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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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16 views

Cisco 3750G alternatives without routing function [on hold]

I need some alternatives for cisco 3750g routable switch. It's kinda expensive, is there anything like cisco 3750g just without routing function? I'm gonna use it for whole building, with 4 floors, +-...
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0answers
14 views

Setting up a LAN using laptop [on hold]

I'll be going to a place that doesn't have internet nor a router at all and I wanted to work on my website which I run using Apache (WAMP). Is there a way I an use my laptop to make a LAN just so the ...
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0answers
18 views

pfSense: Route traffic from LAN to OpenVPN client

I have set up OpenVPN on pfSense, and it works almost the way I want it. The client connects to the pfSense box from the WAN, is assigned a tunnel IP and can communicate with all the networks on the ...
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3answers
57 views

How does a computer know IP address of a computer on another network

I was watching a video explaining ARP, which was explained really easily but I got confused when they said that Host A already knows Host D ip address which is on another network. Host A and B were ...
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0answers
9 views

IPIP channel strange behavior and bonus question [on hold]

I have two networks connected by IPIP channel. DNS server for BOTH networks is accessible on Network B Network A has large number of DHCP clients. Those clients are using DNS server (which is ...
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0answers
37 views

What will happen if an IPv4 packet’s total length field exceeds the packet’s actual length? [on hold]

If a router or a host receives a packet, the value of "total length" field is larger than the packet's actual length, what will the router (or the host) do? Below is a sample, I edited a packet, then ...
2
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1answer
31 views

What “32-bit boundary” means?

As a non English speaker, I'm not sure to understand this sentence : "Padding bytes are added at the end of the Packet Data Field to align the Packet Data Field to a 32-bit boundary". For me, "...
5
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2answers
55 views

Network Switch Power Isolation

I run a small office network that uses TP-LINK T1600G-28TS (TL-SG2424) JetStream switches. The office is across two buildings, each fed by a different phase of power. We've recently installed HD ...
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0answers
9 views

What's the difference between 'ajax' request and 'http' request? [closed]

Since I am new to web networking, I am confused about the difference between 'ajax' and 'http' request. What's the difference between those two and are they on the same par?
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0answers
15 views

Looking for a Suggestion on Best Agent-less Network Mapping Tool [closed]

Currently i am part of the security team where we are looking for a network Mapping tool which can identify Active Flows and Active Connections. We have around 5000 + Nodes (Firewalls, Servers, ...
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0answers
8 views

Must ssh into server and ping to revive connection on 2nd network card [closed]

have a file server, call it a NAS - it is running sshfs ssh, samba and an ftp server. NAS is connected to a wireless network and a separate wired network. If a client on the wired network connects ...
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0answers
25 views

How to design a network layout? [closed]

I've got to put together a network layout design- for my apprenticeship- of my business. I've done a couple of layouts in the past but nothing particularly complicated, can someone please help me? :) (...
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0answers
13 views

Netowrk devices syslog [closed]

hey recommend me best syslog software and service for Networks devices and servers . I want to get the logs of servers and network devices for troubleshooting. In my network many cisco switches , ...
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0answers
14 views

Blockchain public network [closed]

0 I would like to ask about blockchain network from programmer point of view. How could I create P2P network that is public? What I need for that? I was able to create local network where I can ...
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0answers
11 views

I Need Help with RIP Routing [closed]

I am really new to networking and I am taking an online class without recorded classes... I was wondering if i could get some help with this problems and a little explanation with it... I kind of get ...
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0answers
9 views

3 devices with same IP address and Port address broadcasting UDP packet needs to be receive by one computer [closed]

I have task to connect three same Multicast IP address devices needs to connect one PC to collect UDP packets from all three devices. need to write python script for collecting data from all three ...
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0answers
9 views

How can i solve Byte Stuffing given FLAG and ESC [closed]

I have Computer Networking in my CS course. I'm stuck on this problem and i can't seem to find a formula online. I want to know how can i solve given an array of characters and given FLAG and ESC what ...
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1answer
41 views

Network IP questions [duplicate]

Suppose I have a network with IP address 192.168.10.1/16. This network can hold up to 65536 machines, from 192.168.0.0 up to 192.168.255.255 (65534 machines without the network ID and broadcast ...
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1answer
26 views

locally vs universally administered MAC address? [duplicate]

Difference between locally and universally administered MAC address? What is the purpose of locally administered MAC address?
3
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1answer
32 views

VLAN VoIP and LAN configuration over multiple switches

Some background: I currently have: Switch A Main 48 port 1Gbps (DLink) Switch B 10Gbps Backbackbone (DLink) Switch C 24 port 1Gbps (DLink) Telephone Switch 1-24 port phone switch connected to a ...
6
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4answers
630 views

Abstract language to describe network deployments?

Is there any more or less standard/spec that is, vendor neutral, for network configuration language? Say, a VPC with networks and virtual machines would become an XML or JSON file. Something like, &...
1
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2answers
39 views

Why are proxies implemented on the application level of the OSI model?

Why are all proxy servers implemented on the application level of the OSI model, and not the network level? Is it possible to implement a proxy server on the network level? Such as on the gateway ...
0
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1answer
38 views

If a router doesn't know where to send data what 2 options does the router have?

Looking back at some notes i've been making while going along trying to learn for ICND1 (still very early days), I have this question which I found while trying to quiz myself "If a router doesn’t ...
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2answers
34 views

Switch virtual interface

Single SVI can be mapped to a VLAN. When configuring VLAN on SVI, are there any fix no of subnets can be assigned to a single VLAN? maximum number of VLANs can be configured on the switch =4094 ...
2
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2answers
165 views

Cisco 899G-LTE Cellular 0 interface in spoofing mode

I have a problem. After I've reseted my router configuration it doesn't get IP from LTE SIM card. Seems like my celullar0 interface is in spoofing mode. > Router#show interfaces cellular 0 ...
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2answers
37 views

Make devices visible under Access Point

In our network, all wired PCs have a direct access to internet (83.XX.XX.XX) and a secondary IP address on the same NIC in order to access a subnetwork (192.168.10.XX) with wired peripherals (scanners,...
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0answers
22 views

ShrewSoft VPN client not working over IPSEC VPN tunnel

I have a IPSEC VPN tunnel between 2 locations. From Site A we are allowing the VPN range of 192.168.2.0/24 over to Site B. When users use the AnyConnect client they are able to connect successfully ...
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1answer
49 views

How to Troubleshoot Network Latency Step by Step

Does anyone have an idea of how to troubleshoot high network latency step by step? For example, let's say we have a remote office. And all users are from that office are having high latency accessing ...
-1
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0answers
12 views

I have a question about how to calcul IP rangre [duplicate]

If the network address starts with 16.27.24.0 and we need to create 4 subnets, hosting 17, 5, 300, and 25 computers, what should the subnet IP ranges be?
3
votes
2answers
80 views

How does a TCP segment fit into a smaller IP packet?

The IP protocol can handle fragmentation and it includes the fragmentation offset and identifier. I know this comes into play when your IP packet is too big for some specific network or link where the ...
20
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6answers
5k views

What stops someone from configuring their network with IP addresses they do not own?

Here's the scenario. I was picturing a university that bought a range of IP addresses. I think they'd still be inside a ISP (right?), but they'd have freedom to configure stuff the way they wanted. ...
0
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2answers
55 views

Importance of DHCP option 12, client host name

The main purpose of a DHCP server is to provide dynamic configuration for a group of hosts (mainly IP, Gateway and DNS). There are several options that can also be sent. Option 12 (client hostname), ...
11
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8answers
5k views

Why are IP addresses given to each interface and not device? What would the implications of that be?

Why do we need to give IP addresses to each interface? Wouldn't giving one to each device be enough?
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0answers
57 views

Help with network setup issue (small network)

I am trying to set up a new network for a small business, and I can’t figure out what I have misconfigured. Hoping someone can provide me with some ideas. I have 6 VLANs set up. 10.10.10.0/24, 10....
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1answer
42 views

What does the speed of Network Switch actually mean?

Network switches usually come in speeds of 10/100/1000 Mbps, and that's all fine and dandy, then I got thinking.. Suppose I have an 8 port 1000 Mbps switch, each port connected to a client. If a ...
1
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1answer
43 views

Can a machine be its own DHCP server for another interface?

I was wondering if a single machine (with several network interfaces) can be, at the same time, a DHCP server and a DHCP client, that is the server would dynamically attribute an IP address to an ...
0
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1answer
20 views

How to connect separate physical devices to same virtual network in VMWARE [closed]

I am trying to create a vitual active directory network at home. I am trying to do this in VMWare. I have 2 actual physical computers. Here is the plan: 1st Physical Machine: Using vmware create the ...
0
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1answer
35 views

Can not add a Physical port into LAG

Using SuperMicro network module, which related to Intel SDN product, the command PDF . and the Web GUI manual. there I have qe57, qe61, qe65, qe69 four upstream ports, I want to aggregate them to one ...
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0answers
24 views

How to set the network module port to trunk?

I use the SuperMicro network module, which use Intel SDN product, the command PDF . and the Web GUI manual. Now, I want to make the qe57 port to a trunk mode, but I don't find a command to set. 192....
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2answers
60 views

Help with non-profit network

Our church network and 10 security camera system is is run by a i5 2500K - 8 GB memory with an AMD 5570 HD graphic to one monitor and the onboard Intel HD 3000 chip to a second monitor. The current ...
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0answers
18 views

How can I convert a switchport virtual interface to layer3 interface in ONS?

I use this Networking System(ONS): I help interface, get bellow information: there are mgmt-ethernet, port-channel, and range. In the port-channel I add a virtual interface 3801, but how can I ...
0
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1answer
16 views

Cisco ASA 5506 log collection after power cycle

Today we had to power cycle our Cisco ASA 5506 , since I could not connect to it through any of the connected interfaces. How can I get the logs to see what failed or what was the state of the ASA ...
3
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3answers
123 views

Cisco ASA logging to remote syslog question

I have Cisco ASA and i have setup graylog logging server and i am seeing no logs coming on remote syslog so this is what i did.. Current config: asa-fw1-010101-2-7/pri/act(config)# show run logging ...
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0answers
21 views

Network Video Buffering [closed]

We are facing some issue in our office internet. We are using Airtel 80mbps as an primary WAN link. When we play Particular live video channel from device, say name as A, the video is buffering more ...
0
votes
1answer
73 views

WAN/Campus network design - Learning purposes

I am trying to build a WAN connecting various LAN's via frame-relay for learning purposes, i do not have that much experience with frame-relay or network design (mainly creating LAN's and connecting ...
0
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1answer
32 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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1answer
33 views

what is pump conversion efficiency?

I am reading an article about Optical Fiber amplifier and i saw the term pump conversion efficiency. Do you know what this mean ? I have seen on the internet that energy conversion efficiency is the ...
0
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1answer
66 views

Add ports on Packet Tracer 7

how do you create new ports using WMIC-4ESW on my routers on packet tracer 7? both of my routers have 2 GigaEthernet and I used them because my 2 networks on each router. I need to be able to add more ...
1
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1answer
26 views

Quanta switch not resolving addresses

I've got this brand new Quanta T3048. I've configured the VLANs we need but it came to my attention that the switch won't resolve any address even though I've set it (according to the configuration ...
2
votes
1answer
50 views

Routing and Switching & network monitoring

hi i am facing problem in juniper switch Model: ex4200-48t ,Junos: 15.1R6.7 . i deploy network monitoring check-MK software. there is showing errors of juniper switch ports and also show in logs file ...