Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

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Describe what happens at every step of our network model, when a node on one network establishes a TCP connection with a node on another network. You can assume that the two networks are both connected to the same router.

Please include a detailed explanation of the following:

Physical layer
Data link layer
Network layer
Transport layer
MAC address
IP address
TCP port
Checksum check
Routing table
Cloud Class® Course: Microsoft Windows 7 Basic
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Cloud Class® Course: Microsoft Windows 7 Basic

This introductory course to Windows 7 environment will teach you about working with the Windows operating system. You will learn about basic functions including start menu; the desktop; managing files, folders, and libraries.

How do MongoDB and Active Directory go together?

I have a small bit of exposure to MongoDB and  Active Directory as well. But is there so synergy of using them together?


How do I automatically back up Outlook files?   I am using Outlook 365 Business.   I want to back up the data files automatically on a NAS on my network.
Hi Experts

Could you point how to obtain the maximum speed of my PC's network card?

I don't know is it.

Thanks in advance.
How to track a computer
If you use a VIF - I understand you can attract all your S3 traffic over the Direct Connect circuit instead of going to the public internet. Is the full set of addresses to be used for S3 published anywhere so that we could create the right set of BGP filters to make sure that only the desired S3 traffic gets attracted to the Direct Connected instead of just going to the Internet?

Currently the path from our internal hosts to S3 storage is via the Internet to Amazon public IP. The goal is to get that traffic to go over our Direct connect circuits. I believe the method is using VIF and then those addresses get advertised via BGP over the DX. I want to filter those routes so unintended traffic doesn't go over the direct connects.
hi guys

I've got a WYSE thin client terminal. To the back of this terminal is attached a USB Skorpio scanner. On the device manager of this thin client I can see the scanner on there.

I'm using RDP on the thin client to connect to a virtual machine on our network. I would like this USB Skorpio scanner to get picked up. It isn't at the moment and I don't know whether I am supposed to do anything? I was told this WYSE thin client supports USB passthrough.

Any ideas on any changes I have to make on the virtual machine?

Thanks for helping
W2K DC in small production environment, 20 pc's, about 3 people are able to connect their laptops as "workgroup", they can access internet no problem, Can W2K harden this private network or do i need W2003 Server Ent, 2008, 2012 etc?

Yes there is a domain setup in active directory. All workers login in their own accounts.
Yes I am in rush process to upgrade.
Hi Experts,

I have a Win 7 Pro computer that I named Optiplex, with 2 physical hard drives - C: and D:.  D: being my main Data drive.

From this setup, for many years I'm sharing 4 printers, 5 folders from D: and 2 folders from C:.

All of the sudden, I cannot access none of the shares.  When I go to \\Optiplex I see all my shares, but when I double-click on any folder I get an error Windows cannot access \\optiplex\folder - under details The network path was not found. This also happens when I try to navigate from the Optiplex itself. However, I am able to navigate directly through D:\folder\another_folder.

Any help will be greatly appreciated.
I have two domain controllers pointer to each others via DNS, All clients point DNS to one of the DC's. If the DC are paused, clients can't access internet (ok good so far)

The DC (again) are pointing to each other, how the heck are the DC able to access the internet then? (Again, there are no outside DNS numbers entered in.
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I have 5 computers. 3 are Windows 10 and 2 are Windows 7. I am trying to set up networking across my machines. I've started with 2 Windows 10 and have enabled networking on them and have removed the requirement for user name and password. My main machine doesn't see the other machine or vice versa. My machine no longer has a homegroup as per the latest Windows 10 update. The other machine does but I would rather not use it since it is going away.  What do I need to do to correct this problem?
From a best practice standpoint which is better, ASA on the edge or a router on the edge of your network?

off of the top of my head ASA on the seem like a better design, however, I have seen some networks in the passed with Router(Edge) then ASA.
We moved a computer from one location to another (different IP) and everything is working except it cannot find any network computers.

I can ping them and the computers can ping the new computer.  It has the proper IP, Subnet, and DNS.  It has internet.

What am I missing
Browsing to from internet explorer shows an invalid certificate.
Firefox on the same machine shows everything is fine

Date/time are correct
Firefox and Internet Explorer show the exact same certificate by serial number and thumbprint
There are no proxy settings or proxy programs in internet explorer or firefox
There is no upstream content-filtering appliance
Only happening on one machine on a network of 30 other machines

this machine pings as
unaffected machines ping as the same

What gives?  I haven't seen a false positive SSL warning which couldnt be explained by something easy like the things above

How can firefox trust the same cert which is untrusted by IE on the same machine?

The affected machine is Server 2008 R2 running IE 11 and FF 60.0.1

screenshots of IE and FF certificates
I ran into a very unusual problem this week.  A client called to note that their network / Internet connections were very slow on one computer.
The server is Windows 2008 R2 and the computer is Windows 7.
On the computer, I tested pinging and ipconfig and the replies from both were VERY slow, 15 to 20 seconds for the reply to come back.
I updated the BIOS and network drivers and Windows 7.  None of this helped.
I logged into the computer as the network Admin and the problem has disappeared!
I am looking for a rational reason for this.  Any helpful hints would be appreciated.
I'd like to be able to log back into this computer as the regular user.  Could this be the result of a bad user profile on the server?  Do I need to create a new users?

I have deployed certificate based authentication on our network for our mobile devices to be able to authenticate to the network utilizing an NDES server. We have configured the NPS policies and have pushed the Wifi configuration to our mobile's with our MDM solution. The only issue I am running into is that our exchange server is not setup for CBA. Our MDM solution required us to change the Exchange authentication from passthrough to CBA.

My question is can I setup CBA without effecting devices that do not connect to our Exchange Active Sync via our MDM. Does EAC still allow users with BYOD to connect to exchange using the credentials or do I have to somehow issue them their user certificate for them to be able to authenticate to EAC now?

I have this Asus Rog G56JK laptop.

The WLAN card has been unstable for a long period now, so i decided to change it.

Can i add this network WLAN device into this ASUS laptop.

(Or would you suggest another ?)

Today i have this WLAN card installed
Mediatek MT7630E 802.11b/g/n 150Mbps Wireless WiFi Bluetooth 4.0 WLAN Half Mini PCIe card

As i see the "old" card only supports b/g/n and the "new" card also supports AC.

But will my two "connection" cables support AC ?
Hi All.

I've an issue with iptables in redhat 6.  I've added rule which open 443 port for me. But i cant telnet that port from network. Even nmap shows me that port not opened.

What i'm doing wrong ?

I have a client who has an older Canon ir2016i Copier.

They have moved into a new office with the copier left from the previous tennants.  From all reports the copier worked fine, but I am unable to get the copier to get an IP address from the modem.
I am wondering if anyone knows a way of factory defaulting the machine or any other tips to get the copier to seek an IP address.

I have tried DHCP and Static IP functions.  I have also connected the copier direct to the modem instead of through the new network cabling installed.  Both to no avail.

The copier can photocopy fine.

I am going to try the USB connection today but would prefer a network connection.
Free Tool: ZipGrep
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Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

We just installed sonicwall unit a couple days and our hp laserjet pro 200 scanner feature stop working. Before, we have been using that feature without any issues. The printer is wired connected on the network. The printer feature is working ok, but the scanner doesn't. Do we need to create a rule into sonicwall? How should be the steps to follow up? We have a sonicwall TZ300w. Please help!
Ruckus Wireless ZoneFlex R500 Wireless Access Point  does not power up.  It does not come POE injector.  I plugged it into the Cisco POE switch but still no LED lights.   I also used the same ethernet cable to test connectivity issues with my laptop.  No problems there.   Thoughts?  Also, Amazon purchases void all warranty support...  Fun stuff!
Successfully migrated SBS2003 to Windows Standard 2012 R2.  Simple network setup - single domain, subnet, location, 35x Win7 Pro x64 PC’s and 5x Win7 Pro x64 Laptops.  The migrated AD includes the "MyBusiness" OU with "Computers", "Users" OU's below and "SBSComputers" & "SBSUsers" under those.  All users and computers reside in those folders.  All (5?) SBS-related GPO's were removed as part of the migration process and I am a complete GP Novice and so have never created anything custom or unique.  
The 2012R2 Standard Server has "Users" and "Computers" as part of the base AD structure and I'm wondering if I should move all the computers and users into those respective containers?  Or should I create OU's somewhere under those?

So my question is:  What are the best-practices for simplifying this AD structure before I start creating GPO's and performing other administrative tasks?
Successfully migrated SBS2003 to Windows Standard 2012 R2.  Simple network setup - single domain, subnet, location, 35x Win7 Pro x64 PC’s and 5x Win7 Pro x64 Laptops.  All Dell hardware and a few managed switches.  Single business cable internet connection a single Firewall/Router.  We successfully implemented the Essentials Role to use Remote Desktop Services - works great.  Almost all users have a primary desktop.

All appears well and we have successfully retired the SBS box.  One of the few remaining tasks is to re-implement Redirected Folders (which worked great in 2003).  Prior to the migration, we removed the existing SBS GPO for Redirected Folders and moved all redirected data back to the user’s local drive (and archived a copy on the server as a backup).

Enabling the Folder Redirection GPO that comes packaged with the Essentials Role seems to work as designed when I test it out however…..  our few laptop users are used to working with their offline files until they return to the office where it sync’s and all is well.  It is my experience of this new GPO that it does not cache or use offline files.  It instead removes the local folders and their contents and places them on the server.

I’ve followed a few docs online but cannot get Offline Files to work with the redirection.  That said - I am a complete rookie when it comes to Group Policy (and related OU creation).

I also note the default permissions set with the Essentials Folder Redirection GPO less than…
- (1) Cisco SG250 26P PoE switch
- (2) Ruckus WiFi ZoneFlex R610 access points (using their Unleashed setup)

I'm about to create/implement my first VLAN's, I'm pretty stoked I finally get to play with VLAN's. I've been doing IT/networking since 1991 but never did VLAN's. I've configured Sonicwall firewalls from scratch but this is my first Cisco device I get to admin; thankfully it has a GUI. I've already researched the heck out of VLAN's, trunk ports, tagging, & more, & I feel I'm ready to do it. I have the freedom to create this new network as if it were the original network built for this office. Almost all the employees are out of town for next week so it's an ideal time to build a new network. There are no Windows servers or any network services on this WiFi network; all that stuff is on the "corporate" network. This WiFi network I'm replacing/upgrading is what could be referred to as a "rogue" network that this department installed themselves just so they'd have faster Internet.

I'm creating VLAN's so our business can separate the Guest WiFi traffic to its own VLAN but also allow some inter-VLAN routing to allow our screen-sharing solution (Airtame) that guests will be using to talk to our big screens in the conf rooms, which will remain on our internal/business VLAN.

We currently have a Netgear Orbi Pro WiFi network setup but that's not quite robust/sophisticated enough for what we need to do. I'm keeping this existing Orbi WiFi network hardware …
Would it be a lot of data loss from SM to MM?
We have fiber from ISP [10Gb] is 9/125 SM going from SC to LC then into our LC 50/125 MM then into SM switch network module with SFP.

Would I have a lot of issues with that setup?

 I also read some people are using mode conditioning cables.  Will that help a lot?






Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.