Computer Hardware Engineering. Lecture 9: Parallelism, Concurrency, Speedup, and ILP. David Broman. Associate Professor, KTH Royal Institute of. Tools for teaching computer networking and hardware concepts / Nurul Sarkar, editor. p. cm. . Section IV: Teaching and Learning Computer Hardware. Chapter XI. Chapter IX provides a tutorial on Wi-Fi networking and radio propaga-. Computer Hardware Tutorial Bangla First Part. Computer Hardware Tutorial Bangla First Part. Computer HardwareComputer TipsHardware. More information .
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Download bangla book About Computer,hardware,software,Internet for Free Bangla Ebook pdf free download Ebook Pdf, Microsoft Excel, Ebooks, Software Logo Design Tutorial, Adobe Photoshop, Motion Graphics, Software, Animation. Download free courses materials, tutorials training on computer hardware in PDF files. The term computer hardware refers to the physical components of a computer. This tutorial will focus on the components that will be used on a day-to-day.
Figure A: This is what an Ethernet card looks like Modern Ethernet networks use twisted pair cabling containing eight wires. These wires are arranged in a special order, and an RJ connecter is crimped onto the end of the cable.
Figure B: This is an Ethernet cable with an RJ connector installed Hubs and Switches As you can see, computers use network cards to send and receive data. The data is transmitted over Ethernet cables. In this day and age of high speed Internet access being almost universally available, you tend to hear the term broadband thrown around a lot. Broadband is a type of network in which data is sent and received across the same wire. In contrast, Ethernet uses Baseband communications.
Baseband uses separate wires for sending and receiving data. What this means is that if one PC is sending data across a particular wire within the Ethernet cable, then the PC that is receiving the data needs to have the wire redirected to its receiving port. You can actually network two PCs together in this way.
You can create what is known as a cross over cable. A cross over cable is simply a network cable that has the sending and receiving wires reversed at one end, so that two PCs can be linked directly together.
The problem with using a cross over cable to build a network is that the network will be limited to using no more and no less than two PCs. Rather than using a cross over cable, most networks use normal Ethernet cables that do not have the sending and receiving wires reversed at one end.
Of course the sending and receiving wires have to be reversed at some point in order for communications to succeed. This is the job of a hub or a switch.
Hubs are starting to become extinct, but I want to talk about them any way because it will make it easier to explain switches later on.
There are different types of hubs, but generally speaking a hub is nothing more than a box with a bunch of RJ ports. Each computer on a network would be connected to a hub via an Ethernet cable. You can see a picture of a hub, shown in Figure C. Figure C: A hub is a device that acts as a central connection point for computers on a network A hub has two different jobs.
Its first job is to provide a central point of connection for all of the computers on the network. Every computer plugs into the hub multiple hubs can be daisy chained together if necessary in order to accommodate more computers. Right now you might be wondering how data gets to the correct destination if more than two PCs are connected to a hub. The secret lies in the network card.
When a computer on an Ethernet network transmits data across an Ethernet network containing PCs connected to a hub, the data is actually sent to every computer on the network.
As each computer receives the data, it compares the destination address to its own MAC address.
If the addresses match then the computer knows that it is the intended recipient, otherwise it ignores the data. As you can see, when computers are connected via a hub, every packet gets sent to every computer on the network.
The problem is that any computer can send a transmission at any given time.
Have you ever been on a conference call and accidentally started to talk at the same time as someone else? With this computer hardware tutorial you will master this important program and increase your chances for getting the job position that you have always wanted!
Free tutorials computer hardware - PDF. Computer Fundamentals. This PDF includes aspects of the underlying hardware as well as how we represent information, and how we can program a computer at the lowest level.
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Computer Concepts for Beginners.Home computer security. A switch, such as the one shown in Figure D, performs all of the same basic tasks as a hub.
Both PCs then have to wait for a random amount of time and attempt to retransmit the packet that was destroyed. Pretty much the only type of wired network used by small and medium sized businesses is Ethernet. How to Make a Computer Operating System. As the number of collisions increase, network efficiency is decreased. This PDF includes aspects of the underlying hardware as well as how we represent information, and how we can program a computer at the lowest level.
Basics of Computer Networking. The problem is that any computer can send a transmission at any given time.
This book is meant as a serious and more-or-less thorough text for an introductory college or graduate course in computer networks, carefully researched, with consistent notation and style, and complete with diagrams and exercises.