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Questions tagged [lan]

For questions about Local Area Networks (LANs).

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How can I add a storage device to my router? [on hold]

How can I add a storage device such as pendrive to my router , which can be accessed by all device connected to the lan network (router) ?? NB : low cost is a must 😁 TIA
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2answers
36 views

How to give one pc with dhcp a default-gateway while the rest use static ip and static default-gateway

I have this topology where the PC0, Server0 and PC4 use static ip and static default-gateway, but one pc is Request DHCP, so i have to use DHCP ip address for him and static ip for the rest, now the ...
4
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2answers
2k views

IP addresses from public IP block in my LAN

If I have NAT or PAT applied on edge router, Would it matter if I use IP addresses from public block in my LAN? And how?
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2answers
550 views

Transferring data speed of Fast Ethernet

I am wondering that between 2 hosts in LAN, when i send one file which weights 1Mb versus 1 file weights 0.3Mb from the first host to the second host using TCP/IP protocol, would the latter come first?...
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2answers
810 views

What precisely is a link?

When reading about layer 2 the word "link" is frequently used but strangely I'm struggling to find a formal definition of it. What is the precise definition of a link? So in the image below, how many ...
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2answers
36 views

Addressing for a WAN, LAN and DMZ

I was wondering about the addressing for certain types of networking areas... I use 192.168.0.0 for a LAN network, 10.0.0.0 for a WAN and 172.16.0.0 for a DMZ. But I've been confused why a 10.0.0.0 ...
2
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1answer
69 views

Using an Ethernet cable and USB Ethernet adapter at the same time?

What would happen on using an Ethernet cable connected to one network and then plugging in another Ethernet cable but using an USB Ethernet adapter from a different network. Would it connect to both ...
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1answer
61 views

Does sending a packet to a private IP adrress for a local network interface work in the same way as sending it to a loopback address?

On my local host, there is a loopback address 127.0.0.1, and a wifi interface with private address 192.168.1.97 assigned by the local wifi network. Do both the loop back and private IP addresses ...
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2answers
25 views

LAN connection with out VPN

Is it possible to connect LAN between 2 systems which are located in different areas and connect with same ISP ?
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1answer
70 views

Switch Configuration for Connecting LAN and WAN

Totally new on networking and on switches, so excuse me if I use some wrong terminology. Problem I have 1 computer and 7 instruments. I would like to form a network setup fulfilling the following ...
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1answer
49 views

How do i find out if a LAN is behind a multi-level NAT? [closed]

Not much i can specify here - its obvious that my CPE is NATing my LAN, but how do i find out if my ISP is using a carrier-grade NAT (obviously, without asking them)? I heard that port forwarding is ...
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2answers
89 views

Please help me understand this simple arp request / reply - how does a router know an IP address without knowing the MAC address?

I am new to networking, I am using Wireshark on my home PC to learn about ARP. I understand that ARP is used to build the ARP cache, which correlates IP addresses to MAC addresses on a LAN. ARP ...
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1answer
42 views

Connecting two ISPs on one network

I am working in an institute where the internet connection is divided amongst 3 different floors: Ground Floor, First Floor and Second Floor. Now since I am new to the networking, I know the ...
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1answer
53 views

Ethernet Protocols (Modbus TCP/IP & Ethernet/IP) can be in the same network and in a ring topology without problems?

Ethernet Protocols (Modbus TCP/IP & Ethernet/IP) can be in the same network and in a ring topology without problems? Please, refer to the attached drawing. What are the equivalent Cisco Switches ...
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2answers
80 views

What's the role of Default Gateway?

It acts as the "gateway" to the Internet,but also from what i have read,it's the last thing a packet would be sent to while trying to route (when checking the senders' route table). Maybe it's the ...
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0answers
18 views

DHCP Broadcast messages [duplicate]

Why are there so many DHCP broadcast messages while trying to give a computer some network settings? 2.Last,when can these broadcasts be avoided and how are DHCP relay agents related to the whole ...
0
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1answer
146 views

Access to a server behind the SonicWall from the LAN using Public IP addresses

We have a SonicWall TZ 400 with a Comcast Modem in Bridge Mode. Everything works fine, except the fact that the exposed services on the LAN couldn´t be reached using the public IP of the WAN from the ...
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1answer
84 views

How can I configure link aggregation/bonded LAN for my simple Ubuntu router build? [closed]

I'm spinning out on this one...! Someone please help! I followed this fab tutorial below to make my own Ubuntu based router: How to build a simple router Ubuntu Server 18.04 Which works great using ...
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2answers
33 views

LANs with no router,just a switch(or hub)

Can a LAN be implemented just with a switch? If so,how is the communication completed?just by MAC addresses? When sending a frame from the source to the destination,and inbetween there is a switch,...
4
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1answer
77 views

Industrial machines lose connectivity when one is powered off

I am working with 2 identical industrial machines with multiple Ethernet switches per machine. The basic layout looks like this: Switch 1 Machine A -> Switch 2 Machine A -> Switch 4 Machine A ...
0
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1answer
51 views

How does a router forward datagrams from the internet to an interface of a private network?

As I have seen in How does a router know to which PC in a network to send a response from a server? if I haven't misunderstood it, if an interface in a private network sends a Datagram to the outside ...
3
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3answers
515 views

Basic networking and DHCP theory

Background We're organizing an event where we need to connect about 10 PCs into a single LAN network (no internet access). We've got some general experience with "home" and "web" networking but we've ...
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1answer
21 views

Decentralized instance communication [closed]

I intend to build an application that will run on several devices and its main task is storing and presenting data. This application will be deployed to several devices. These various instances should ...
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2answers
597 views

How to force users on my LAN to use a specific DNS server using ARP poisoning?

I'm attempting to force all hosts on my LAN to use a specific DNS server to filter certain material, however I'm running into problems. I've had problems in the past trying to configure my router's ...
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2answers
48 views

How can a public DNS server know the hostname of a machine on a private network [closed]

Example: a home LAN a simple SOHO router (both DHCP and DNS server at 192.168.1.1) 2 client machines (192.168.1.2 and 192.168.1.3) Is it possible for the Google public DNS server located at 8.8.8.8 (...
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2answers
160 views

How does WAN work?

I understand the basics. WAN is a network that connects multiple LANs together. Usually the router is the connection between the LAN and WAN. But I have some questions books and the internet could not ...
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2answers
98 views

What Are LAN technologies?

I know about different LAN topologies(like star, bus, ring,...) and that Ethernet is one of the ways to practically implement wired LANs. I wonder what other technologies exist to make LANs? And, is ...
2
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3answers
71 views

Pinging computer on a local wireless network, what exactly happens?

I'm trying to get a better understanding of networking in general. Here's one of the many questions I got: What exactly happens (network wise) when I ping 192.168.0.5 from 192.168.0.3, when both are ...
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4answers
5k views

What is the difference between DHCP and NAT?

Both seem the same to me. I don't see how DHCP is different from Dynamic NAT. Can anyone please help?
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1answer
288 views

Why am I getting different public ip from two computers on the same local network [closed]

This is a network setup in a lab of academic institution PC1: Connected to wired LAN socket of Lab. Connection is DHCP. IP: 10.21.106.221 Netmask: 255.255.252.0 Default Route: 10.21.107.254 ...
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4answers
923 views

What is the purpose of 3 or more LAN ports on routers?

what is the typical purpose of 3 LAN ports on a router ? What kind of usage require more than 3 ports ? Are LAN ports on routers similar to the capability of a managed switch ?
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1answer
171 views

connect two routers each one with a LAN with a cable (no internet)

i want to connect two LANs, each one has a router, to allow pc's to communicate between the two LANs without internet. i am a complete beginner in networking and i need to make this project urgently. ...
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1answer
87 views

Compatibility of CentreCom Transceiver 210TS 10BaseT Ethernet with modern Ethernet

I have two old legacy system communicating each other using CentreCom 210TS 10BaseT Ethernet Transceiver. The Transceivers are connected to AUI port of system. SQE test is disable on both transceiver. ...
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2answers
55 views

Creating bandwidth with multiple WAN and LAN ports

I have a network with roughly 50 machines all on one LAN, consisting of Linux, Windows, and server machines. I have an untangled u150 firewall/router. I have the ability to add an additional WAN &...
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1answer
540 views

Maximum no of Host's possible in private network on class wise? [duplicate]

my query is that what is the maximum no of host's are possible for Private network in class wise. i.e i want to know No of Private host's in CLASS A,B,C? how to calculate these no?
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7answers
3k views

How LAN works in video games if only one station is permitted to transmit?

I've read the in a LAN the data is transmitted in packets so as to allow only one station to transmit at a given time, so how could this be applied in video games LAN parties if only one device is ...
4
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2answers
993 views

How does Ethernet Switch ensures the validity of the MAC address table?

Let us say I have switch S with 4 ports, PA, PB, PC, and PD, to which I have connected 4 hosts, A, B, C and D with the MAC addresses AA:AA:AA:AA:AA:AA, BB:BB:BB:BB:BB:BB, CC:CC:CC:CC:CC:CC and DD:DD:...
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3answers
1k views

How is data sent from multiple different sources (computers) to the same destination host (computer) on a local network is handled by switch?

Let us say I have switch S, to which I have connected 4 hosts (A, B, C and D). Now let us say hosts A and B both want to send a series of data to the same host D at the same time. So here, A and B are ...
3
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1answer
276 views

Change of IP address range

As part of a corporate project, I am responsible for changing the IP address range of remote sites. I will show you a theoretical scheme of the network and explain the details of the migration. My ...
2
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1answer
56 views

What does a LAN switch do if hosts are/are not in the same LAN?

If some host sends a frame to another one that is not in the same LAN, a the frame arrives to a LAN switch, what does it do? I believe it would broadcast it, but I'm not sure about it. And what if ...
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1answer
88 views

How to prevent getting other machine traffic in LAN on interface

I capture traffic of VMware machine in LAN (host pc is in LAN) with Wireshark. But I see a lot of garbage traffic like LLMNR, NBNS, STP, ... . I know I cat prevent capturing such traffic by using ...
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3answers
1k views

Error Detection across OSI layers confusion

Confusion: How does the transmitter know that his information( bits in physical layer, frames in data link layer, packet in network layer ) was transmitted correctly to the receiver? I know that in ...
2
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5answers
101 views

How 2 computers with different speeds communicate

This is one extremely basic and probably equally dumb question that I just couldn't ever find a definite answer to. Suppose we have 2 computers one that can transmit data at say 10 bits per second (A)...
7
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8answers
3k views

Can Ethernet frames only be transmitted in a LAN?

In the LAN depicted in the picture below, am I correct in saying that devices do not have IP addresses? There is no router and also only Ethernet frames (with source and destination mac address would ...
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2answers
465 views

Collision domain in full duplex mode switch

In my understanding switch can operate in half duplex or in full duplex mode. In half-duplex mode only one wire pair is used, but in full duplex mode two wire pairs are used. In half duplex mode ...
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1answer
452 views

How the two computers are able to ping themselves which are connected to single router but both are in different Network?

I have configured network as shown in figure. as we know that we can't ping computer which is in the other Network without routing protocol. then how I suppose to ping this computer as shown in figure ...
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5answers
1k views

Is a pfSense router w/ a LAN gateway using a /20 bits subnet mask common?

Obviously I'm lacking some networking knowledge, and I wish somebody could help me understand something fishy I found on a pfSense router in an organization yesterday. The pfSense router forces subnet ...
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1answer
73 views

Is it possible to configure router to prioritize “normal” network usage over “torrent” downloads high network usage [closed]

I have a typical problem of having a shared connection with many people. The connection provided by my ISP is good enough to service many people (50mbs). However, every now and then, when someone ...
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1answer
216 views

Cisco: How Do I Remove a LAN Network From a Router?

I know this is probably a simple question, but for some reason I cannot think of a command. I am using RIPv2 configuration, and simply need to remove a LAN address from the router. Can anyone give me ...
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2answers
387 views

Does a router divide a LAN into two seperate LANs, or a single LAN with two subnets?

The figure below is part of a networking homework question. The question asks about the source/destination IP and MAC addresses of frames sent throughout the system. My question doesn't touch on that ...