Cisco recently launched the Workforce Retraining Initiative to help retrain workers and support the country’s efforts to strengthen the economy. President Barack Obama recently spoke about the program. Watch Now
To learn more about the Workforce Retraining pilot in Michigan visit www.WorkforceRetrainingUS.com or read the press release.
local area network is a computer network covering a small geographic area, like a home, office, or group of buildings e.g. a school. The defining characteristics of LANs, in contrast to Wide Area Networks (WANs), include their much higher data transfer rates, smaller geographic range, and lack of a need for leased telecommunication lines.
Ethernet over unshielded twisted pair cabling, and Wi-Fi are the two most common technologies currently, but ARCNET, Token Ring and many others have been used in the past.
The first LAN put into service occurred in 1964 at the Livermore Laboratory to support atomic weapons research. LANs spread to the public sector in the late 1970s and were used to create high-speed links between several large central computers at one site. Of many competing systems created at this time, Ethernet and ARCNET were the most popular.
The development and proliferation of CP/M and then DOS-based personal computers meant that a single site began to have dozens or even hundreds of computers. The initial attraction of networking these was generally to share disk space and laser printers, which were both very expensive at the time. There was much enthusiasm for the concept and for several years, from about 1983 onward, computer industry pundits would regularly declare the coming year to be “the year of the LAN”.
In reality, the concept was marred by proliferation of incompatible physical layer and network protocol implementations, and confusion over how best to share resources. Typically, each vendor would have its own type of network card, cabling, protocol, and network operating system. A solution appeared with the advent of Novell NetWare which provided even-handed support for the 40 or so competing card/cable types, and a much more sophisticated operating system than most of its competitors. Netware dominated[1] the personal computer LAN business from early after its introduction in 1983 until the mid 1990s when Microsoft introduced Windows NT Advanced Server and Windows for Workgroups.
Of the competitors to NetWare, only Banyan Vines had comparable technical strengths, but Banyan never gained a secure base. Microsoft and 3Com worked together to create a simple network operating system which formed the base of 3Com's 3+Share, Microsoft's LAN Manager and IBM's LAN Server. None of these were particularly successful.
In this same timeframe, Unix computer workstations from vendors such as Sun Microsystems, Hewlett-Packard, Silicon Graphics, Intergraph, NeXT and Apollo were using TCP/IP based networking. Although this market segment is now much reduced, the technologies developed in this area continue to be influential on the Internet and in both Linux and Apple Mac OS X networking—and the TCP/IP protocol has now almost completely replaced IPX, AppleTalk, NBF and other protocols used by the early PC LANs.
Initially, LANs were limited to a range of 185 meters or 600 feet and could not include more than 30 computers. Today, a LAN could connect a max of 1024 computers at a max distance of 900 meters or 2700 feet.
Networking in buisness for Entrepreneurs
Networking is an essential skill for most business people, but especially for entrepreneurs. The strong association between the entrepreneur as a person and his or her business demands that entrepreneurs get out into the world and create and maintain business relationships. Here are some tips and resources to help you improve your networking skills and extend your reach.
Business Network International
BNI is one of the oldest and certainly the world's largest business networking and referral organization. Over 2,700 chapters around the world offer their members an environment in which to develop personal relationships with other, non-competing businesspeople.
Why Business Plans Don't Get Funded
There are plenty of business plan resources available on the Web. Most of them focus on what to do, but many times the best lessons are learned from mistakes and seeing how to avoid them. Guest author Akira Hirai takes a look at the most common, easily avoidable mistakes that will keep investors from funding your project.
CORE OF NETWORKING
Some Important Network Components
What Is a Router?
A router is a small hardware device that joins multiple networks together. These networks can include wired or wireless home networks, and the Internet.
Top 802.11g Wireless Routers for Home
The 802.11g standard supports much faster peer networking than the older 802.11b standard. These routers are designed to share a broadband Internet connection and usually contain a built-in firewall, DHCP server, and network switch.
Introduction to Hubs
A hub is a very simple hardware device that supports basic file sharing between computers connected with network cables.
What Is a Network Switch?
A network switches is a small hardware device that join multiple computers together at a low-level network protocol layer. Switches differ in capability from both hubs and routers.
What is the Difference Between a Hub and a Switch?
Switches are "smarter" than hubs, but what does that really mean? This article explains the difference between using hubs and switches in home computer networks.
FireWire - IEEE 1394
FireWire is a high performance networking standard based on a serial bus architecture similar to USB. You can use FireWire cables and connections for fast local file transfer.
What Is a Layer 3 Switch?
Traditional network switches operate at Layer 2 of the OSI model while network routers operate at Layer 3. This often leads to confusion over the definition of Layer 3 switch. Layer 3 switches actually differ very little from routers.
PCMCIA
PCMCIA is an industry organization best known for developing a standard network adapter called the PC Card. Many notebook computers contain two PCMCIA slots that hold one or two of these cards.
Bridge
In computer networking, a bridge divides a LAN into two segments, selectively forwarding traffic across the network boundary it defines. A bridge is not quite the same as a switch.
Repeater
Repeaters extend the distance a network can span by ensuring good signal quality.
RS-232
RS-232 is a telecommunications standard for connecting certain types of electronic equipment. RS-232 interfaces called ports are used on many older PC computers and modems.
Information On IP Addresses
How to find, change, hide and otherwise work with IP addresses
IP addresses are the fundamental method for computers to identify themselves on most computer networks. Every computer (or other network device) connected to the Internet has an IP address. This tutorial explains the basics of finding, changing, and hiding (your) my IP addresses.
Inside IP Addresses
IP addresses are written in a notation using numbers separated by dots. This is called "dotted-decimal" notation. Examples of IP addresses in dotted-decimal notation are 10.0.0.1 and 192.168.0.1 although many millions of different IP addresses exist.
Why Choose EDraw to Draw Network Diagrams
Network Diagrams such as home network diagram, wireless network diagram, network cable diagrams, logical network diagrams, network wiring diagrams, LAN network diagrams, activity network diagrams, network topology diagrams, local network area diagrams, network physical diagrams, network security diagrams, network wan diagrams, network wiring cable diagrams, network cabling diagrams, and network voip diagrams are very complicated to hand-draw. EDraw provides all-inclusive collection of templates, symbols and computer clip-art images to rapidly create diagrams such as Motherboards, Network Topologies, Peer-to-Peer (P2P), LAN/WAN Design and Network Cabling. It will helps creating computer network diagrams within minutes, comprises 2D and 3D networking symbols, block diagramming symbols and Cisco network symbols. It can create customized libraries of network components, and can draw detailed network diagram showing placements of network equipment and their logical and physical connection and arrangement. EDraw enable sharing network diagrams on the web or in a business presentation enhancing business communication.
Why Choose EDraw to Draw Network Diagrams
Network Protocols
In networking, the communication language used by computer devices is called the protocol. Yet another way to classify computer networks is by the set of protocols they support. Networks often implement multiple protocols to support specific applications. Popular protocols include TCP/IP, the most common protocol found on the Internet and in home networks.
Network Protocols
Two Types Of Network Design
The two types of high-level network design are called client-server and peer-to-peer. Client-server networks feature centralized server computers that store email, Web pages, files and or applications. On a peer-to-peer network, conversely, all computers tend to support the same functions. Client-server networks are much more common in business and peer-to-peer networks much more common in homes.
Two Types Of Network Design
Wired vs Wireless Networking
Many of the same network protocols, like TCP/IP, work in both wired and wireless networks. Networks with Ethernet cables predominated in businesses, schools, and homes for several decades. Recently, however, wireless networking alternatives have emerged as the premier technology for building new
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