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Windows Vista introduced AERO, a desktop experience that had four major elements; Windows Flip, Windows Filmstrip, AERO Glass transparency and fully realized thumbnail views on the Taskbar. Windows 7 added several new features to AERO, including AERO Snap, AERO Shake...
Welcome back! Previously, we decided that in order for a Layer-3 MPLS VPN to function correctly, the ingress PE is going to need to push two labels onto each data packet. Let’s say that we have a data packet going from site A2 to site A3, using the topology shown in...
The subject of this week’s post was actually prompted by a question from a former colleague. Soon after the PIX Firewall added support for IPSec Virtual Private Networks, a command was added to the command-line, sysopt connection permit-ipsec. This command was subse...
Even in professionally managed network environments it is still possible for mistakes to happen. If an Active Directory object such as a user or computer account is accidentally deleted network access will be lost. Worker productivity will decline until the account...
We have three major issues that we need to deal with in order to successfully use routers within a WAN provider’s cloud: Multiple routing tables in RAM Excessive latency Address-space collisions Let’s assume that we have a WAN provider with two customers, “A” an...
Windows 7 can be a good file server on very small workgroup networks. Although Windows 7 is limited to only 10 concurrent client connections as a file server it can do a good job making files accessible over a network. Windows 7 shares a great deal of code with Windo...
Learn how to calculate QOS Bandwidth Percent vs Bandwidth Remaining Percent using a Cisco-defined formula. Read on for answers and examples from the experts at Global Knowledge!
There are many interesting new issues that seem to have come with the addition of voice and video to the data network. Most of the engineers that are now working on VoIP networks come from either a pure data network background or a traditional phone system background...
In my last post, we learned that the Dynamic Host Configuration Protocol (DHCP) is a computer networking protocol used by hosts, identified as DHCP clients, to retrieve IP address assignments and other configuration information. DHCP uses a client-server architectur...
Recently, I was asked the following question: “We plan to implement Windows 7 in our network very soon. We want to use Windows 2003 Domain Controllers for the next couple of years. Can we make the hundreds of new Group Policy setting available to Windows 7 Windows Server 2003 DCs?” This is not an unusual situation. Some organizations find they need to replace their desktop computers immediately because of age or obsolescence and others wish to upgrade to Windows 7 because of its superior security and performance. But there may be no budget or desire to upgrade to Windows 2008 or 2008 R2. Luckily, it is not difficult to adapt Server 2003 to work with Windows 7.