Troubleshooting Network Information Cards (NIC)

Be sure that you have eliminated possible faulty wiring before you determine the problem as being the network card. Be sure all wiring is connect and tight.

The network cards of the past were much harder to troubleshoot. For one thing they had jumpers that needed to be set according to the type of configuration you needed for a particular computer. You also needed to know the IRQ number so that it would not interfere with any other hardware. The older cards also didn’t have much speed and they were 8-bit. Now they are 16 and 32 bit mostly with new technology on the way. Now you configure them with software and you don’t have to know the IRQ.

What you need to know today

You will need a plug and play network card. You will also need a PCI slot on the mother board on the average. They also make network cards for PCI express. You need to know what driver you need. A driver is a small program that is needed to communicate between the Network card and the Motherboard and processor. The card will not work without it. The operating system picks the best setting for the card.

Do I still have to configure the card manually?

Maybe! If your network requires a specific network address or setting you may need to manually configure it. You normally will not need to worry about IRQ setting on modern computers.

Are there more than one type of network card?

Although there are more types, the main one used on most networks today is the 10baseT using port RJ-45. The other cards are Thinnet with port BNC and Thicknet with port AUI.

Proper installation

When installing a network card or any other hardware be sure you are grounded. Preferably ware a ground strap. Carefully put the card into the slot by rocking it if necessary. Do not force it. Be sure to secure it with a screw. If it is doesn’t require tools, just fasten it as required.

Exceptions

laptops are the biggest exception to many of the above rules. The network card, sound card and video are on an integrated motherboard. This means you must have the drivers for the motherboard if you want them to work. The drivers are normally on the company web site that made the computer. Since Windows XP most drivers will install automatically and are a part of the operating system. However, don’t bet on it. It is also possible an installation disk came with the computer or that it has a restore sector.

How do I know if I need to replace the network card?

You will know when it keeps cutting out or will not connect at all. If you have the proper driver and it does not work it is probably bad. Be sure you have the right driver for the right operating system. If you have Vista and you drive is for XP it will not work. Some exceptions do exist. You will also know if you are having trouble getting the network to work. maybe a networked programs keeps getting errors or you can not stay connected to the Internet. When in doubt replace the card. If you still are having trouble it could be the cable or a problem with the operating system. Viruses or spyware could exist also.

Value of Networking + Informational Interviewing Tips

I recently facilitated the ASTD Training Certificate Program sponsored by the ASTD Ft. Worth, TX chapter. One of my participants was a gal named Eileen from California. Eileen is transitioning from Sales Management in the Pharmaceutical industry in to training and development. Eileen will be fabulous – she has excellent business acumen, in-depth industry experience, a natural energy and zest for learning, and great facilitation skills. She was a joy to have in our session!

As I mentioned, Eileen is transitioning into the workplace learning and performance/training and development profession. She’s asking the right questions to gather the information and perspective she needs to be successful. Eileen just wrote me today with a networking update:

“… speaking of networking, I have just learned the valuable lesson of always getting your job search message out complete with your professional objective.

Monday night while sitting around after playing a tennis match, the other members of the team asked about my class that I had taken through ASTD. I raved on about the class and about you. One of the players whom I don’t know very well sat listening intently and then asked a few more questions about what type of job I was looking to transition into. I provided a recap of my past employment, my skills and my goals about breaking into the training and development industry.

She then says to me, “You know, you should speak with my mother-in-law, she OWNS a training and development company”!!! Amazing, huh?”

So Eileen is on the right track to make her transition successful! She now has an informational interview set up with the owner of the training company. Eileen asked me for suggestions on questions that she should not miss asking. Below are some thoughts I shared. Read on, and then let me know what powerful questions you recommend for information interviews?

  • What do you recommend I do to prepare for a position In your company/department should one become available?” Take good notes, then if you are really interested in that company/department, start doing what they suggest!
  • What concerns would you have about hiring me?” or some variation… the goal is to ferret out information that may be holding you back without you being aware of it.
  • Similarly, ask “if you had a position available, why would you hire me?” or some variation – try to discover what the person you are talking with sees as your strengths that you may not recognize (or to reinforce what you know to be true about yourself and to help them see it as well).
  • Be sure to find out about the types of clients they work with, the type of work they do… “Describe a typical day in your job for me.” They likely won’t have a “typical” day, but you want to get a feel for the variety of activities and responsibilities in their work. Of course, if you are talking to the owner of a company that has people/trainers working for them, you may want to modify to “a typical day for your trainers” or whichever position you are interested in.
  • It is always good to ask about the pleasures and frustrations they experience in their role/company. This will help you be realistic about future positions you may land in.
  • I’d also recommend asking the person you are talking with to describe her perfect client, her company culture… all things to help you get a feel for if you’d want to work there or to help you narrow down the type of work you want to do and the type of environment in which to do it.

I hope these questions help Eileen. As I said, she is well on her way to a successful transition into my beloved profession.

We all need a little help from our friends via networking, informational interviews, and thoughts on how to prepare. What tips do you have for informational interviews?

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