Questions tagged [network]

For questions about Networking that includes design, and use of a network, the physical cabling, hub, bridge, switch, router, and so forth. Anything in relation to networking and its technologies.

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Cannot connect to a computer after bringing up a second NIC [closed]

I have a computer on campus network which I can access from outside via a ssh proxy server. home --> proxy --> my computer The computer has a second NIC so I brought it up to connect to some ...
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1answer
22 views

Linux networking + mix of auto-negotiation of yes/no [closed]

we have 10 servers with Advertised auto-negotiation: yes as the machines with driver driver: i40e driver: i40e version: 2.3.2-k firmware-version: 10.51.5 expansion-rom-version: bus-info: 0000:12:00.0 ...
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10 views

High-density IoT solution [closed]

The environment: Industrial warehouse. 200 custom Arduino ESP32. Router: ASUS RT-AC68U. Access point: Ruckus 9U1-R510-WW00 Issue: High reconnection rate for the Arduino devices. Initially, we only ...
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1answer
40 views

Ping to default gateway failing

I am trying to ping to a default gateway which i have configured as 171.2.0.1 but somehow the ping is failing . I am new to network domain so i have less idea about it . Any help is appreciated .This ...
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How can I reserve a static IP address for my PC on a TPLINK Wireless N ADSL2+ Modem Router? [closed]

I am trying to add a static IP address for my PC. I have tried to search on Google, and I got on this page on TP-LINK official website. Unfortunately, the screenshots in the article shows a very ...
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how attackers make DNS servers for router DNS hijacking? [closed]

some attackers take over the router and reconfigure the DNS settings, , and re-routing traffic to compromised DNS servers. how attackers make DNS servers for router Dns hijacking?
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9 views

how to continuously send packet to specific WiFi channel without connect to any APs? [closed]

I am doing a project called 'Device free wireless sensing through WiFi'. In the literatures, researchers using PC and WiFi routers to send and receive packet, the channel state information (CSI) can ...
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7 views

Confused in what maximum number of hosts and maximum number of subnets mean [duplicate]

Given a 172.12.0.0 /16 to be subnetted to appropriate networks. Branch 1 has 80 hosts, Branch 2 has 31 hosts and Branch 3 has 75 hosts. I've already made a subnet table based on these using VLSM: ...
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Someone said I am being hacked. Were they right? [closed]

I paid an ethical hacker on a freelancing site to try and find evidence someone is hacking into my computer. He came to the conclusion my router is hacked, because a Huawei device, a certain IP which ...
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How can I speed up game or force all network to make better network speed? [closed]

Whenever I play game, I check the Task Manager and network session shows 0.4Mbps but when I'm watching something in Amazon Prime, network session shows 11.5Mbps. Is it possible to change some ...
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3answers
77 views

What are the administrative procedures for moving the geographic location of a network?

Original Question Suppose that Alice operates a website hosting business in Maine. She has a warehouse full of servers to which a /28 range of public ipv4 space is routed (call it the W.X.Y.Z network)....
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How to develop a new protocol? [closed]

I'm a certified CCNA, web developer and a programmer(I code in Java & python mostly). Although that I understand the concepts of networking I want to expand my knowledge further and code a ...
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6 views

Why does my WiFi tab always missing in network and internet? [closed]

Where is my WiFi tab under Network&Internet? The picture It always missing whenever i connect to wifi. Here is the picture Before i use my internet . The Wi-fi tab is present. Im using ACER ASPIRE ...
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0answers
9 views

Network controller showing 3 different transport id [closed]

There was a problem with my network controller so i opened up cmd and started to check for interfaces. I noticed a strange thing that my Wifi network controller had 3 different Device ID (Transport id'...
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7 views

Are the mobility of the nodes lead to packet dropping in MANETs? [closed]

As we all know, lots of reasons can lead to normal packet dropping in MANET networks, e.g., unstable wireless channel, overloaded nodes, and so on. I have a question about whether the mobility of the ...
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1answer
108 views

GNS3 switches vs Real switches performance

I want to emulate the performance of switches in GNS3, and the focus is not the configuration of switches. My questions are: Do emulated switches perform worst than actual switches? Are emulated ...
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1answer
56 views

BGP (RIB-Failure - Higher admin distance)

I tried to make BGP routing on this topology .. After that I added 200.200.10.0 network and 200.200.20.0 network in R1, I had rib-failure (higher admin distance) on R2 and R3 .. but I was able to ping ...
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2answers
30 views

How to Balance SPAN Traffic from Redundant Switches

So we are wanting to deploy an IDS device to capture EAST-WEST traffic in a LAN. The actual topology is more complicated but our issue boils down to this: We are attempting to configure SPAN sessions ...
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29 views

Is there any logic to how IP address topology is organized globally? [duplicate]

IP addresses are designed as 4x8 = 32 bit identifiers, 000.000.000.000, representing a hierarchy of organization. Each level in the hierarchy can store 2^8 = 256 networks. In theory, this design can ...
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51 views

Untagged VLAN in EVPN+VxLAN

I am dealing with very strange issue but wanted to check with experts if i am doing anything stupid or not. I have small size EVPN+VxLAN clos network (OSFP+iBGP+Multicast+Arp-suppression (no ...
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21 views

Mistakenly added switch configuration on Cisco router 2951 so now it is showing gibberish data on CLI

I have Cisco 2951 router in which my colleague mistakenly uploaded switch configuration from tftp server. Now it is showing gibberish data on CLI when it boots up. I tried to get into the ROMmon mode ...
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1answer
21 views

Intermittent network failures on unmanaged switch [closed]

So the setup first. I've got MikroTik rb3011 as my gateway with one WAN and other ports in bridge. On the MT bridge I’ve got two switches. one is cisco sg300 and for the building nearby there is ...
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47 views

EVPN VxLAN arp suppression TCAM carving

Deploying Clos design network using leaf Cisco Nexus 9396PX and when trying to configure arp-suppression using tcam carving getting this error Free up tcam slice from VACL (default vacl tcam is 512) # ...
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1answer
32 views

By General Convention if we say the Frame size is 1KB do we take it as a 2^10 Bytes or 10^3 Bytes

In my academic we generally follow 2^10 Byte approach , I m really at loss is it by convention only at my college or something which is accepted widely
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1answer
32 views

How to connect to a machine which is sitting behind NAT router?

I have a server that needs to push a message to a client from which it received a request a few days ago. Now request which was received has the IP address of the NAT router behind which the client ...
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1answer
39 views

Networks theory: Layers, Services and Interfaces

I want to learn about computer networks from the bottom up. I don't really understand the nuances of networking layers, with books mentioning that layers provide services to layers above them, but the ...
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2answers
165 views

Is it possible to filter directly connected networks redistribute with BGP based on a peer basis?

Assume a simplified case in which router R1 is connected to two BGP peers: one eBGP peer and one iBGP peer. Is there a possibility to advertise directly connected routes only to one of them ...
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2answers
36 views

Physical mapping of ethernet plugs

I work as a cybersecurity consultant. In a shadow-IT devices hunt, we noticed a few unwanted devices plugged on the network. However, even with its MAC address and IP, there is no way for me to ...
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2answers
36 views

Is Bluetooth's BD_ADDR a unique identifier?

In the course of building a system controller: the context is that users have a modern Bluetooth smartphone with the Bluetooth on. I suspect that BT is broadcasting a unique identifier: a raspberry ...
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0answers
17 views

Can I use a wireless access point (or two) to extend my existing wireless network? [closed]

In large commercial buildings I typically see several ceiling mounted Wireless Access Points. When moving throughout the building, I do not have to continually reconnect to different networks (or ...
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1answer
25 views

Do we represent software in network physical diagram?

I am working on creating a wireless infrastructure for a production site and as I am creating a physical network diagram representing the structure of devices, subnets etc. in the network diagram. So ...
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2answers
44 views

Routing infrastructure doubt. It is a functionally design this?

I have design the following network diagram, but I cannot figure out if it could cause some issue on the network: Some detail about the infrastructure: Network connect Ext rtr A, Int rtr B and C is ...
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0answers
22 views

What are the good hardware, software and equipment's suggestions to set up a wireless infrastructure? [closed]

I am working on providing wireless infrastructure suggestions to a client like what software, hardware and equipment will be required to a client in order for them to set up the wireless ...
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0answers
21 views

Endianness of Ethernet Frame in cable, which is correct? [duplicate]

I just learned about the endianess of ethernet frame. Bits in byte are in little endian, but bytes are in big endian. e.g EtherType 0x0800 in cable: 00010000 00000000 Decoding order: <------- <...
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1answer
23 views

Are there broadcast/collision domains on non-Ethernet networks?

What if we have routers or hosts connected via ATM, Frame Relay, or SONET; that is, what if we have IP over SONET, IP over ATM, IP over Frame Relay, etc., do we still have broadcast domains and ...
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1answer
28 views

Unstable network performance within the same facility

Asked this question previously, but it wasn't as detailed as this. I had my network speed improved by my ISP, I tested the network speed from the Fiber media converter, the speed was awesome, tested ...
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1answer
49 views

Do all devices which use Wi-Fi (802.11) use CSMA/CA?

I know this is quite trivial, but I just want to know if all devices which support Wi-Fi through interface cards/hardware (like laptops/PCs/phones..etc) use CSMA/CA irrespective of their router/...
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2answers
21 views

How to find the client's application port during communication [closed]

After reading firewall rules about inbound and outbount I have some questions and the most sources focus on the server's ports. What happens to the client side when is trying to make a connection to ...
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3answers
61 views

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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0answers
17 views

Multicasting with Layer 3 Switches [duplicate]

I was wondering if someone could advise on this please - I want to set up multicasting on a network of layer 3 switches. So I understand I should enable ip igmp snooping on all the switches and then I ...
0
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1answer
55 views

How is a video calls bandwidth reserved on a wifi network?

All the older versions of Wifi, except for Wifi-6, give each device on the network the entire bandwidth /highway no matter how small the amount of data it needs to transfer. Can someone explain how ...
2
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1answer
59 views

IPv4 and UDP/TCP packets inside of ICMP packet?

A week ago, after opening wireshark, i was surprised by seing a storm of ICMP packets from different IP addresses. While deep analysing of thoses packets, i noticed that those ICMP packets contains ...
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0answers
5 views

IP address, network ID, host ID and subnet ID [duplicate]

I am studying a course about computer networking and again I stumbled upon a section that raised a question. I found very helpful people in this forum and I hope you can help me once again. During the ...
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1answer
36 views

allow 2 machines to communciate each with their own network? [closed]

2 networks. Network 1 local and i want to be able to receive and send information to network 2 which is at a remote site, branch site. How do i go about connecting both networks so that both machines ...
0
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1answer
43 views

What if receiver changes its IP address during the transmission process?

Suppose I am sending data to a laptop with IP address say x but before data could reach its destination the laptop is moved to another network and now its IP address becomes Y. Will the receiver still ...
2
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1answer
38 views

what is significance and role and function lifetime in IPSEC Site to Site VPN . Please explain importance and role of lifetime in VPN

I Came across incident where i need to troubleshoot IPSEC Site to Site connectivity issue . The term "lifetime" confuses me . please anyone explain me importance of lifetime in VPN . Whats ...
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1answer
46 views

Access IPSec site from another IPSec site

Our company delivers, installs and maintains custom build hardware at customer sites. In all cases the delivered setup contains at least 1 server and 2 network devices. To keep the control over the ...
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1answer
21 views

Propogation delay vs time required to send out a complete frame on channel

I was reading Data Communications and Networking by Behrouz A. Forouzan in which for simple Aloha protocol the vulnerable time given was T(fr) (time required to send out a complete frame on the ...
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3answers
337 views

Routing between completely separate private networks

I’ve got a request from a partner vendor in a completely separate routing domain to directly route a /24 rfc1918 network on my rfc1918 internal network. The proposed solution has their handoff ...
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0answers
33 views

What are difference between SSL VPN and IPSEC Site to Site VPN [duplicate]

I am little confused between SSL VPN and ipsec site to site VPN packet flow and authentication methods and moreover what are significant difference between two VPNs . As per my understanding IPSEC ...

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