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Questions tagged [lan]

For questions about Local Area Networks (LANs).

1
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1answer
18 views

Can't ping across router with two interfaces [on hold]

This is the topology I'm working with. In the router, e0 is ether1 and e1 is ether2. LAN_A has a maximum of 96 clients. LAN_B has a maximum of 48 clients. VPC_LAN_A: ip 192.168.10.1/25 192.168.10....
0
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0answers
21 views

How to have ethernet connection in my room when my living room [on hold]

My router is in my living room, it has a LAN cable connecting from a data point in my living room to the router. Now the problem is, I want to have ethernet connection in my personal room (which has a ...
0
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0answers
9 views

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

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
1
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2answers
41 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?
2
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2answers
551 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?...
5
votes
2answers
812 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 ...
0
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2answers
39 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
votes
1answer
70 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 ...
1
vote
1answer
2k views

Beginners Guide to VLAN with Netgear & Ubiquiti HW VLAN101?

I've got a few questions related to networking, more specifically VLAN'ing. I've got a Gateway/Router - Ubiquiti USG I've got a 48Port Netgear Switch - Netgear GS748Tv5 L2+/L3 Lite I've got 5 ...
2
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5answers
26k views

How can 2 computers in different network communicate?

Suppose my friend and I are connected to the Internet via some local ISP (not necessarily same), which means we are on different networks, hence our computers have different private IP addresses. Is ...
3
votes
2answers
57 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 &...
1
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1answer
62 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 ...
1
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2answers
26 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 ?
1
vote
1answer
74 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 ...
-2
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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 ...
2
votes
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 ...
0
votes
1answer
57 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 ...
0
votes
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 ...
1
vote
2answers
83 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 ...
3
votes
1answer
1k views

Spurious restransmission to a server behind pfsense NAT

i'm trying to connect to my ssh test server that i setup behind a pfsense firewall via nat on port 22. When I sniff packet on my laptop (WAN side of pfsense) trying to connect to the server, SYN is ...
0
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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
165 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 ...
2
votes
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,...
1
vote
1answer
90 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 ...
1
vote
1answer
574 views

Add a router with dhcp to existing lan and create a secondary private network [closed]

I'm not a network guru. I have had this scenario a few times at a hackathon or small event for technical people. There are usually a group of 50-200 but with an average of anywhere up to 4 devices per ...
3
votes
2answers
271 views

Ethernet wiring job done wrong

I am a systems administrator by trade. Though I have done a few wiring jobs, this is not a task that I claim to be a professional at, either by training or experience. However, ethernet wiring isn't ...
0
votes
1answer
2k views

Can two routers be in same IP-range? [closed]

I'm having a modem with a built-in router, that connects to the internet through the 4g-network (productname: Huawai). To this modem, I have a router connected in Lan1 (productname: ZyXEL). So my ...
5
votes
1answer
78 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 ...
1
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3answers
179 views

What are the minimum requirements to be on the internet?

People often define the internet as a network of networks but this is wrong. If I connected two LANs together that wouldn't nesecarilly be on or part of the internet. In class we learned about ATM, ...
2
votes
1answer
57 views

What's the technical name of this slotted type of RJ-45 connector?

What's the name of the type of plug that has the little thing on the side that prevents it from fitting in regular 8P8C sockets? Thanks!
4
votes
2answers
1k views

Full Duplex and Collision Domain

I have a very basic query on Collision Domain and Full Duplex Mode. There are two types of logical topology: Ethernet and Token Ring . Whenever we read about Ethernet the first thing that we are ...
6
votes
1answer
1k views

How does priority work in token ring?

Token rings have an optional priority feature, for which the 8 access control bits in the token ring non-token frame are used. Suppose we are working with the delayed token reinsertion scheme. How ...
2
votes
1answer
412 views

Do different nodes on a LAN share a public IPv6 address?

I looked up the public IPv6 addresses on google for two devices on my LAN, and the addresses are unique (only the first 64 bits match). I thought that the router connected to the internet has a ...
3
votes
1answer
501 views

Network Diagram for IPv6 LAN

From what I understand about IPv6 networks, since NAT was a hack to deal with a lack of IP addresses in IPv4, NAT is a possibility, but not a requirement in an IPv6 LAN. So taking this into account,...
1
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2answers
4k views

Connect a LAN cable to LAN1 & LAN2

I connected a LAN cable from the LAN-1 port to the LAN-2 port owned by the same router. Then really weird things happened: For 10 - 15 seconds, nothing happened, none of the lights on the modem are ...
2
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2answers
211 views

What can I do with a crossover ethernet cable?

Is the file sharing of two PCs, connected with a crossover cable, both directions or only one? Would I be able to connect to a PC and play LAN games over this mini-network? Would this be extremely ...
0
votes
1answer
52 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
votes
3answers
517 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 ...
4
votes
1answer
766 views

Is it possible to assign each vlan to a physical port on the ZyXEL USG40?

I'm trying to configure a ZyXEL USG40 to act as a switch that can physically separate 3 vlans from each other. I was told this product would be sufficient to setup a company network with 3 separate ...
0
votes
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 ...
5
votes
3answers
1k views

Why do we use VLAN?

According to my understanding, the network switch will look out for the specific MAC address and then it will forward the frame so basically it doesn't broadcast the frames then why do we make VLANs? ...
1
vote
1answer
459 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 ...
2
votes
2answers
301 views

serial Connecting two network wall sockets

First of all, I am not a network engineer, and my knowledge of physical network installations is quite limited ( I am a programmer ) , so please excuse me if my question is too trivial / naive / ...
15
votes
4answers
5k views

Why is the CAM table in a switch called CAM table and not MAC table even though it holds MAC addresses?

I know the CAM table in a switch holds MAC addresses and the ports that are associated with the respective MAC addresses. There are no such thing as CAM addresses from my knowledge, so why is it ...
0
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2answers
620 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 ...
0
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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 (...
5
votes
2answers
946 views

Speed benefits when switching from 1Gb copper LAN to Fiber Optic

We are trying calculate how will the network performance improve when we switch from 1Gb copper LAN to Fiber Optic. We have 5-20 people simultaneously working on a Server via the 1Gb LAN. There are ...
1
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2answers
161 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 ...
1
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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 ...