~~Forever In Mind~~

Microsoft Office 2007 Tutorial July 2, 2008

Di bwh ini adalah beberapa link kepada website untuk tutorial Office 2007. Sila klik website berikut untuk tutorial office 2007:

http://www.fgcu.edu/support/office2007/Word/index.asp

http://www.uwec.edu/help/word07.htm

http://www.baycongroup.com/wlesson0.htm

Good Luck!

Computers Basic April 9, 2008

Here are some of the useful websites about computers.

http://www.jegsworks.com/Lessons/index.html

http://dragon.ep.usm.edu/~it365/module/Basics/Basics.htm

http://www.computerhope.com/basic.htm

http://computer.howstuffworks.com/

Enjoy surfing!

Tips Penjagaan Laptop February 21, 2008

Penggunaan komputer riba atau lap top adalah trend masa kini. Mudah dibawa serta menampilkan gaya eksklusif. Biar pun telah lama digunakan dengan penjagaan yang sempurna ia seperti baru dibeli. Penjagaan komputer riba yang efektif memanjangkan jangka hayat penggunaannya. Ikutilah beberapa tip cara penjagaan komputer riba anda.

1. Bateri* Elakkan daripada penggunaan bateri.
* Komputer lebih sejuk tanpa haba dari bateri.
* Jika bateri sudah habis dicas, digalakkan menggunakan kuasa dari adapter.
* Pastikan bateri berada di bawah 10 peratus sebelum dicas semula.
* Jika terlalu kerap dicas, bateri akan kehilangan keupayaan menyimpan tenaga di bawah 50 peratus.

2. Papan Kekunci.
* Letakkan sekeping kertas A4 untuk papan kekunci setiap kali tidak menggunakannya untuk menghindarkan papan kekunci dimasuki habuk.
* Sesekali lapkan papan kekunci dengan perlahan-lahan. Jangan terlalu kasar untuk mengelakkan butang kekunci rosak.
* Kalau boleh gunakan papan kekunci dan tetikus berasingan supaya kita tidak terlalu kerap menggunakan papan kekunci di komputer riba.

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Penjagaan Rutin Komputer February 21, 2008

Kita sebagai pengguna komputer sering mengabaikan pengurusan atau maintenance komputer itu sendiri. Kepentingan pengurusan ini adalah untuk membolehkan komputer kita beroperasi pada kadar yang paling optimum dan memberikan kepuasan kepada kitaSeringkali kita sebagai pengguna komputer menggunakan komputer setiap hari untuk berbagai tujuan. Malah ada pula pengguna yang menjadikan komputer sebagai medium utama dalam kehidupan sehariannya. Terdapat beberapa perkara yang perlu kita lakukan sebagai langkah rutin bagi menjaga komputer ini.

a) Scan for Virus

Saban hari, terdapat beberapa virus baru dihasilkan di pasaran talian. Kesan-kesan yang dibawa oleh virus-virus ini sangat menakutkan malah ada pula yang mampu membinasakan dan merosakkan maklumat penting dalam komputer kita. Maka, perkara yang paling penting yang perlu dillakukan oleh setiap pengguna komputer bagi mengatasi gangguan virus ini ialah dengan scan virus menggunakan perisian antivirus yang telah dipasang pada sistem anda spt Norton, McAfee, PcCillin dsbnya. Lagi satu perkara penting, scan virus tanpa update perisian antivirus terlebih dahulu tiada kesannya, maka pastikan komputer anda mempunyai antivirus yang sentiasa update dan mampu mengesan kehadiran virus secara automatik. Kekerapan anda scan komputer pula bergantung kepada penggunaan talian pada komputer anda sendiri. Bagi komputer yang sentiasa berada dalam talian (online 24jam) maka scan virus merupakan suatu kemestian pada setiap hari. Anda boleh run pada waktu malam, berbanding komputer yang tidak ada talian langsung, mungkin scan keseluruhan sistem satu kali dalam seminggu sudah mencukupi.

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B1003 Unit 1 – COMPUTER SYSTEM January 25, 2008

Here are the notes for Unit 1- Computer System

Get ready for ur quiz on this topic ; = )

TQ.

Network and Communication Protocol August 16, 2007

In computing, a protocol is a convention or standard that controls or enables the connection, communication, and data transfer between two computing endpoints. In its simplest form, a protocol can be defined as the rules governing the syntax, semantics, and synchronization of communication. Protocols may be implemented by hardware, software, or a combination of the two. At the lowest level, a protocol defines the behavior of a hardware connection. Five different protocols are:

1. TCP/IP
2. FTP
3. HTTP
4. SMTP
5. POP

Network Operating System (NOS) August 16, 2007

A network operating system (NOS) is a computer operating system system that is designed primarily to support workstation, personal computer, and, in some instances, older terminal that are connected on a local area network (LAN). Here are some examples of network operating systems:

• Artisoft’s LANtastic
• Banyan VINES
• Novell’s NetWare
• Microsoft’s LAN Manager

In addition, some multi-purpose operating systems, such as Windows NT and Digital’s OpenVMS come with capabilities that enable them to be described as a network operating system. A network operating system provides printer sharing, common file system and database sharing, application sharing, and the ability to manage a network name directory, security, and other housekeeping aspects of a network.

Click here for details: http://fcit.usf.edu/network/chap6/chap6.htm

Hardware used in a network and their functions August 16, 2007

• Controller – e.g. Intel (ie0 – Sun3, Sun4), Lance (le0 – Sun4m, Sun4c, Sun3/50, Sun3/60).
• Transceiver Cable – connects the controller to the transceiver box.
• Transceiver Box – electrically isolates the system from the rest of the network.
• Coaxial Cable – the ethernet backbone.
• Switch – examines the data packet to determine the destination, then sends the packet only over the segment hosting the recipient machine. If the packet is addressed to a machine on the same segment, the packet never leaves that segment. This minimizes traffic on the network segments that don’t need to see the packet.
• Bridge – operates at the Data Link layer. Designed for transparent connection of networks. Bridges and Switches allow you to break the network into smaller segments that increase the overall throughput of the total network.
• Router – joins 2 networks at the network layer; forwards packets of a particular protocol from one subnet to another; translates messages between different protocols, e.g. DECnet and TCP/IP.
• Gateway – joins different types of networks; translates one protocol into another, e.g. between OSUs SONNET backbone and the local subnets.
• Terminal Server – attach systems on a local area network to serial devices, e.g. terminals and printers; may support LAT and Telnet protocols.

Types of Network Typologies August 16, 2007

In networking, the term “topology” refers to the layout of connected devices on a network. One can think of a topology as a network’s virtual shape or structure. This shape does not necessarily correspond to the actual physical layout of the devices on the network. For example, the computers on a home LAN may be arranged in a circle in a family room, but it would be highly unlikely to find an actual ring topology there. Network topologies are categorized into the following basic types : bus, ring, star, tree, mesh. More complex networks can be built as hybrids of two or more of the above basic topologies.

Bus Topology

Bus networks use a common backbone to connect all devices. A single cable, the backbone functions as a shared communication medium that devices attach or tap into with an interface connector. A device wanting to communicate with another device on the network sends a broadcast message onto the wire that all other devices see, but only the intended recipient actually accepts and processes the message. Bus networks work best with a limited number of devices. If more than a few dozen computers are added to a network bus, performance problems will likely result. In addition, if the backbone cable fails, the entire network effectively becomes unusable.

Ring Topology

In a ring network, every device has exactly two neighbors for communication purposes. All messages travel through a ring in the same direction (either “clockwise” or “counterclockwise”). A failure in any cable or device breaks the loop and can take down the entire network. Ring topologies are found in some office buildings or school campuses.

Star Topology

Many home networks use the star topology. A star network features a central connection point called a hub that may be a hub, switch or router. Devices typically connect to the hub with Unshielded Twisted Pair (UTP) Ethernet. Compared to the bus topology, a star network generally requires more cable, but a failure in any star network cable will only take down one computer’s network access and not the entire LAN.

Tree Topology

Tree topologies integrate multiple star topologies together onto a bus. In its simplest form, only hub devices connect directly to the tree bus, and each hub functions as the “root” of a tree of devices. This bus/star hybrid approach supports future expandability of the network much better than a bus (limited in the number of devices due to the broadcast traffic it generates) or a star (limited by the number of hub connection points) alone.

Mesh Topology

Mesh topologies involve the concept of routes. Unlike each of the previous topologies, messages sent on a mesh network can take any of several possible paths from source to destination. Some WANs, most notably the Internet, employ mesh routing. A mesh network in which every device connects to every other is called a full mesh. As shown in the illustration below, partial mesh networks also exist in which some devices connect only indirectly to others.

Types of Networking August 16, 2007

One way to categorize the different types of computer network designs is by their scope or scale. For historical reasons, the networking industry refers to nearly every type of design as some kind of area network. Common examples of area network types are:

• LAN – Local Area Network
• WLAN – Wireless Local Area Network
• WAN – Wide Area Network
• MAN – Metropolitan Area Network
• SAN – Storage Area Network, System Area Network, Server Area Network, or sometimes Small Area Network
• CAN – Campus Area Network, Controller Area Network, or sometimes Cluster Area Network
• PAN – Personal Area Network
• DAN – Desk Area Network

LAN and WAN were the original categories of area networks, while the others have gradually emerged over many years of technology evolution. For more details, click the link below:
http://compnetworking.about.com/od/basicnetworkingconcepts/a/network_types.htm