jaringan komputer

Jaringan komputer
Jaringan Komputer adalah suatu sistem yang terdiri perangkat computer dan perangkat jaringan yang bekerja sama untuk mencapai tujuan yang sama.

Lingkup Jaringan Komputer
Jaringan computer dapat terdiri dari beberapa computer ribuan computer. Jaringan computer ini juga dapat menempati suatu ruangan kecil atau sebuah bangunan yang terdiri atas puluhan lantai , atau bahkan meliputi seluruh dunia. Berdasarkan jumlah terminalnya, jaringan computer dapat digolongkan ke dalam tiga jenis, yaitu LAN, MAN, WAN.

a. LAN(Local Area Network)
LAN adalah jaringan computer yang mencakup lingkungan terbatas, misalnya satu ruang di suatu kantor, atau suatu lantai di suatu bangunan. Antarkomputer bias dihubungkan dengan kabel atau dengan media komunikasi lainnya (misalnya jaringan nirkabel).

b. MAN(Metropolitan Area Network)
MAN adalah jaringan computer yang mencakup satu kota. Jaringan ini biasanya terdapat di suatu lingkungan yang cukup luas, misalnya perguruan tinggi yang memiliki beberapa gedung untuk masing-masing fakultas, atau perusahaan dengan beberapa cabang di sebuah kota, atau beberapa perusahaan yang saling bekerja sama. Layanan informasi hotel atau pariwisata di suatu kota, yang terhubung antara satu hotel dengan hotel lain, atau layanan penjualan beberapa restoran siap saji di suatu kota, merupakan contoh jaringan bentuk ini.

c. WAN(Wide Area Network)
WAN adalah jaringan computer yang mencakup wilayah yang sangat luas, misalnya suatu propinsi, suatu Negara, atau bahkan kumpulan beberapa Negara. Antara satu terminal dengan terminal lainnya, seringkali sudah tidak dapat dihubungkan dengan kabel, misalnya saja antar Jakarta dengan kupang. Hubungan harus dilakukan melalui satelit. Contoh penerapan jaringan ini adalah internet. Internet (International Network) adalah contoh jaringan computer yang menjangkau berbagai computer dan user di seluruh penjuru dunia.

Topologi Jaringan Komputer
Antarkomputer harus saling dihubungkan dalam satu jaringan computer . Hubungan antarkomputer dapat bervariasi bentuknya, yaitu : star,ring,bus.

a. Topologi Star (bintang)
Topologi ini disebut star karena skema dari topologi ini berbentuk mirip dengan bintang. Topolog ini memerlukan server atau computer pusat untuk mengendalikan semua terminal. Terminal adalah anggota jaringan dan dapat berbentuk computer, printer, notebook, bahkan telepon seluler. Topologi ini sering dipakai oleh para perancang jaringan, karena hubungan antara satu terminal dengan terminal lainnya relative pendek. Hal ini yang menjadi keunggulan topologi star(bintang). Antara satu terminal dapat berkomunikasi dengan terminal yang lain hanya melewati server. Tetapi topologi ini memiliki kelemahan yaitu server memerlukan computer dengan konfigurasi yang cukup berlebih, karena kekuatannya akan digunakan juga oleh terminal lain yang ada di jaringan.

b. Topologi Ring
Antara satu terminal dengan terminal yang lain tidak memerlukan server dan saling berhubungan dengan terminal di kanan kirinya. Keunggulan yang dimiliki topologi cincin adalah tidak memerlukan computer pusat (server). Kelemahannya yaitu satu terminal harus diapit oleh dua terminal lain yang juga harus dalam kondisi hidup. Apabila dua computer yang mengapit suatu terminal dalam posisi mati (off), maka terminal tersebut tidak dapat berhubungan dengan terminal lainnya.

c. Topologi Bus
Topologi bus adalah salah satu topologi yang cukup sederhana, karena terminal dihubungkan dengan satu jalur utama. Untuk menghubungkan terminal ke jalur utama, hanya diperlukan konektor saja.

Kabel
Media komunikasi data yang paling konvensional dan saat ini masih cukup banyak digunakan adalah kabel. Kabel ada bermacam-macam bentuknya, yaitu:
a. Kabel UTP (Universal Twisted Pair).
Kabel ini banyak digunakan pada pesawat telepon tetap (PSTN atau public switching telephone network) dan jaringan computer. Kabel ini tidak begitu besar ukuran fisiknya, relative mudah dipasang di berbagai alur dinding atau lantai, harganya relative murah, dan mampu menghantarkan data dengan kecepatan cukup tinggi.
b. Kabel co-axial
Kabel jenis ini berbentuk bulat dan terdiri atas bagian tengah sebagai inti. Kabel ini biasanya dipakai untuk antena televisi, antenna pesawat komunikasi (HT dan rig), serta jaringan computer. Keunggulan kabel ini adalah kemampuannya untuk menghantarkan data dalam jumlah besar dengan kecepatan tinggi. Sayangnya kabel jenis co-ax ini memiliki kelemahan utam yaitu, bentuknya relative besar (kurang lenih sebesar pensil) dan agak kaku, sehingga sulit diletakkan sesuai dengan lantai atau dinding yang dilaluinya.
c. Kabel optic(fiber optic)
Adalah kabel yang terbuat dari serat kaca. Kabel serat optic mirip dengan kkabel biasa, hanya saja bagian di dalamnya terbuat dari serat kaca yang sangat halus. Keunggulan serat kaca adalah dapat menghantarkan data hamper tanpa hambatan, sehingga sekarang ini kabel optic sering digunakan untuk membangun jaringan computer dengan banyak terminal dengan jarak yang relative berajauhan, seperti di kampus yang terdiri atas beberapa bangunan dan pabrik yang memiliki beberapa lokasi produksi. Kabel ini bersifat fleksibel (mudah mengikuti kontur lokasi) tetapi memiliki kelemahan, yaitu harganya yang relative lebih mahal disbanding kabel jenis lain.

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Healthy With Lime

Besides becoming syrup, juice water of sour taste like lime become other cookery mixture or beverage. The reason is lime do not only can become refreshing beverage, but also contains drug special quality. Lime ( Citrus aurantifolia Swingle) be clump plant with many branch. This crop many planted in lawn and garden.

Height of can be reach six metre. Its(the leaf is globular egg and every leaf handle leaf. Its(the interest is white having colour radiant. Its(the bar hardwood, and usually bears fruit after 2,5 years. Its(the fruit is globular with slippery surface, having skin thin, and having colour stripper chartreuse if it is. This crop anticipated comes from India area north side.

Its(the fruit contains is juicy and ascorbic acid that is enough is height. Leaf, fruit, and its(the interest is oleaginous flown. Usually lime grows carefully in lowland area which many hit [by] sunshine. Acidulous lime of citrate, amino acid ( tryptophan, lisin), essential oils ( citral, limonen, felandren, camphor lemon, kadinen, gerani-lasetat, linali-lasetat, aktilaldehid, nnildehid) resin, glycoside, acid sitrun, fat, calcium, phosphorus, iron, vitamin brimstone B1 and C.

Sour lime taste can assist cleans nicotine found on tooth and man mouth is liking smoking. From contents of various oils and matter in it, lime exploited to overcome dysentery, constipation, spasmodic menstruation, diphtheria, pimple, confused head or vertigo, throatiness, coughs, body odour, adds appetite, prevents hair to moult, dandruff, flu, fever, too fat, tonsil, nosebleed, and chafes nose.

From some last research shows, lime also has benefit to prevent calculus relapsing, especially idiopathic calcium calculus. According to the report, consumes lime can prevent incidence [of] calculus. This thing confessed by Renal RS Dr Sardjito, Yogyakarta, Prof DR Mochammad Sja'bani.
At the research it is known that lime contains high citrate, while many calculus patients has low citrate rate. He tells local lime citrate content ( Citrus aurantifolia Swingle which is circular) 10 bigger times compared to citrate content at tangerine, or six times beloved orange. Its(the citrate content reaching 55,6 grams per kilogram.
In general citrate in water urine at lowest calculus patient at night and early morning. Hence giving of nicer lime consumed to be momentary after dinner. Juice of lime consumed after dinner the is reported do not generate stomach sigh. Juice water two the lime thinned in two water glasses.

Drinks this orange mixture can reduce and prevents relapsing of idiopathic calcium calculus. This disease prevention needs because this type found at around 80 % calculus patient. But, preventive effort and therapy of this disease done by the way of limiting consumption of salt or saline food, gives calcium input that is enough,

" Petai ", The Smell is Bad But Have Special Quality .

You are of all surely recognizes that "petai" as fruit making aroma more bad. But possible many between you doesn't know that "petai" contains 3 kinds of natural sugar that is sucrose, fructose and glucose combine with fibre.

Combination of This content can give motivation of instant energy, but sufficiently long and enough big of its. Research proves two portions pete can give enough energy to do heavy activity during 90 minutes.


Research also prove that "petai" is not only give energy, but also can prevent overcomes some kinds of disease and ugly condition. This makes pete becomes one of important food in food all day long.

Depression
According to survey done by MIND between depression patient, many people feels is better after eating pete. This thing happened because "petai" to contain tryptophan, of a kind protein changed by body to become serotonin. This will make relax, improve and repairs mood and in general makes happier someone.

PMS ( premenstrual syndrome)
If experiencing PMS when ' guest ' comes, you are not necessarily drink this pill and or that, enough overcomes by eating "petai". Vitamin B6 contained by "petai" to arrange blood sugar rate, what can assist mood.

Anemia
With high content, "petai" can stimulate produce of red blood cell and assists in the event of anaemia.

High blood pressure
Tropical fruit of this very on unique potassium height, but low of salt, so that very perfecting to fight blood pressure. So height, so that FDA America permits plantation of "petai" to do formal claim about ability of this fruit to reduce blood pressure risk and stroke.

Brain ability
200 students in Twickenham helped easily through test in this year because eating "petai" at the time of breakfast, rest , and lunch. Research has prove that fruit with high potassium content can assist learning by assisting student increasingly attentive.

Drunken drug
One of fastest way to heal " disease" drunken is milkshake "petai", sweet with honey. "Petai" will assist makes calm stomach and with help of honey will increase falling blood sugar rate, while milk will make calm and back improve dilution rate in body.

Mosquito bite
Before you reach for mosquito bite cream, tries to rub area hit by bite with skin interior "petai". Many people successfully overcomes feeling an itch and swelling in this way.

Fatness
Research in Institute of Psychology Austria finds that pressure at the time of job(activity causes people often reach for food making calm like chocolate and flaky. By laying eyes on 5000 patients in hospital, researcher finds that most people gets heavy because high working pressure.

Arranges body temperature
Many other cultures seeing "petai" as fruit " cool " capable to reduce body temperature and emotion of mother waiting birth of the child. In Dutch for example, pregnancy mother will eat "petai" to assure that the baby born with temperature is not height.

Smoking
"Petai" can help man which wish to desist smoking. Vitamin B6 and B12 contained by it, together with potassium and magnesium, assists body quickly recovers from nicotine stop effect

Stress
Potassium is important mineral, which assists to normal of heart tick, sends oxygen to brain and arranges body fluid balance. When us stress, speed of metabolism we will increase, so that will lessen potassium rate in body. This thing can be balanced again with help of eats petai which high of potassium.

Stroke
According to research in " The New England Journal of Medicine, eats "petai" as part of everyday food will reduce death risk because stroke until 40%.

Tick
They liking looks away at natural therapy would dare to swear, if you wish to kill tick, taking "petai", and puts down in that tick. Remain to maintains pete by using plaster!. After reading all facts you must believe that "petai" is nature drug to assorted of disease. If you compares it with apple, "petai" has protein 4 more times, carbohydrate twice the many, treble of phosphorus, fivefold Vitamin A, and twofold number of other vitamins and mineral.

"Petai" also rich potassium and is fruit of with best food value. So possible now it's the moment you changes famous have been words about the apple becomes: " A Petai a day keeps the doctor away". OK, sorry if i do the possible mistake , and let's try "petai" .

xxx syanne xxx

Avoid Influenza With Wash Your Hand .

Every mom not wrong, if they command us to wash hand . Follow with some doctor , that habit can protect us with disease . Before doing activity , you must wash your hand . Because it can keep us for every virus in this world . Influenza can easy infected in every human , but you don't must go to the doctor . You can prevent influenza with nature way .

This is a way to prevent if influenza :
1. Eat one orange for one day .
2. Take a rest .
3. Lose your stress, stress can make everything worst .
4. Eat white onion every day .
5. Drink more and more a glass of water .
6. Before do the activity, wash your hand with soap so that can make us prevent with bacteria.
7. Do some exercise .
8. Keep your body warm .
9. Drink carrot juice .
10.Don't smoking .
11. Keep your positive thinking .


So , all of you now always don't forget to wash your hand before do the activity . Now , the weather going bad and more bad every single day . You must smart to protect your body , you just and must follow the eleven way . Thank you , i hope this article can be useful for all .

xxx Anne xxx

Save Our Earth !

Now you must save our earth, it is for now and for our next life . We can save with little part , example : do not throw away garbage in every place , don't use air conditioner .Sometimes we don't know it will better or bad for us .Let me know, that the air now get hot and more hot than before. It balance in 2040 mountain ice in pole will if global warming more worse and worse .What will happen to earth if all really happen in our world.This all can make human starving in every world, million people will tear food and water.Oh my god, can't you believe if all that happen to us, it will be the day of judgment.Now you must immediately save our earth, save the rain forest and ourselves.You must promise for yourself to keep all clean and let's get planting !.You must conscious how very important the earth for our life.Who will keep the earth except us .

Breast Cancer

Breast cancer is a vicious tumor and being grow up in your net in your breast. Especially cancer can be affected in female, but male can be affected to. Even male possible more less appeal with female. If you addopt this cancer now you must go to the doctor and do what suggestion from doctor, you must follow a medicinal treatment.
This is a several factor breast cancer :
1. Age
2. Have been addopt this cancer
3. History of a family
4. Factor genetics and hormone
5. Material of chemistry
This is some indication, is protruding tumor. But, we can prevent this cancer there are organize pattern in your life. Even that indication is not be in your body, you still must check up to the doctor. I'm suggestion you to protect your body before you regret , organize your life be better than before.

im suggest it because , it is based on my experience .