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Questions tagged [lan]

For questions about Local Area Networks (LANs).

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Strange repetitive ping pattern [closed]

A Hitron MoCA 2.5 device is locally (LAN 10.10.10.37/24) directly RJ-45 connected to a 1Gb switch. The cable is cat-6 and about 10 meters long. (the other Hitron is in another distant room, IP 10.10....
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Selecting between two identical physical networks [duplicate]

I have two networks with same components and same IP addresses, which we now want to remotely select through an operator screen as shown in the figure. In other words, we are choosing whether we ...
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1 answer
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How does providing IPv4 occur through mobile internet?

I've read that there are 2 types of IPv4 addresses: public ip-address and private ip-address. Public ip is used to connect devices to the internet (WAN). There's always an example about routers that ...
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1 answer
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Is the "ping" command a broadcast message?

I am learning about how ARP works and I have some questions regarding the ping network utility. ping is used to test connectivity and reachability between devices. PCs have their own ARP table where ...
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What defines WI-FI?

I don’t quite understand what exactly WI-FI is (regarding to the computer network theory). There are many different definitions of this term. Somewhere it's written that it's a wireless LAN technology,...
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  • 113
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What is difference between broadband and baseband signal with respect to full duplex?

We know that broadband signal is full-duplex, for example television cable line where all TV channel is used portion of bandwidth not full bandwidth. And modern baseband is also full duplex but all ...
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Why collision domain occurs in hubs but not switches [duplicate]

if anyone knows the actual point and in depth answer to my question please help. the links in the comments didn't helped at all Most of the websites which i saw are just vaguely saying that collision ...
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Why use subnet mask /30 for the internet port of the edge router? [closed]

In the following network, why should we pick the subnet mask /30 for the internet port of Edge Router 1? Since the wireless access point Edge Router 1 needs to connect to 3 hosts in LAN 1, a subnet ...
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3 answers
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How to learn IP addresses in a LAN

For communication with machines in the same LAN, hosts do ARP for translating the IP address to MAC address, which means, IP addresses are already known to each other. My question is, how does the ...
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1 vote
1 answer
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can't ping the WAN IP of a router

I learned to use cisco packet tracer and found something confusing but actually this is not about the cisco packet tracer . I'm curious if this apply in real network as well. So i tried building this ...
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Is fiber to computer(without the use of any other cables in between) possible?? Are any further developments getting carried out towards this goal? [closed]

All of us know well that the fiber to home(FTTH) connections are a trend nowadays. Every nation is planning to replace the existing metal wires with optical fiber cables. But we also see that the ...
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1 answer
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How can I set up two sub networks that can communicate by LAN but where only one has internet? [closed]

With only two routers, where one has a connection to the internet, is it possible to set up a second sub network that has no access to the internet, but where devices connected to either router can ...
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2 answers
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How does one determine what the default gateway should be in a multi-router setup?

Trying to set up a network with multiple routers, very similar to what's depicted in this diagram from the FreeBSD handbook: In particular, regarding this specific diagram, what should the default ...
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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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1 answer
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What exactly defines a WAN?

I've found this question but it doesn't seem to answer my question. What is the "technical" definition of LAN and WAN I know that a Wan consists of more LAN's together and MAN's and it's ...
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1 answer
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How Switch knows if the packet reached it's destination?

In a Lan connected using switch, For the first time if the sender sends a data to the destination, then the switch will send the data to all the devices in the network, and the devices will have to ...
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1 answer
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Does a receiver send acknowledgements after data received/failed in a bus topology and in ring topology? If so, how?

if in a bus or ring topology, is there any acknowledgement or error mechanism that if a packet is sent/or failed to receive/lost.
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How do switches handle network data if the destination computer is powered off in half-way?

Consider a lan network with a switch. Assume the switch has the mac addresses of all the devices in it's newtork. If the source computer sends the data to the destination computer through a switch, ...
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Lan and baseband channel

We know the baseband line at one time send or receive data(half duplex). If more than one host send data at same time may occur collision. In bus topology see the same thing. Inspite this in home, ...
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2 votes
1 answer
145 views

iSCSI with dedicated switches

Looking to purchase some dedicated 10GB switches for our iSCSI setup. Would the following setup allow us to use two switches for redundancy? Two VMWare ESXi hosts, each with 2 10GB NIC Storage with 2 ...
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can LAN port have multiple IP addresses of same subnet mask or different subnet mask

Can the router's ethernet interface have multiple IP's of the same subnet or different subnet mask? If yes what's the use?
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2 answers
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Losing connection when connecting a server to Stratix 5400?

I have a problem that when connecting a server to Stratix 5400 the Stratix loses connection for some seconds which causes a Safety Fault for the line because we have Safety PLC’s any help. ,Software ...
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2 votes
3 answers
70 views

Where is CSMA protocol really implemented?

I have multiple questions. Where is/were CSMA protocol really implemented ? i.e In our computer ? routers ? switch ? or which component ? is is s/w or h/w based ? Is it still used ? if not, which ...
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3 answers
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Is it possible to have a local area network with only layer 1 and not layer 2 of the OSI model?

I know the OSI model has seven layers. Can you consider a LAN to exist without layer 2 and just layer 1? The answers that I saw on Quora were not clear. Some of the answers on Quora came close to ...
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1 vote
0 answers
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Merge (and split) 2 different LAN in one Cable with VLAN? [closed]

I am searching for a way to connect two different buildings with one GB Ethernet Cable. On both LAN i have two different routers with different subnets that needs to be remain in the new building. The ...
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1 answer
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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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1 answer
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ssh: Could not resolve hostname (updating hostname for machine on local LAN) [closed]

I have connected a raspberry pi 4 running ubuntu 20.04 to my local LAN over wifi. From my laptop I can SSH to the raspberry just fine with: $ ssh ubuntu@192.168.0.47 Welcome to Ubuntu 20.04.1 LTS (GNU/...
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Using GNS3 to Sniffing Packets on Siemens RuggedCom RS900

I am using GNS3 to simulate an environment. I have 4 docker containers which all host Python programs. Three of the devices communicate with each other via the programs (Program 1, Program 2, Program ...
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1 vote
1 answer
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Will devices with static addresses, will be disconnected when DHCP Server is changed?

In my office network, the DCHP Server is set to 192.168.0.1/24. I want to increase the available pool, so I am thinking update the above setting to 192.168.0.1/23 in order to have: Network: 192.168....
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3 answers
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What kinds of organizations use routing protocols (aside from ISPs)?

I don't understand why would an organization aside from an ISP even use routing protocols. Let's say there is a big company with 5000 employees, and they want to have a network throughout their ...
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2 answers
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Setting up a secure LAN within an existing not owned LAN [closed]

Shown in the figure is a univercity network. The devices inside the red boxes are owned by the laboraroty in which I am working. I want to setup a secure subnet for all devices that are within the red ...
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2 answers
1k views

Connect two Ethernet network devices with fibre cable

Having an ethernet crossover cable it is possible to make a lan, connecting both devices directly with no need of a router or switch. Of course it needs some configuration. The question is: Is it ...
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1 vote
3 answers
131 views

What could go wrong if I use public IP range for intranet?

One of out clients is using a sub-network of 172.168.100.0/24 or
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316 views

Ping over WAN to LAN (and from server to hosts)

I have a network similar to the one shown at the picture below. The main aim is to get connectivity between antivirus server (10.100.10.9) and hosts placed behind their LAN-gateway (network 10.200.1....
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2 answers
2k views

Two routers on the same subnet - Possible issues?

What issues can occur when two routers are set to the same subnet (no cascading, both cable connected to the same switch)? For instance: - LAN: 192.168.1.0/24 - Router A: 192.168.1.254 - No DHCP, ...
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What environment is still using the Token Ring network?

I have struggled to find what kind of environment (Eg: Educational, Medical environment, etc) where the Token Ring network is still used in this present time and why are they still being used. It is ...
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0 votes
2 answers
64 views

Can computers connected within a Network via Ethernet monitor access the information uploaded/downloaded on a different computer

Suppose there are many computers connected within a Network. Let's take 2 examples. Computer A and Computer B, connected within the same network. Suppose, At the start of the day, say myself as an ...
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3 answers
4k views

Which is the best way to encrypt all the IP traffic in LAN?

I'm trying to encrypt all the IP traffic in a small LAN network but the in that network all kind of devices are connected i.e. PCs, Laptops, IP Cameras, IP Sensors, etc (new and old devices). I have ...
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1 vote
1 answer
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Will DHCPRequest get ignored by other computers?

I've been reading about DHCP and see that it uses limited broadcast to send its initial request to reach a DHCP server. I read about limited broadcast too which says it sends the message to every ...
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2 votes
1 answer
78 views

MACsec Switch-to-Switch authentication/encryption

I have some questions regarding MACsec IEEE 802.1 AE-2018 and PNAC IEEE 802.1X-2010. As I have heard there is no swich-to-switch protection with 802.1X-2010 by this standard I want to know where is ...
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2 votes
1 answer
120 views

Why must host A continue to transmit after host b sends runt frame post collision on ethernet? (CSMA/CD)

Trying to understand example from computer networks: a systems approach ... -Host A sends Host B a frame at time t; Packet arrives at B at time t + d; (d = one link latency) Instant before frame ...
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1 answer
328 views

RV320 router between 2 access points and secondary VLAN [closed]

I have a Cisco RV320 that is sitting between 2 different routers/access points on my network. Essentially: My ISP's router/access point <-----> RV320 <-----> My other access point My ...
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1 answer
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Removing VLANs from core trunks (.1q)....?

I am a little embarrassed I do not know the answer to this already, well I think I know the answer but I am not 100% sure and this I need to be 100% sure on. We have several core .1q trunks that we ...
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1 answer
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Will Main Router be overloaded in this scenario?

The Main router in my planned office network assigns IP addresses to all PCs through DHCP and also connects to the internet via GPON modem. 5 PCs and 1 server are connected to a 8 Port simple switch. ...
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2 answers
203 views

Pros and cons of using VPLS instead of using MPLS alone

What are the pros and cons of using VPLS instead of MPLS alone? What are the typical cases where VPLS is used?
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2 answers
2k views

Can I set up a WLAN with a WAP but without Internet?

I was able to set up a LAN with the following configuration : A main computer (Windows PC) with a DHCP and DNS server, who is configured to have a static IP address Three devices (embedded Linux) ...
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2 votes
2 answers
883 views

How does a host know the ip addresses of other hosts on the same LAN?

So as the title say, how does a host know the ip addresses of other hosts on the same LAN? Is there a specific protocol for this? My first thought was that ARP could be used. But ARP seem to take an ...
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2 votes
1 answer
1k views

Do two computers in the same wifi LAN communicate directly without the router? [duplicate]

I have heard (forget where) that in a local wifi network created by a router, when two computers communicate with each other, they communicate directly with each other, and their communication doesn't ...
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0 answers
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ARP traffic for devices in same LAN but different subnets [duplicate]

Given a LAN with 5 devices (a,b,c,d,e). Where devices a and b are in one subnet and d,e,f are in another. Will an ARP request broadcasted by a looking for device b reach devices d, e ,f as they are ...
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2 votes
2 answers
830 views

Clock Synchronization in a Network

I had a query in Clock Synchronization in a LAN.. If we already have clock synchronization in a network with the help of preamble field in an Ethernet frame. Why should we need still protocols such ...
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