 Sekarang, segera. Sekarang kita bergerak kepada sebuah seksan yang awak perlukan, yang adalah kategori network. Kategori network boleh digetakkan, tapi walaupun jika yang berada di dalam keterangan, kawasan perang, dan sebuah akitektur. Jadi, mereka adalah sebuah kategori network yang serbuk yang berjaya, yang pertama adalah kawasan perang, yang kedua adalah kawasan perang, yang ketiga adalah kawasan merajuan, dan yang terakhir adalah kawasan wajar, network wide area. Okey, so these are the summary of the four common categories of network. So we go to the first one, a local area network. A local area network is usually privately owned and link the devices in a single office building or campus as you can see in our summary here. Depending on the needs of an organization and the type of technology used, a LAN can be as simple as two PCs and a printer in someone's home office or it can extend throughout a company and include audio and video peripheral. Currently, LAN size is limited to only few kms. The second one we go to the wide area network. A wide area network provides a long distance transmission of data, image, audio and video information. Over large geographic area that may comprise a country, a continent or even the whole world. A one can be as complex as the backbone that connects the internet or as simple as a dial up line that connects a home computer to the internet. What about the Metro Polyton Area Network or AMAN? AMAN is a network with a size between a LAN and a one. It normally covers the area inside a town or a city. It is designed for customers who need a high speed connectivity normally to the internet and have end point spread over a city or part of a city. Example is a cable TV network that originally was designed for cable TV but today can also be used for high speed data connection to the internet. And the last one is your personal area network. A personal area network covers a devices such as computer, telephone and personal digital assistance, PDA, your smartphone, speakers, which are actually connected together to form a network. It is designed for personal use with limited range which is actually less than 100 metres. Wireless PAN or WAPAN use wireless network technology such as infrared, Bluetooth, etc. So to conclude, we have looked at the basic concept of data communication, the different type of network topologies and its transmission mode and lastly the category of network. That's all for now. Thank you.