June 24, 2009
The TCP/IP protocol is widely used throughout the world to provide network communications. The TCP/IP model is composed of the following four layers, each having its own security controls that provide different types of protection: Application, Transport, Network, and Data Link. Application layer, which sends and receives data for particular applications. Separate controls must be [...]
It is important to understand that VPNs do not remove all risk from networking. While VPNs can greatly reduce risk, particularly for communications that occur over public networks, they cannot eliminate all risk for such communications. One potential problem is the strength of the implementation. For example, flaws in an encryption algorithm or the software [...]
A VPN is a virtual network, built on top of existing physical networks, that can provide a secure communications mechanism for data and other information transmitted between networks. Because a VPN can be used over existing networks, such as the Internet, it can facilitate the secure transfer of sensitive data across public networks. This is [...]
This type of SSL VPN allows a user to use a typical Web browser to securely access multiple network services, including applications and protocols that are not web-based, through a tunnel that is running under SSL. SSL tunnel VPNs require that the Web browser be able to handle active content, which allows them to provide [...]
May 4, 2009
Network bandwidth is one of the most important areas of consideration with VDI. Network bandwidth requirements are typically limited to carrying keystrokes and mouse movements to the server and returning screen refreshes to the endpoint. Multiply this keystroke/mouse bandwidth times hundreds or thousands of virtual desktops; the network bandwidth is heavily utilized, even when no application [...]
April 20, 2009
As businesses tighten their belts in response to the recession, organizations are identifying what network platforms need additional functionality as cheaply as possible. Increasingly, they’re opting for risk-free used networking equipment as part of extending the life span of their network. Used solutions are a viable financial solution because used equipment is cheaper and easier to deploy than going through a lengthy [...]
April 17, 2009
Here are some of the pros of deploying desktop virtualization: Desktop virtualization, a.k.a. virtual desktop infrastructure (VDI), is based on thin-client computing. The virtual desktop machine on the server side handles all tasks related to the OS, application processing and storage. Thin-client endpoints typically use some local software (basic OS to boot the endpoint and [...]
February 9, 2009
Many organizations have launched virtualization strategies to consolidate servers, reduce energy consumption in the data center, increase business agility and reduce costs. But there is life for virtualization beyond the server. Now virtualization is moving into the realm of desktop and mobile computing. As businesses look to make further cuts in IT Infrastructure expenses, many [...]
January 23, 2009
Up to 37% of a data center’s energy costs can be attributed to cooling infrastructure. A central part of cooling data centers is moving the air, and a big part of air movement is the cooling unit’s fans. Incremental changes in the type of fan, airflow direction and fan speed offer opportunities for energy efficiency [...]
January 22, 2009
IPv6 is the next generation of the internet Protocol, and will dramatically expand the number of addresses available for web sites, as well as millions of mobile devices with Internet access. Only 4 percent of the Internet’s networks support IPv6, although the availability of IPv4 addresses is limited. About 150 million IPv4 addresses were assigned in [...]
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