Ada beberapa cara dalam pemasangan kabel jaringan, yaitu :
1. Straight Through Cable
biasanya digunakan untuk menghubungkan beberapa unit komputer melalui perantara HUB / Switch yang berfungsi sebagai konsentrator maupun repeater.
Penggunaan kabel UTP model straight through pada jaringan lokal biasanya akan membentuk topologi star (bintang) atau tree (pohon) dengan HUB/switch sebagai pusatnya. Jika sebuah HUB/switch tidak berfungsi, maka seluruh komputer yang terhubung dengan HUB tersebut tidak dapat saling berhubungan.
- Penggunaan Straight Through Cable :
o PC | Hub
o PC | Switch
o Hub | Hub
o Switch | Router
Rabu, 24 November 2010
Blekko, Mesin Pencari Baru Saingan Google
Pesaing di dunia mesin pencari kini bertambah satu. Google masih menjadi 'raja'nya dengan menguasai 65 persen di ranah situs pencarian, diikuti dengan Yahoo search, Bing dari Microsoft dan satu lagi Blekko.
Meskipun menjadi pendatang baru di belantara mesin pencari, Blekko yang bermarkas di Silicon Valley, California ini optimistis bisa bersaing dengan sejumlah perusahaan raksasa search engine dengan keunikan tersendiri.
Menurut Rich Skrenta, pendiri sekaligus Chief Executive Officer (CEO) Blekko, daring pencari ini akan menampilkan hasil yang lebih bersih dari spam dan website yang dijamin aman untuk dikunjungi. "Kami akan menyajikan sumber-sumber informasi terbaik bagi pengguna," katanya.
Rabu, 17 November 2010
Top 10 Cities to Live in The World
Here’s a list of best cities to live in the world. Living in a good environment can be one of the reason people can enjoy life and have a longer age. These cities have very good living environment and based on the recent survey from The Economist’s become the best cities to live (most liveable) in the world. Maybe you should consider to ask moving services company to start moving your belonging to one of these cities so you can start living in the best cities to live in the world
Maybe you wondering about the criteria of choosing these cities, here’s the criteria of choosing these cities
1. Availability of basic community needs (building, water supply, electricity, etc.)
2. Availability of public facilities (parks, sidewalks, houses of worship, etc.)
3. Availability of facilities to support the economic sector, social, political, and cultural
4. Availability of space and place to interact and develop
5. Comfort, safety, physical beauty, as well as the progress of development and environment-friendly technology
10. Auckland, New Zealand
Auckland lies between the Hauraki Gulf of the Pacific Ocean to the east, the low Hunua Ranges to the south-east, the Manukau Harbour to the south-west, and the Waitakere Ranges and smaller ranges to the west and north-west. The central part of the urban area occupies a narrow isthmus between the Manukau Harbour on the Tasman Sea and the Waitemata Harbour on the Pacific Ocean. It is one of the few cities in the world to have harbours on two separate major bodies of water.
9. Adelaide, Australia
Adelaide is the capital and most populous city of the Australian state of South Australia, and is the fifth-largest city in Australia, with a population of more than 1.28 million. It is a coastal city situated on the eastern shores of Gulf St Vincent, on the Adelaide Plains, north of the Fleurieu Peninsula, between Gulf St Vincent and the low-lying Mount Lofty Ranges. The suburbs reach roughly 20 km (12 mi) from the coast to the foothills but sprawl 100 km (62 mi) from Gawler at its northern extent to Sellicks Beach in the south. Today, Adelaide is noted for its many festivals and sporting events, its food, wine and culture, its long beachfronts, and its large defence and manufacturing sectors.
8. Perth, Australia
Perth is the capital and largest city of the Australian state of Western Australia. With a population of 1,659,000 (2009), Perth ranks fourth amongst the nation’s cities, with a growth rate consistently above the national average.
The metropolitan area is located in the south-west of the continent between the Indian Ocean and a low coastal escarpment known as the Darling Range. The central business district and suburbs of Perth are situated on the Swan River. Perth is tied for ninth place in The Economist’s 2010 list of the World’s Most Livable Cities.
Perth became known worldwide as the “City of Lights” as city residents lit their house lights and streetlights as American astronaut John Glenn passed overhead while orbiting the earth on Friendship 7 in 1962. The city repeated its feat as Glenn passed overhead on the Space Shuttle in 1998.
Maybe you wondering about the criteria of choosing these cities, here’s the criteria of choosing these cities
1. Availability of basic community needs (building, water supply, electricity, etc.)
2. Availability of public facilities (parks, sidewalks, houses of worship, etc.)
3. Availability of facilities to support the economic sector, social, political, and cultural
4. Availability of space and place to interact and develop
5. Comfort, safety, physical beauty, as well as the progress of development and environment-friendly technology
10. Auckland, New Zealand
Auckland lies between the Hauraki Gulf of the Pacific Ocean to the east, the low Hunua Ranges to the south-east, the Manukau Harbour to the south-west, and the Waitakere Ranges and smaller ranges to the west and north-west. The central part of the urban area occupies a narrow isthmus between the Manukau Harbour on the Tasman Sea and the Waitemata Harbour on the Pacific Ocean. It is one of the few cities in the world to have harbours on two separate major bodies of water.
Auckland
Adelaide is the capital and most populous city of the Australian state of South Australia, and is the fifth-largest city in Australia, with a population of more than 1.28 million. It is a coastal city situated on the eastern shores of Gulf St Vincent, on the Adelaide Plains, north of the Fleurieu Peninsula, between Gulf St Vincent and the low-lying Mount Lofty Ranges. The suburbs reach roughly 20 km (12 mi) from the coast to the foothills but sprawl 100 km (62 mi) from Gawler at its northern extent to Sellicks Beach in the south. Today, Adelaide is noted for its many festivals and sporting events, its food, wine and culture, its long beachfronts, and its large defence and manufacturing sectors.
Adelaide
Perth is the capital and largest city of the Australian state of Western Australia. With a population of 1,659,000 (2009), Perth ranks fourth amongst the nation’s cities, with a growth rate consistently above the national average.
The metropolitan area is located in the south-west of the continent between the Indian Ocean and a low coastal escarpment known as the Darling Range. The central business district and suburbs of Perth are situated on the Swan River. Perth is tied for ninth place in The Economist’s 2010 list of the World’s Most Livable Cities.
Perth became known worldwide as the “City of Lights” as city residents lit their house lights and streetlights as American astronaut John Glenn passed overhead while orbiting the earth on Friendship 7 in 1962. The city repeated its feat as Glenn passed overhead on the Space Shuttle in 1998.
Jumat, 05 November 2010
Salah Ketik Alamat Situs Bisa Berujung Penipuan
Jaringan Komputer
Jaringan
Jaringan adalah sebuah sistem yang terdiri atas komputer, software dan perangkat jaringan lainnya yang bekerja bersama-sama untuk mencapai suatu tujuan yang sama. Tujuan dari jaringan komputer adalah:
- Membagi sumber daya: contohnya berbagi pemakaian printer, CPU, memori, harddisk
- Komunikasi: contohnya surat elektronik, instant messaging, chatting
- Akses informasi: contohnya web browsing
Agar dapat mencapai tujuan yang sama, setiap bagian dari jaringan komputer meminta dan memberikan layanan (service). Pihak yang meminta/menerima layanan disebut klien (client) dan yang memberikan/mengirim layanan disebut pelayan (server). Arsitektur ini disebut dengan sistem client-server, dan digunakan pada hampir seluruh aplikasi jaringan komputer.
Klasifikasi
Berdasarkan skala :
- Local Area Network (LAN): suatu jaringan komputer yang menghubungkan suatu komputer dengan komputer lain dengan jarak yang terbatas.
- Metropolitant Area Network (MAN): prinsip sama dengan LAN, hanya saja jaraknya lebih luas, yaitu 10-50 km.
- Wide Area Network (WAN): jaraknya antar kota, negara, dan benua. ini sama dengan internet.
Berdasarkan fungsi : Pada dasarnya setiap jaringan komputer ada yang berfungsi sebagai client dan juga server. Tetapi ada jaringan yang memiliki komputer yang khusus didedikasikan sebagai server sedangkan yang lain sebagai client. Ada juga yang tidak memiliki komputer yang khusus berfungsi sebagai server saja. Karena itu berdasarkan fungsinya maka ada dua jenis jaringan komputer:
- Client-server
- Yaitu jaringan komputer dengan komputer yang didedikasikan khusus sebagai server. Sebuah service/layanan bisa diberikan oleh sebuah komputer atau lebih. Contohnya adalah sebuah domain seperti www.detik.com yang dilayani oleh banyak komputer web server. Atau bisa juga banyak service/layanan yang diberikan oleh satu komputer. Contohnya adalah server jtk.polban.ac.id yang merupakan satu komputer dengan multi service yaitu mail server, web server, file server, database server dan lainnya.
- Peer-to-peer
- Yaitu jaringan komputer dimana setiap host dapat menjadi server dan juga menjadi client secara bersamaan. Contohnya dalam file sharing antar komputer di Jaringan Windows Network Neighbourhood ada 5 komputer (kita beri nama A,B,C,D dan E) yang memberi hak akses terhadap file yang dimilikinya. Pada satu saat A mengakses file share dari B bernama data_nilai.xls dan juga memberi akses file soal_uas.doc kepada C. Saat A mengakses file dari B maka A berfungsi sebagai client dan saat A memberi akses file kepada C maka A berfungsi sebagai server. Kedua fungsi itu dilakukan oleh A secara bersamaan maka jaringan seperti ini dinamakan peer to peer.
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