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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55 views

What kinds of businesses have network troubles everyday? [closed]

Asking this question because I have no experience working with enterprise networks and I have no idea what kinds of network troubles happen and why these troubles happen. What are the nature of these ...
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Do you think Network infrastructure is a rip off of the customer? [closed]

I mean, studying the network infrastructure from the basics to ends, I don't see why switches/routers/firewalls should be so costly? They require tremendously less memory and the only thing which ...
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What is the main purpose of “enterprise network”, if not for communication? [closed]

Why do "large companies" need to build their own private network infrastructure? If the sole purpose is for internal communication, why not just communicate through internet? Why not use ...
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9 views

Exend network with a router as AP or with dhcp disabled [closed]

I have a modem/router on 1st floor from the provider and I want to extend my network on 2nd floor. I have ethernet cable from 1st floor to 2nd floor. What is the best way to do it? I have a router ...
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1answer
21 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
25 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
29 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
19 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
57 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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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 ...
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1answer
44 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 ...
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17 views

How to block one router from accessing network [closed]

Situation I have a network with two routers. Router A distributes internet to router B. Router A IP range 192.168.10.1 -254 Router B IP range 192.168.1.1 -254 Goal Router A should give router B access ...
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1answer
45 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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4 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
35 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 ...
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1answer
39 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 ...
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1answer
37 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
21 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
302 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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3answers
79 views

Is there a rigorous difference between a WAN and a LAN?

The main WAN (wide area network) of this world is the one named "The internet" although there might be others I don't know of. Contrastingly, there is no "main" LAN (local area ...
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0answers
21 views

Please Explain me traffic flow between two peers for ipse site-site vpn traffic , detailed traffic flow please [closed]

please explain me the exact traffic flow between two peers or gateways for IPSEC Site-Site VPN .Like phase 1 ,phase 2 , actual data processing traffic flow .
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9 views

How to find Best Fit Mask [duplicate]

How does i find the best fit netmask (i.e., resulting in as few host addresses as possible) for a network with 62 hosts in it? I don't have any class like A,B,C How can i find best fit netmask for ...
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1answer
15 views

answer packages rejected between mangle/prerouting and nat/prerouting

I am currently configuring a ubiquity edgerouter for our network. We have one uplink port (eth2) and two internal ports (eth0; with vlan 1) and eth3 (with vlans 2,3 and 4). uplink and vlan 1 have ...
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1answer
23 views

Wants to understand traffic flow of Catalyst layer3 Switch 3850 . what are sequence this switch will check to delivery packet to destination

i wants to know clear understanding about how Cisco layer3 switch checks in sequence order when traffic arrive to its L3 Interface . i want to know traffic flow in Cisco layer 3 switch ,because switch ...
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1answer
98 views

Confusion about Route based IPSEC site-site vpn and policy based IPSEC site-site VPN

I am confused about the major difference between a policy-based VPN and routed-based site-site Vpn
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1answer
24 views

How do I properly serialize a network packet [closed]

So I'm currently writing a program that is essentially just a server and a client. The idea is that I want them to be able to communicate with one and other by sending packets back and forth. And I'm ...
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2answers
83 views

Encryption between two switches [closed]

We have two offices located across the street and the distance allows us to keep everything in one LAN without going through the Internet. However, it seems to require some MITM protection, since the ...
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2answers
28 views

what happend when inbound traffics over the limit of bandwidth? [closed]

Sorry for my English. Let's say there is a chat server in AWS and it has bandwidth limit like 5Gbps. Someday, massive user comes and it spikes a lot of traffic in a second and finally it overs 5Gbps ...
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1answer
35 views

How can i set up a Wireless LAN to serve 20,000 concurrent devices [closed]

How can i setup a wireless LAN that can serve up to 20,000 concurrent devices. I am having a problem in figuring out if i need one router or several routers. A topology diagram with explanation would ...
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4answers
102 views

What exactly is “network automation”?

When we say network automation, what "automation" are we talking about? What is that being automated? I've heard that in network automation we do not have to configure each individual ...
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1answer
27 views

What are the benefits and drawbacks of NSPOF networks over SPOF ones? [closed]

NSPOF has redundant links and redundant network components, so I think the biggest benefit it has over SPOF is high fault tolerance and the biggest drawback is the high cost of buying and maintaining ...
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5answers
2k views

How does the shortage of IPv4 public IPs influence existing firewalls?

I came to know recently IPv4 public IP address pools are going to be exhausted soon. If IPv6 addresses are fully in use, all device vendors like Cisco, Fortinet, Palo Alto have to redesign their ...
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3answers
54 views

IS there any way to load balance traffic on both links configured with OSPF

Branch network is connected with DC through two point -point leased lines of different bandwidth . I want both links to be in active -active mode. How can use both link in active -active mode we are ...
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3answers
43 views

How communication is enabled in multiple different network using different routing protocols

I do have challenge in ensure communication between my organization and different stack holder organization connectivity as in my network we are using static route and vendors are using OSPF routing ...
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1answer
33 views

How loops appeared when skipped listening and learning state?

In STP convergence process, I just know that after a link failed a blocking port become listening state for 15 seconds then learning state for 15 seconds. I've read a CCNA 200-301 Guide explained me ...
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0answers
12 views

What can understand from (Rst ack) packet capture in wireshark [duplicate]

I am live troubleshooting traffic in riverside and when checking traffic logs (RST ACK) What is this mean is this default behaviour before closing session or session is getting rest from source.
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2answers
44 views

With private VLANS concept Vlans can be restricted and control same as access-list is private VLAN is enhanment for access-list

With private VLAN different vlan traffic can restricted and control . Even this we can accomplish with access-list configure my question is private-Vlan is enhancement for access-list or what ..
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3answers
94 views

But confused about SSL VPN and IPsec Site -Site VPN

What might be difference between sslvpn and site-site vpn . Which one among two is secure and it's significance
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1answer
28 views

What is difference between the native vlan and the default vlan [duplicate]

What is difference between Default vlan and native vlan it's always confuses me
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1answer
73 views

OSPF route advertising same subnet in same area 0?

Now: SW02 currently running OSPF area 0 with redistribute connected subnets which includes VLAN10 with another router/switches which isn't in the picture and not in the scope of this question; VLAN10 ...
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1answer
29 views

When traffic is intiàted from pc is ANDing process or ARP process start working first

When traffic is initiated from desktop which process starts first; the ARP process or ANDing process?
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2answers
61 views

Can we use both RSTP and MSTP spanning tree protocols in same network

I have network connecting with 500 users and 50 servers connecting different layer3 switches and layer2 switch. Can i run rstp in few switches and mstp on remaining switches.
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2answers
99 views

Standards for network design / installation diagramming in CAD

Ok, So I know this is a strange question and might be off-topic, but I really do not know where is the best place to ask it ( and where better that a SE site of network engineers / designers ). TL;DR ...
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1answer
27 views

routing a network with 2 interfaces and vpns [closed]

I'm pretty inexperienced in network but here is the idea of what i want to do: I have 2 interfaces: Interface #1 = fast internet Interface #2 = stable internet with static ip address this is the ...
2
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1answer
56 views

Do switches allow parallel connections?

I am new to networking and not from Engineering domain. Sorry If I sound silly. I came across an article on Network Switches and How they work. Diving deep into it, I found some interesting topics ...
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2answers
64 views

How can i optimize this network

I got a router on a stick and I want to optimize it by reducing its cost and also the configuration costs This topology is to facilitate inter Vlan routing so Vlan1 can communicate with Vlan2. PC0 and ...
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1answer
33 views

How a wifi AP handle packets

Computers are connected to a wifi AP. The wifi AP is connected to a L2 switch. A server is also conected to this switch. When computers sends packets to the server, how the wifi AP manages the paquets?...
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1answer
59 views

Network Protocol vs Framework?

I've been a network engineer for almost 4 years now. I thought I understand what a network protocol means. but now I'm having doubts. For me, Ethernet is a protocol used at layer 2. there would be ...

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