CAT 6 Cables

CAT6 cable contains four pairs of copper wire and unlike CAT5, utilizes all four pairs. CAT6 supports Gigabit (1000 Mbps) Ethernet and supports communications at more than twice the speed of CAT5e, the other popular standard for Gigabit Ethernet cabling.

CAT6 comes at a significantly higher price tag than CAT5 or CAT5e, and today's applications simply can't take advantage of CAT6's better performance. However, if wiring a home or building for the long term, one may still consider using CAT6.

Virtual Support Networks (VSNs)

Virtual Support Networks (VSNs) are a second-generation of internet-based remote access technology. Like those solutions, VSNs are:

• Web-based. This means they communicate over standard secure web ports that are already open in the firewall.

• High-performance. They are not only faster over any kind of network but also more resilient to packet loss, temporary loss of connections, and the other realities of today’s Internet.

• Secure. Using the same secure web protocols that drive billions of dollars of financial transactions VSNs are secure, permissions-based, and give granular control over the level of access the supported system provides.

SAN - Storage Area Network

Normally in Microsoft servers distribution computing and load sharing is possible but its only within their platform. We can share database within different platforms like windows, Linux and Solaris but we should use some third party software's to implement it. Here is a Network Topology to reduce this disadvantage SAN (Storage Area Network). Benefits of this Network is you can share your data as well as server information's. When a server is in fault we have switch to backup servers but in this we can switch over any server which is in SAN so that it reduces the failure of real time servers. To know more about SAN browse this wiki.

OSI Layer

The LayersThink of the seven layers as the assembly line in the computer. At each layer, certain things happen to the data that prepare it for the next layer. The seven layers are:






Layer 7: Application - This is the layer that actually interacts with the operating system or application whenever the user chooses to transfer files, read messages or perform other network-related activities.



Layer 6: Presentation - Layer 6 takes the data provided by the Application layer and converts it into a standard format that the other layers can understand.



Layer 5: Session - Layer 5 establishes, maintains and ends communication with the receiving device.

Layer 4: Transport - This layer maintains flow control of data and provides for error checking and recovery of data between the devices. Flow control means that the Transport layer looks to see if data is coming from more than one application and integrates each application's data into a single stream for the physical network.



Layer 3: Network - The way that the data will be sent to the recipient device is determined in this layer. Logical protocols, routing and addressing are handled here.



Layer 2: Data Link - In this layer, the appropriate physical protocol is assigned to the data. Also, the type of network and the packet sequencing is defined.



Layer 1: Physical - This is the level of the actual hardware. It defines the physical characteristics of the network such as connections, voltage levels and timing.



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