The IT Stuff

Is a way of storing the same data in different places (redundantly) on multiple hard disks.

A blade server is a server chassis housing multiple thin, modular electronic circuit boards, known as server blades. Each blade is a server in its own right, often dedicated to a single application. The blades are literally servers on a card, containing processors, memory, integrated network controllers, an optional fiber channel host bus adaptor (HBA) and other input/output (IO) ports.

HP,IBM,DELL

• Enough space for cabling and access to the side and back of server racks and other equipment, and you must have enough height to accommodate a raised floor as well as the extra air-conditioning and ventilation ducts requirements based on your existing needs and well as three to five years into the future..
• Should try to stay away from basement and ground floor levels, where you run the risk of flooding in the basement and roof leaks on the top floors & border outside Server room  walls can make temperature and humidity control difficult, especially if they have windows.Avoid areas of the building with high traffic, for physical security reasons.
• Determine the maximum load ratings for every piece of hardware that will be in your data center.
• Estimate the number of outlets required and their approximate placement.
• Data centers with domain controllers, DNS servers, web servers and other mission critical systems will require backup generators as well as UPS units
• Data centers with domain controllers, DNS servers, web servers and other mission critical systems will require backup generators as well as UPS units

• Power over Ethernet: 24 full PoE port and 24-port (PoE supported on 8 ports) configurations
• Connectivity: Fast Ethernet and Gigabit Ethernet connectivity in 8-port, 24-port, and 48-port configurations
• Integrated security, including network admission control (NAC)
• Advanced quality of service (QoS) and resiliency
• Single IP address, syslog, and Simple Network Management Protocol (SNMP) management for a stack of up to 16 switches
• Intelligent services for the network edge
• Limited Lifetime Hardware Warranty
• Software updates at no additional charge
• Simplified network management with Cisco Network Assistant

The Internet Protocol Suite (commonly known as TCP/IP) is the set of communications protocols used for the Internet and other similar networks. It is named from two of the most important protocols in it: the Transmission Control Protocol (TCP) and the Internet Protocol (IP), which were the first two networking protocols defined in this standard.

The TCP/IP model consists of four layers  From lowest to highest, these are the

Link Layer, the Internet Layer, the Transport Layer, and the Application Layer.