Questions tagged [ip]

For questions about Internet Protocol (IP), an OSI layer-3 network protocol. There are two current IP versions in use: IPv4 and IPv6.

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4
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1answer
888 views

What does it mean to “plumb” an IP address?

Plumbing an IP address means what? What are some examples of it?
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0answers
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Questions TCP -IP -erthenet [closed]

I have answered some questions and I would like your ability as an expert to let me know if I have covered much of the background of each question.I would like to listen you as experts. It is "A ...
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2answers
84 views

Why router can't be used for converting different model of network but gateway can do this?

We know that Router can't be used for converting different model (e.g OSI model to TCP/IP or TCP/IP model to OSI) of network. It isn't a multiprotocol converter. But gateway is a highly sophisticated ...
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0answers
12 views

Error: unknown connection [closed]

I am trying to add a secondary IP to an active network enps0 but when I sudo nmcli con mod enp9s0 +ipv4.address "184.67.98.42/24" I get Error: unknown connection 'enp9s0'. I am on CentOS7 ...
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0answers
13 views

Can't find error in my TCP frame with SYN FLAG [closed]

80 FA 5B 90 BF 5C 12 48 07 06 20 03 08 00 45 00 00 34 A1 B2 40 00 80 06 00 00 C0 A8 01 6D C0 A8 01 64 00 50 13 88 87 65 43 21 00 00 00 00 80 02 FA F0 11 9F 00 00 02 04 05 B4 01 03 03 08 01 01 04 02 ...
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1answer
81 views

TCP IP Packets in 5G

How TCP/IP packets behave in 5G communication with shorter time slots duration. Does shorter slot duration improve the TCP/IP packet level latency.
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1answer
54 views

What defines a device as connected to the Internet? [closed]

I recently saw a SO question: Are there global networks other than the Internet? I am aware of other networks such as ATM and the telephone network, which are not part of the Internet. My question is, ...
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1answer
36 views

Why in the TCP/IP model the link & physical are one?

I'm currently learning about the OSI model and the TCP/IP models, and I was wondering: Why in the TCP/IP model the physical layer and the data link layer are combined? I'll state how I understand the ...
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2answers
449 views

Why are Internet hosts "not required" to receive an IPv4 datagram larger than 576 bytes?

I'm currently studying Internet protocols and had a question regarding the IP datagram. Within the IP header I am aware there is a field called "total length" which specifies the total ...
3
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1answer
69 views

What is SLIP good for? [closed]

I read a bit about SLIP in few places, and from what I understand, the goal of this protocol is to allow the transfer (or encapsulation) of IP packets between hosts over a serial line. But I don't ...
3
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2answers
147 views

Why can IPv4 and IPv6 use strict source routing(in options field) and flow label respectively inspite of connectionless protocol?

In IPv4 option field one field option is source routing option this means packet will always be routed by router Or not. Packet can also be routed by source such routing is known as source routing. ...
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0answers
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lan with multiple ip [duplicate]

If imagine lan assigned ip from from this range (192.168.1.0/24) then can we assign another ip from same subnet mask? If no why?
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2answers
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How is IP address assigned to physical location

I was thinking about buying IP addresses so i could setup small hosting company. I know that i can rent IP addresses aswell. I have alot of knowledge about networking in common but i don't understand ...
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2answers
53 views

Why does the Transport layer break data into packets? How does that make things reliable? Isn't the Network layer doing the same thing?

I'm new to CNs and there is something that I can't yet grasp. Why doesn't the Transport layer let the Network layer do all the splitting up? How does segmentation make things reliable? Also, I ...
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0answers
15 views

WAN ip address looks like private ip, but whatsmyip shows a public ip address [closed]

Let me preface this by saying that I'm not very good with internet networking, but I tried my best to gather information. So I've been meaning to do some port forwarding to open a server, but I got ...
2
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1answer
222 views

OSI Model vs Network Model: Does It Matter Which One You Use?

The OSI (Open Systems Interconnection) model is comprised of the following layers: 7. Application Layer 6. Presentation Layer 5. Session Layer 4. Transport Layer 3. Network Layer 2. Data Link ...
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6answers
5k views

Raw IP communication?

I'm studying the difference between the protocols IP and TCP. IP is said to provide an unreliable datagram service whereas TCP provides a reliable bytestream service. Further, TCP works on top of IP. ...
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1answer
57 views

Must the host IP be contained in Router's subnet?

The settings are: manually set my host IP: 10.0.1.6/24, gateway: 10.0.0.138/24 they both know each other's MAC (arp -a shows the list) and there is a direct physical connection between them. From the ...
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2answers
107 views

Class D network for multicasting between group

We know Multicasting is defined as a single source sending to multiple recipients on a network when the receiver broadcasts a signal for acceptance. Multicasting has its own Class D IP addressing ...
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0answers
14 views

Definition of a socket [duplicate]

I wanted to confirm whether the definition of a socket I've understood in a computer network context is true. A socket is file who is unique and named by local IP,Local port, Foreign IP and foreign ...
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2answers
3k views

Why there is only one hop in the tracert?

I use the tracert to a remote server IP address: C:\Users\lll>tracert 103.224.19.11 Track by up to 30 hops The route to f1.FF-SALE.COM [103.224.19.11]:    1 44 ms 44 ms 44 ms f1.FF-SALE.COM [103....
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2answers
120 views

Why do we need ATM if SONET/SDH can carry IP directly?

If SONET/SDH can carry IP, and ATM rides on SONET/SDH, then why do we need to encapsulate IP inside ATM? That makes "IP over ATM over SONET/SDH". What's its benifit over "IP over SONET/...
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3answers
698 views

Connection between 2 end devices with different subnet masks (Packet Tracer)

I was just wondering why Packet Tracer allows 2 end devices to ping each other even though they're specced with 2 different subnet masks? am i missing something here? i.e. PC1: 192.168.1.10/24 PC2: ...
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2answers
43 views

Can I assign one of my publicly available IP address to my AWS instance?

I would like to be able to use one of my publicly accessible ip addresses directly with my aws cloud instance. Is there a way I can assign or transfer one of my ip address to aws? My ARIN registry ...
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2answers
21 views

How an intranet can be invisible to the IP module if the IP module allows a non-networked device connect to a network system?

A quote from RFC 791 document "Fragmentation, transmission and reassembly across a local network which is invisible to the internet protocol module is called intranet fragmentation and may be ...
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2answers
53 views

Can Vendor User Mac Address of Another?

I heard that each vendor is given a specific start in the Mac Address to use. What's the problem of me creating a company and using the start of Mac Address given to google or Cisco? how is this ...
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1answer
82 views

Duplicate IP in one LAN

I have a small LAN. there are: One linux PC with IP x.x.x.10 an unmanaged switch two different devices that share the same IP (x.x.x.1) (lets call them device 1 and device 2). The idea is to power ...
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0answers
9 views

Finding IP address [duplicate]

I have a device (logger for data acquisition), ut seems that someone has changed it's default IP address and lost it. I can't access it. Is there's a way to find it's IP?
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1answer
303 views

How to configure IP addresses in cisco packet tracer?

Hello I am working with Cisco packet tracer. I have two laptops connected to a wireless router with IP addresses assigned using DHCP. The router's Internet IP address is 10.1.0.0 and the LAN address ...
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2answers
4k 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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1answer
1k views

How to Run Static IP Through Comcast Business Class Modem to Router?

I apologize in advance for this kind of nebulous question, but I'm very stuck after many hours of trying and I need help. Here's what I have: Newest model of the Comcast Business Class Modem/Router ...
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6answers
17k views

How many IP addresses can a device or an interface possess?

Can one IP address be assigned to more then one device or interface? In which situations may this happen? Can one device or interface posses more than one IP address?
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1answer
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Cisco Packet Tracer Hub IP

The problem that I'm facing has to do with the labeling above the hub's. I tried every possible hub in Packet Tracer and none of them had the configuration for IP. My guess is that the IP given is the ...
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1answer
83 views

How does Network Layer behave when client received a unicast DHCP offer?

I went through various stack exchange post to understand the concept of DHCP offer when it comes as a unicast to client from the DHCP server. A server can send a unicast DHCP offer since it knows the ...
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3answers
14k views

Is a TCP three-way handshake required for an HTTP POST?

I don't quite understand if i posting http form data from the browser to the server, does the protocol still need to make three-way handshake (syn-ack-data) or it only works for GET http requests?
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1answer
100 views

Static routes and subnetting

Network: 10.0.0.0/24 I decided to divide it into 4 sub-networks: 10.0.0.0/26 10.0.0.64/26 10.0.0.128/26 10.0.0.192/26 If I have to configure static routing on an external router, can I use the ...
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2answers
36 views

Does NAT change the L3-Encapsulation at all?

Let's say that a packet I sent requesting for a https server successfully reaches my target (NAT) router. The router receives it and through port-forwarding/triggering policies, it knows it has to ...
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0answers
22 views

What're the relations between 127.0.0.0/8 and 127.0.0.1? [duplicate]

What're the relations between 127.0.0.0/8 and 127.0.0.1? As per this post, it seems that they are the same thing. I am a newbie at the network, could somebody shed some light on this question? ADDED: ...
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5answers
124 views

How is an IP packet sent to the gateway?

This is some route command output sample: $ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.240.1 0.0.0.0 ...
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1answer
49 views

How does deep packet inspection (DPI) extract metadata from packets?

DPI software extracts metadata (as an additional function apart from classifying applications / protocols) But how does it do this? For classification, I get that you can use pattern matching or port-...
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3answers
50 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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2answers
82 views

It is possible to have multiple webservers running on same port inside one network?

Lets say we have a network A with two webservers inside it, S1 and S2, both hosting a website on port 80. When a client from a different network is addressing A:80, which host inside network A, will ...
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2answers
37 views

How to tell if a device on the network is an access point?

Let's say we have a network with multiple access points. The command arp -a can be used to list the IP addresses and physical addresses of the devices that are on the same network. Now, is there a way ...
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1answer
35 views

In TCP, when a receiver starts sending duplicate ACKs to the sender, does it also send ACKs for packets it has received past the hole?

I know that if a receiver sees holes in the packets it receives, it starts sending duplicate ACKs containing seq numbers of missing packets. At this time, the receiver is also receiving packets that ...
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1answer
50 views

What is the difference in reliability of sending a pure ACK packet (without any data), as opposed to a data packet in TCP?

I was going through the book TCP/IP Illustrated and in the zero windows section, I noticed the use of a TCP persist timer - which is used to avoid losing a window update message from a receiver after ...
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1answer
31 views

How does NAT modify the headers correctly?

How does the process of replacing the incoming message (say from stackexchange) to the router, and modifying the header with my PC IP happen? How does the router know which IP to insert there? Is ...
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1answer
129 views

IP Address Direct Assignment

What does it mean when a "whois" report says that an IP Address is owned by CloudFlare and the "net type" is "direct assignment"? example follows: NetRange: 104.16.0.0 -...
11
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3answers
6k views

Why do we need MAC Address if we can uniquely identify each machine with an IP Address

I learnt that in ARP Protocol, to send a packet from one machine to another machine we need to know the MAC Address of the destination machine but since the destination has already been assigned a ...
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0answers
45 views

Eigrp flapping while using natting with route map

I have configured a topology which contains ip sla , route map , dual natting.It work perfect but when I used route map natting the eigrp become flapping and show the error is "retry limit ...
0
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1answer
39 views

Did a "network hub" actually send and receive all data to every node? [duplicate]

In the early 2000s, I went to a store and bought a Netgear "network hub" either exactly this one, or extremely close to it: https://upload.wikimedia.org/wikipedia/commons/d/d9/...

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