Network Drives – An Essential Tool For the Modern Home

Computer networks are really nothing new. They have been used by businesses for a number of years. LANs (local area networks) and even WANs (wide area networks) have been a reality for a considerable amount of time. However, during that time, they have evolved considerably. In addition to changes in the way that businesses and organizations use and interact with networks, there have also been developments on the consumer end of things.

In the world of consumers, it was once normal to have only one computer per household. However, as desktops and laptops became more affordable, more and more homes found the need for multiple computers. Today, it is quite normal to see a home with two, three or even four computers. In addition, the home network has continued to evolve as new technology has come about.

One of the driving factors behind the evolution of the home network has been the continued development of home entertainment solutions that rely on the Internet, or offer other technological capabilities. For example, it is now possible to find Blu-ray players and TVs that can connect to the Internet over both wired and wireless connections. In addition, streaming media within a home can also be a reality here.

However, there has always been one hurdle that needs to be overcome in both consumer-end networks and within business networks – data storage. Traditionally, storage has been accomplished via internal hard drives in computers and in servers. However, this is no longer the best option on the market.

Enter the NAS external Network drive. NAS stands for network-attached storage, and external hard drives are able to accomplish a number of goals for both consumers and home users here. What might you find with these types of setups?

What Is a NAS Network Drive Unit?

In its simplest form, a NAS unit can be any unit attached to a network for storage purposes. Once upon a time, this was a server – a computer specifically setup to serve data. However, servers were very expensive. Most homeowners could not justify the costs of these devices, limiting their effectiveness to business applications in most instances.

There is a difference between a NAS unit and a SAN unit. SAN units are “storage area networks,” and do not have a file system of their own, offering only block-based storage. NAS units, on the other hand, have a file system of their own, as well as storage. The file system (operating system) within a NAS unit might be Windows or UNIX, or even another operating system. However, it will interface with the operating system of client machines regardless, in most instances.

Uses of External Network Drives

Numerous uses for these types of external hard drives can be found. They play a significant role in smaller business networks where a full server system is not necessary. They also play a role in home networking. It is this latter area where the most growth potential has been seen.

Once upon a time, a home network was really nothing more than a means by which several computers within a home shared an incoming Internet connection. This was typical with DSL and cable connections. However, times are changing and the needs of the modern consumer are a bit different from those of consumers in the past.

Types of Network Attached NAS Drives

Consumers and businesses will find several types of external hard drives for use with NAS systems. USB connectible drives are probably the most common. USB 2.0 technology currently makes up the bulk of these devices. However, USB 3.0 has come online, and newer hard drives offer this technology.

Of course, there are also eSATA and FireWire connectible hard drives available for use. Both of these technologies offer different benefits and work with different computer/router configurations.

Understanding the Modern Home Network

As mentioned, it was once considered normal for a home network to do nothing more than allow several computers to share a single Internet connection. This is still the case with many home networks. However, more and more home users are finding the need to share data between those computers, as well as with connected devices in their homes.

This has been most noticeable since the rise of multimedia data. Movies, music and even applications can be shared across a home network with an external hard drive connected to the home network, today. As more and more consumers make use of digital media, this need grows, as well.

In a typical home network that utilizes such an external hard drive, the storage device is actually connected to the router. This allows any device that can connect to the router (whether through an Ethernet cable or wirelessly) to access the files stored on the hard drive. Now, the typical picture here is one in which individual computers access the storage device, opening files and storing new ones as needed.

However, this is far from the only setup in home networks. As more and more peripheral devices are manufactured to make use of wired and wireless home connections, more and more consumers are able to benefit from streaming media. For instance, a new HDTV might connect to the hard drive and allow home users to watch videos or look at family pictures. Others might choose to use these systems to stream games, to facilitate online chat or email through their TV or to download new entertainment through a Blu-Ray player or other connected device.

Many other devices can use this type of setup, as well. For instance, whole-home music systems are becoming more common. These might stream online music from a service like Pandora or Last.fm, but they can also play files that users have stored on their external hard drive connected to the network. This allows consumers to listen to the same songs throughout their entire home. More advanced systems actually allow different music to be played in each room, while using the same control unit.

A Bright Future for Network Drives

Network-attached NAS drives will become more and more common as home networks continue to evolve. In fact, the ultimate evolution might just be the whole-home computer system touted in science fiction books. The external hard drive will continue to play an integral role in decentralizing data storage away from individual computers and making data more accessible throughout the entire home. What we have seen thus far is only the tip of the iceberg in terms of potential, but there is no doubt that these solutions offer some innovative benefits for consumers.

Networking Basics

A network is a group of computers, printers, and other devices that are connected together with cables. The sharing of data and resources. Information travels over the cables, allowing network users to exchange documents & data with each other, print to the same printers, and generally share any hardware or software that is connected to the network. Each computer, printer, or other peripheral device that is connected to the network is called a node. Networks can have tens, thousands, or even millions of nodes.

Cabling:

The two most popular types of network cabling are twisted-pair (also known as 10BaseT) and thin coax (also known as 10Base2). 10BaseT cabling looks like ordinary telephone wire, except that it has 8 wires inside instead of 4. Thin coax looks like the copper coaxial cabling that’s often used to connect a VCR to a TV set.

Network Adapter:

A network computer is connected to the network cabling with a network interface card, (also called a “NIC”, “nick”, or network adapter). Some NICs are installed inside of a computer: the PC is opened up and a network card is plugged directly into one of the computer’s internal expansion slots. 286, 386, and many 486 computers have 16-bit slots, so a 16-bit NIC is needed. Faster computers, like high-speed 486s and Pentiums, , often have 32-bit, or PCI slots. These PCs require 32-bit NICs to achieve the fastest networking speeds possible for speed-critical applications like desktop video, multimedia, publishing, and databases. And if a computer is going to be used with a Fast Ethernet network, it will need a network adapter that supports 100Mbps data speeds as well.

Hubs

The last piece of the networking puzzle is called a hub. A hub is a box that is used to gather groups of PCs together at a central location with 10BaseT cabling. If you’re networking a small group of computers together, you may be able to get by with a hub, some 10BaseT cables, and a handful of network adapters. Larger networks often use a thin coax “backbone” that connects a row of 10BaseT hubs together. Each hub, in turn, may connect a handful of computer together using 10BaseT cabling, which allows you to build networks of tens, hundreds, or thousands of nodes.
Like network cards, hubs are available in both standard (10Mbps) and Fast Ethernet (100Mbps) versions.

LANs (Local Area Networks)

A network is any collection of independent computers that communicate with one another over a shared network medium. LANs are networks usually confined to a geographic area, such as a single building or a college campus. LANs can be small, linking as few as three computers, but often link hundreds of computers used by thousands of people. The development of standard networking protocols and media has resulted in worldwide proliferation of LANs throughout business and educational organizations.

WANs (Wide Area Networks)

Often a network is located in multiple physical places. Wide area networking combines multiple LANs that are geographically separate. This is accomplished by connecting the different LANs using services such as dedicated leased phone lines, dial-up phone lines (both synchronous and asynchronous), satellite links, and data packet carrier services. Wide area networking can be as simple as a modem and remote access server for employees to dial into, or it can be as complex as hundreds of branch offices globally linked using special routing protocols and filters to minimize the expense of sending data sent over vast distances.

Internet

The Internet is a system of linked networks that are worldwide in scope and facilitate data communication services such as remote login, file transfer, electronic mail, the World Wide Web and newsgroups.
With the meteoric rise in demand for connectivity, the Internet has become a communications highway for millions of users. The Internet was initially restricted to military and academic institutions, but now it is a full-fledged conduit for any and all forms of information and commerce. Internet websites now provide personal, educational, political and economic resources to every corner of the planet.

Intranet

With the advancements made in browser-based software for the Internet, many private organizations are implementing intranets. An intranet is a private network utilizing Internet-type tools, but available only within that organization. For large organizations, an intranet provides an easy access mode to corporate information for employees.

Ethernet

Ethernet is the most popular physical layer LAN technology in use today. Other LAN types include Token Ring, Fast Ethernet, Fiber Distributed Data Interface (FDDI), Asynchronous Transfer Mode (ATM) and LocalTalk. Ethernet is popular because it strikes a good balance between speed, cost and ease of installation. These benefits, combined with wide acceptance in the computer marketplace and the ability to support virtually all popular network protocols, make Ethernet an ideal networking technology for most computer users today. The Institute for Electrical and Electronic Engineers (IEEE) defines the Ethernet standard as IEEE Standard 802.3. This standard defines rules for configuring an Ethernet network as well as specifying how elements in an Ethernet network interact with one another. By adhering to the IEEE standard, network equipment and network protocols can communicate efficiently.

Protocols

Network protocols are standards that allow computers to communicate. A protocol defines how computers identify one another on a network, the form that the data should take in transit, and how this information is processed once it reaches its final destination. Protocols also define procedures for handling lost or damaged transmissions or “packets.” TCP/IP (for UNIX, Windows NT, Windows 95 and other platforms), IPX (for Novell NetWare), DECnet (for networking Digital Equipment Corp. computers), AppleTalk (for Macintosh computers), and NetBIOS/NetBEUI (for LAN Manager and Windows NT networks) are the main types of network protocols in use today.
Although each network protocol is different, they all share the same physical cabling. This common method of accessing the physical network allows multiple protocols to peacefully coexist over the network media, and allows the builder of a network to use common hardware for a variety of protocols. This concept is known as “protocol independence,” which means that devices that are compatible at the physical and data link layers allow the user to run many different protocols over the same medium.

Topologies

A network topology is the geometric arrangement of nodes and cable links in a LAN, and is used in two general configurations: bus and star. These two topologies define how nodes are connected to one another. A node is an active device connected to the network, such as a computer or a printer. A node can also be a piece of networking equipment such as a hub, switch or a router. A bus topology consists of nodes linked together in a series with each node connected to a long cable or bus. Many nodes can tap into the bus and begin communication with all other nodes on that cable segment. A break anywhere in the cable will usually cause the entire segment to be inoperable until the break is repaired. Examples of bus topology include 10BASE2 and 10BASE5.
10BASE-T Ethernet and Fast Ethernet use a star topology, in which access is controlled by a central computer. Generally a computer is located at one end of the segment, and the other end is terminated in central location with a hub. Because UTP is often run in conjunction with telephone cabling, this central location can be a telephone closet or other area where it is convenient to connect the UTP segment to a backbone. The primary advantage of this type of network is reliability, for if one of these ‘point-to-point’ segments has a break, it will only affect the two nodes on that link. Other computer users on the network continue to operate as if that segment were nonexistent.

Peer-to-Peer Networks

A peer-to-peer network allows two or more PCs to pool their resources together. Individual resources like disk drives, CD-ROM drives, and even printers are transformed into shared, collective resources that are accessible from every PC.

Unlike client-server networks, where network information is stored on a centralized file server PC and made available to tens, hundreds, or thousands client PCs, the information stored across peer-to-peer networks is uniquely decentralized. Because peer-to-peer PCs have their own hard disk drives that are accessible by all computers, each PC acts as both a client (information requestor) and a server (information provider). A peer-to-peer network can be built with either 10BaseT cabling and a hub or with a thin coax backbone. 10BaseT is best for small workgroups of 16 or fewer users that don’t span long distances, or for workgroups that have one or more portable computers that may be disconnected from the network from time to time.

After the networking hardware has been installed, a peer-to-peer network software package must be installed onto all of the PCs. Such a package allows information to be transferred back and forth between the PCs, hard disks, and other devices when users request it. Popular peer-to-peer NOS software includes
Most NOSs allow each peer-to-peer user to determine which resources will be available for use by other users. Specific hard & floppy disk drives, directories or files, printers, and other resources can be attached or detached from the network via software. When one user’s disk has been configured so that it is “sharable”, it will usually appear as a new drive to the other users. In other words, if user A has an A and C drive on his computer, and user B configures his entire C drive as sharable, user A will suddenly have an A, C, and D drive (user A’s D drive is actually user B’s C drive). Directories work in a similar fashion. If user A has an A & C drive, and user B configures his “C:WINDOWS” and “C:DOS” directories as sharable, user A may suddenly have an A, C, D, and E
drive (user A’s D is user B’s C:WINDOWS, and E is user B’s C:DOS). Did you get all of that?

Because drives can be easily shared between peer-to-peer PCs, applications only need to be installed on one computer–not two or three. If users have one copy of Microsoft Word, for example, it can be installed on user A’s computer–and still used by user B.

The advantages of peer-to-peer over client-server NOSs include:
· No need for a network administrator
· Network is fast/inexpensive to setup & maintain
· Each PC can make backup copies of its data to other PCs for security. By far the easiest type of network to build, peer-to-peer is perfect for both home and office use.

Client-Server Networks

In a client-server environment like Windows NT or Novell NetWare, files are stored on a centralized, high speed file server PC that is made available to client PCs. Network access speeds are usually faster than those found on peer-to-peer networks, which is reasonable given the vast numbers of clients that this architecture can support. Nearly all network services like printing and electronic mail are routed through the file server, which allows networking tasks to be tracked. Inefficient network segments can be reworked to make them faster, and users’ activities can be closely monitored. Public data and applications are stored on the file server, where they are run from client PCs’ locations, which makes upgrading software a simple task–network administrators can simply upgrade the applications stored on the file server, rather than having to physically upgrade each client PC.

In the client-server diagram below, the client PCs are shown to be separate and subordinate to the file server. The clients’ primary applications and files are stored in a common location. File servers are often set up so that each user on the network has access to his or her “own” directory, along with a range of “public” directories where applications are stored. If the two clients below want to communicate with each other, they must go through the file server to do it. A message from one client to another is first sent to the file server, where it is then routed to its destination. With tens or hundreds of client PCs, a file server is the only way to manage the often complex and simultaneous operations that large networks require.

Computer Networking is the very important and the crucial part of the Information Technology. Millions of the computers are networked together to form the Internet. Networking plays a important role in every kind of organization from small to medium sized, in Banks, Multinataional Companies, Stock Exchanges, Air Ports, Hospitals, Police Stations, Post Offices, Colleges, Universities, and even in home, in short networking plays an important role everywhere where computers are used. This article will be interesting for the students, network professionals and for the people who are interested in the computer networking

Your Entry Into the IT World With Hardware and Networking Courses

There are endless job opportunities in computer field; it has enormous scope for every I.T. professional and technicians. It is needless to say that computer is being used in everywhere now, from corporate offices, to small business houses, to colleges and to every household. Computer and internet have brought a revolution and globalized the world. Life has become easy and comfortable with computer technology. There are chunks of computer training institutes in Delhi which also offer hardware networking course.

There is a huge demand of hardware and networking engineers in I.T, sector. These networking engineers connect computers, printers, wireless communication devices and many other electronic instruments in order to share data and information with in a specific network. These networking engineers are the backbone of any I.T. company. All the big I.T. giants have a team of professional hardware and networking engineers who look after the entire computer infrastructure of the company. On the other hand the smaller companies cannot afford the expense of employing the team of these engineers so they summon the networking engineer at their work place, in case of any technical error. These engineers also design the manufacturing and installation of hardware. To succeed in I.T. sector you need to have proper implementation of your knowledge in hardware and networking course.

To become hardware and networking engineer the basic qualification required is science background (preferably) in plus 2. In addition with this, a sound knowledge of basic computers skills is an advantage to you. You could opt for degree or diploma in hardware networking. There are innumerable institutes and colleges in Delhi and India that offer you degree or diploma both in hardware and networking. However, one should only prefer well known colleges or institutes for the course because they provide job assistance along with quality education.

There are ample job opportunities for a networking engineer. These jobs are offered by hardware manufacturing companies, software companies, B.P.O.s, telecom companies and hardware repair stores.

Students with hardware and networking degree are in huge demand in various I.T. companies on the other hand candidates with diploma in networking and hardware often find job in hardware repair stores. Their skills and qualifications play a chief role to get them placed.

According to the recent survey it has been discovered that the hardware market in India is expected to grow above $60 billion landmark. Hardware and networking courses are huge popular among youngsters and professionals. As a working professional you can enhance your I.T. skills by joining evening classes of hardware and networking. There are institutes that offer you flexibility to do your course either in evening or during weekends.

Frequent developments and achievements in computer field have also attracted lot of computer savvies towards networking. You need to keep yourself updated with constant changes taking place in the networking area. As a networking engineer you can work as –

– Network System Administrator
– Network Programmer or analyst
– Network Managers
– Computer support Specialist
– Network Service Technician

Besides a sharp mind and good analytical skills in hardware and networking, the other thing you require is impressive communication skills. You have to work with many people who are not technically sound and to make them understand regarding any technical error, a communication and convincing skills are necessary.

Some of hardware and networking institutes in Delhi are-

– Jetking
– Institute of Network Technology pvt.. Limited
– CMS Computer Institute
– Networking Nuts
– Atlantus
– CMC Limited