When I set up a network in packet tracer, why does "show IP route" show the network address (example: 199.120.5.64/27) and not the IP ...
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0answers
9 views

Network addressing [on hold]

A network administrator is building a network for a small business that has 22 hosts. The ISP has assigned only one internet routable IP address. Which IP address block can the network administrator ...
0
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1answer
24 views

Public IP addresses on cloud platforms [on hold]

My question is about cloud platforms like AWS or Azure. Whenever we create an instance (VM or VPC), AWS allocates a set of public and private IPs for that instance. Now the number of user accounts (...
0
votes
1answer
32 views

How does a host figure out the broadcast domain for a /23 [duplicate]

If a host has IP 192.168.20.150 with DHCP server say 192.168.20.10, how does the host know the bounds of the subnet? is this where proper network subnetting comes in? To clarify... the DHCP server ...
7
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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....
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2answers
83 views

How to block youtube url on a cisco router

How can i block youtube on a cisco router? I have already used class map as seen below class-map match-any url-block-class match protocol http host "*youtube*" ! policy-map block-class policy-map ...
2
votes
1answer
44 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 ...
-1
votes
1answer
37 views

MAc address or IP address? which one gets used from my pc to router? [duplicate]

Question 1) which one is used nowadays? NAT or PAT? Question 2) as I knew, when my pc requests some website, what happens is , the data(packets) from my pc go to router. then router makes the request ...
1
vote
1answer
34 views

IPv4 only host on a dual stack environment

I am looking into migrating to IPv6 at my company. Our plan is to dual-stack everything for now, however, we have a couple of local servers that are IPv4 capable only. The rest of our network will be ...
1
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2answers
83 views

How are IPv6 addresses grouped? [closed]

I apologise off the bat if this question is too basic to belong in this group. Perhaps it can be moved elsewhere if that's the case, or I can be directed to another SE site. With IPv4 I have long ...
1
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1answer
32 views

Where is the block which caused IPV4 client can not access IPV6 Server

I read many documents which are saying if you are in IPV4 network then you can not access IPV6 network, for example when I was at home I can not access some IPV6 website, such as:ipv6test.google.com. ...
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0answers
27 views

Hi Please help me to divide below network address into 2 sub nets . 172.172.172.172/24 [duplicate]

Hi Please help me to divide below network address into 2 sub nets . 172.172.172.172/24 regards, annonymous
1
vote
1answer
24 views

Defining what type of casting based on IPv4 address

I'm kinda new to networking. I have a small question, how can I determine what type of casting (unicast, multicast or broadcast) is it based on IPv4 address. For example: 142.55.172.200 I tried to ...
6
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4answers
1k views

Does every host on the LAN share the same ARP table, or do hosts keep them individually?

I'm just learning about ARP. I'm a little bit confused. My confusion is better explained in a scenario. Host A is communicating with Host B. Host A knows Host B's IP address, but not it's MAC address....
2
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2answers
48 views

How does ping 1.1 convert to ping 1.0.0.1?

I need the rules for these ip address shorthands. C:\Users\avina>ping 1.1 Pinging 1.0.0.1 with 32 bytes of data: Reply from 1.0.0.1: bytes=32 time=3ms TTL=58 Reply from 1.0.0.1: bytes=32 time=4ms ...
2
votes
1answer
45 views

inconsistent bad mask error

in packet tracer i was assigning: 83.174.16.164 255.255.255.248 to 3560 switch which shouldn't throw an error of bad mask given that it is in the usable range: Address: 83.174.16.160 ...
4
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1answer
332 views

Will the packet be dropped when the number of hops equals to default TTL?

From my understanding, the default TTL represents the maximum number of hops allowed such that the packet may reach the host. NTP Documentation Archive: ttl - This option is used only with ...
18
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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 ...
-1
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
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1answer
39 views

How color is encoded in the DS field/ToS IPv4 - QoS?

The RFC 2698 says - "The color is coded in the DS field [RFC2474] of the packet in a PHB specific manner". I am trying to understand how color is encoded like in the IPv4 header - in the TOS field ...
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2answers
75 views

Why we need ARP when each device has its own IP address?

I don't really understand Address Resolution Protocol (ARP). Why we need ARP when each device has its own IP address?
2
votes
1answer
37 views

Why aren't we encrypting data on Network level instead of transport level when using e.g. HTTP [closed]

Why we are bothering to encrypt our data on a transport level, instead of just doing that on a network level with e.g. IPSec and get rid of the need to to that in upper layers. For example instead of ...
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0answers
18 views

Why are there only ~4 billion IP address available? [duplicate]

I am new to networking, so I apologize is this question is naive. I understand that 2^32 = ~4 billion. However, if you add in subnet masks, won't this number increase? For example, let's say you have ...
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votes
2answers
123 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?
1
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1answer
40 views

Exclude 10.63.128.0 10.63.255.255 or 10.63.128.0/17 range from 10.0.0.0/10

Please help to suggest a method to exclude IP range 10.63.128.0 10.63.255.255 from 10.0.0.0/10. I have a access list 3100 to filter the traffic with rule 10 10.0.0.0 0.63.255.255 and now I have to ...
1
vote
1answer
68 views

Rate-limiting policer on aggregated ethernet (AE) bundle

I am facing problem regarding firewall policier on Juniper MX platform. We have bundle link (AE Link) consisting of 2 x 10G links on which P2P IP is configured with customer for internet access. Now ...
0
votes
2answers
32 views

How to know difference between 2 devices connected to the same Wi-Fi hotspot in IPV4?

I am working on a small project to make a client server program to make a connectionless implementation & I want to transmit Information between 2 devices which is connected to the same Wi-Fi ...
1
vote
2answers
371 views

0.0.0.0/32 Special-Use address

I was wondering what is the role of this special-use address. The similar 0.0.0.0/8 represents a host with no IP assigned,but it's not the same with the 0.0.0.0/32 address What is the difference?
2
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2answers
154 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, ...
4
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2answers
750 views

What does it mean to lease an IPv4 block?

When you lease an IPv4 block, what do you actually get? How do you get access to the IP addresses? Is there any special equipment required or is it as simple as renting a server?
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votes
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 ...
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1answer
52 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 ...
0
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1answer
132 views

IP Addressing-Why All zero(0) and all one(1) in subnet id bits are reserved?

I'm studying about class less inter domain routing. I've come to know that all zeros(0) in host id bits refers to subnet address and all ones(1) in host id bits refers to broad cast address. So, ...
0
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1answer
18 views

Daisy chaining IOT devices without switches? [closed]

I have multiple IoT board with two network interface in each device. I want to connect them in a daisy chain without help of switch. The eth1 of first device will be connected to eth0 of second device,...
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2answers
30 views

How can subnets not fulfil symmetric property?

While studying Internet Protocol, I came upon the following example of two devices: Device A: IP address: 10.1.1.1 Subnet mask: 255.255.255.0 and Device B: IP address 10.1.1.200 Subnet mask 255....
2
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0answers
43 views

DHCP ivp6 vs DHCP ipv4 router config (cisco)

When setting up a router as dchp server in ipv4, we specify a pool under which we give the network and the default-gateway and that's it: However in ipv6 stateless dhcp , we create the pool then ...
2
votes
2answers
172 views

NAT Translation Table Port Number

I had a practice question about a NAT-enabled router with outside address 24.34.112.235 and inside network 192.168.1/24 and three inside hosts .1, .2 and .3. The three hosts all open two connections ...
7
votes
1answer
249 views

Is the first address of the subnet a valid configurable address in case of IPv4 and IPv6 point to point networks?

Am I correct, that first address of the subnet is a valid addresses to configure in hosts/routers in case of IPv4 and IPv6 point to point networks? For example, in case of 192.0.2.0/31 one of the ...
1
vote
1answer
37 views

I am trying to set up aDHCP server in a VLAN for practical of networking with Linux

I am a Linux user requesting advice about setting up a DHCP with a VLAN based on offices on one floor for the practical purpose. Is this good enough for implementing a VLAN structure with a DHCP ...
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2answers
38 views

My ip address changes daily. How can I setup port filtering so that I can access my VM via RDP without adding the new ip everyday?

So I have a VM in Azure. I would like to ensure that only I can access it. I setup port filtering so that only my IP is accepted, and only from port 3389. The next day my IP changed, but only the ...
0
votes
1answer
30 views

Pings are being swallowed by switch infrastructure until opposite ping is performed

Eleven layer2 managed NetGear switches. Have a strange problem in that some default OS install PCs are unpingable ( newDefaultInstall ) from host X until host X is pinged by the new machine. All ...
2
votes
2answers
82 views

Public IP addresses

Are all Public addresses connected to each other? Can I ping my friend's public IP address on another side of the world? or public addresses are divided into groups( something like private and public ?...
2
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1answer
51 views

My OSPF Multi Area Topology is not reliable

I made an ospf multi area topology, but it's inconsistent. At times, host from the A area could ping to hosts in other areas however, sometimes otherwise (failed to arrive). Whenever I tried to do a ...
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votes
1answer
79 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 ...
3
votes
1answer
58 views

How can hosting providers give you a dedicated IP adresses?

Some hosting providers give you an option to get a dedicated IP address with your hosting package. For example: Digital Ocean gives every droplet that you create its own dedicated IPv4 address. I can ...
1
vote
1answer
74 views

How does a packet travel across multiple routers/subnets?

After reading various resources and examining the example below, the step-by-step process for a packet to travel the route below is still not 100% clear to me. I'm hoping to get clarification. Image ...
0
votes
1answer
45 views

Basic IPv4 Question

I just recently learned about IPv4 and the different classes. Let's say I have a following arbritary IP address : 12.123.123.45 Now, the first octet is below 127 and thus, it tells me that this IPv4 ...
6
votes
2answers
175 views

What Cisco will discard TTL=1 packets for own interface?

There have been a number of questions about router behaviour with IPv4 packets with TTL=1 and apparently contradictory answers. This question is not about what should a host or router do, it is a ...
0
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1answer
271 views

(CISCO Packet Tracer) Overlap Error

I am trying to set up a network of for different organisational departments based on a given typology: Using Cisco 2911 routers & 2960-24TT Switches. With given addressing of: 'EIGRP 101' 172....