Media Transmisi Pada Jaringan Komputer

Media yang digunakan pada jaringan komputer ada berbagai macam jenis dari yang penghantarnya pendek hingga jauh, dari yang penghantarnya lambat hingga cepat. Berikut ini jenis - jenis yang umum dipakai :

1. Thin Ethernet (Thinnet)
Thin Ethernet atau Thinnet memiliki keunggulan dalam hal biaya yang leratif lebih murah dibandingkan dengan tipe pengkabelan lain, serta pemasangan komponennya lebih murah. Panjang kabel Thin Coaxial/RG-58 antara 0.5 - 185 m dan maksimum 30 komputer terhubung.

2. Thick Ethernet (Thicknet)
Dengan Thicknet atau Thick Ethernet, jumlah komputer yang dapat dihubungkan dalam jaringan akan lebih banyak dan jarak antara komputer dapat lebih besar, tetapi biayanya lebih mahal dibandingkan dengan Thinnet. Pada Thicknet digunakan transceiver untuk menghubungkan setiap komputer dengan sistem jaringan. panjang kabel transceiver maksimumnya 50m, panjang kabel Thick Ethernet 500m dengan maksimum 100 tranceiver terhubung.

3. Twisted Pair Ethernet
Kabel ini mirip dengan kabel pada telepon rumah. kabel ini mempunyai 2 jenis yaitu :
> Shielded Twisted Pair (STP), kabel dengan selubung pembungkus
> Unshielded Twisted Pair (UTP), kabel tanpa menggunakan selubung pembungkus.
yang sering digunakan pada jaringan yaitu kabel Unshielded Twisted Pair (UTP).

4. Fiber Optic
Jaringan yang menggunakan Fiber Optic (FO) biasanya pada perusahaan besar, dikarenakan harga dan proses pemasangannya lebih sulit. Namun demikian, jaringan yang menggunakan FO dari segi kecepatan tidak diragukan lagi. kecepatan pengiriman data dengan media FO lebih dari 100 Mbps dan bebas pengaruh lingkungan.

5. WLAN
pada WLAN, alat untuk mentransmisikan data disebut dengan Access Point dan terhubung dengan jaringan LAN melalui kabel. Fungsi dari Access Point ini adalah mengirim dan menerima data, sebagai buffer data antara WLAN dan Wired LAN, mengkonversi sinyal frekuensi radio (RF) menjadi sinyal digital yang akan disalurkan keperangkat WLAN yang lain dengan dikonversi ulang menjadi sinyal frekuensi radio.
Satu Access Point dapat melayani hingga 30 user. Bila semakin banyak user dalam satu Access Point maka kecepatan yang diperoleh tiap - tiap user akan kecil. Agar kecepatan dalam Access Point cepat maka sebaiknya dalam satu Access Point kurang dari 30 user.

Udah ah segitu dulu, Semoga bermanfaat

Virtual Box 3.0.8

Innotek VirtualBox adalah sebuah keluarga yang kuat virtualisasi x86 produk untuk perusahaan maupun rumah digunakan.

Ditargetkan pada server, desktop dan tertanam digunakan, sekarang satu-satunya berkualitas profesional solusi virtualisasi yang juga Open Source Software.

Beberapa fitur pada VirtualBox 3 adalah:

* Modularity. VirtualBox memiliki desain modular yang sangat baik didefinisikan dengan pemrograman internal dan antarmuka klien / server desain. Hal ini membuat mudah untuk mengendalikannya dari beberapa interface sekaligus: misalnya, Anda dapat memulai mesin virtual di mesin virtual yang khas GUI dan kemudian mengendalikan mesin itu dari baris perintah, atau mungkin dari jarak jauh. VirtualBox juga datang dengan penuh Software Development Kit: meskipun itu adalah Open Source Software, anda tidak? T telah meng-hack sumber untuk menulis sebuah antarmuka baru untuk VirtualBox.

* Mesin virtual deskripsi dalam XML. Pengaturan konfigurasi mesin virtual akan disimpan seluruhnya dalam XML dan tidak bergantung pada mesin lokal. Definisi mesin virtual sehingga dapat dengan mudah porting ke komputer lain.

* Guest Additions untuk Windows dan Linux. VirtualBox memiliki software khusus yang dapat diinstal dalam Windows dan Linux mesin virtual untuk meningkatkan kinerja dan membuat integrasi jauh lebih halus. Di antara fitur yang disediakan oleh Guest Additions ini adalah integrasi penunjuk mouse layar dan sewenang-wenang solusi (misalnya dengan mengubah ukuran jendela tamu).

Saat ini, VirtualBox berjalan pada Windows dan Linux 32-bit host dan mendukung sejumlah sistem operasi tamu termasuk tetapi tidak terbatas pada Windows (NT 4.0, 2000, XP, Server 2003, Vista), DOS / Windows 3.x, Linux ( 2.4 dan 2.6), dan OpenBSD.

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Sumber: Tissueonline

GetDataBack 4.0

GetDataBack akan membantu Anda mengambil file Anda jika hard drive\s tabel partisi, boot record, FAT, atau direktori root telah rusak oleh virus, format, fdisk atau kegagalan daya.

GetDataBack for FAT & NTFS 4,0 bahkan bisa mendapatkan kembali data anda ketika drive tidak lagi diakui oleh Windows.

yang dapat disembuhkan oleh GetDataBack :

* Hard drives (IDE, SCSI, SATA)
* USB drives
* Firewire drives
* Partitions
* Dynamic Disks
* Floppy drives
* Drive images
* Zip/Jaz drive
* Compact Flash Cards
* Smart Media Cards
* Secure Digital Cards
* USB Flash Drive
* iPod Disks

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Sumber : www.tissueonline.com

Mengoptimalkan Adobe Reader

Adobe Reader memang telah melakukan beberapa modifikasi pembaruan sehingga versi terbarunya mampu membuka dan menavigasi dokumen lebih gegas daripada versi terdahulu. Biarpun demikian, sebagian pengguna menilai aplikasi ini masih lambat sehingga lebih memilih aplikasi sejenis lainnya.

Sebenarnya ada beberapa trik sederhana untuk lebih mengoptimalkan kinerja Adobe Reader. Berikut adalah trik-triknya.
1. Hapus plug-in yang tidak dibutuhkan.

Sebelum menghapus, Anda harus memeriksa dulu deskripsi tiap plug-in untuk menghindari kesalahan dalam penghapusan. Jangan sampai Anda menghapus plug-in yang sifatnya esensial sehingga dokumen justru tidak bisa dibuka sama sekali. Untuk melakukannya, klik “Help” pada jendela aplikasi, dan pilih “About Adobe Plug-Ins…”. Informasi plug-in akan langsung tampil beserta ketergantungannya terhadap plug-in lainnya. Catat bila perlu.

Berbekal informasi ini Anda lalu bisa masuk ke direktori Adobe Reader. Carilah folder bernama plug_ins. Hapus semua plug-in yang tidak dibutuhkan. Misalnya jika PC Anda tidak memiliki koneksi Internet, hapuslah plug-in semacam Updater dan SendMail. Sebelumnya buatlah back-up untuk berjaga-jaga.

2. Rampingkan beban start-up.

Klik “Edit > Preferences…”, lalu pilih opsi “Startup”. Hilangkan tanda centang pada “Display splash screen” dan “Show Messages and automatically update”.

3. Turunkan Resolusi.
Masih di jendela Preferences, klik opsi “Page Display”. Turunkan nilai resolusi dengan mengklik opsi Custom Resolution. Beri nilai yang lebih rendah dari nilai standarnya.

4. Sembunyikan seluruh toolbar dengan mengklik “F8” atau klik menu “View > Toolbars”, dan “Hide Toolbars”. Sebagai gantinya manfaatkanlah keyboard shortcut. Daftar shortcut bisa dilihat di menu “Help”.


Sumber :
1. PCplus
2. Kompas

Scope

Lagunya enak-enak, coba aja dengerin....


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Model - Model Jaringan Komputer

Pada sistem komputer terdapat beragam jenis Jaringan Komputer yang pembagiannya didasarkan pada besar kecilnya cakupan jaringan yang menghubungkan antar komputer satu dengan yang lainnya. Jenis - jenis jaringan ada 3 macam yaitu :

1. LAN (Local Area Network)

LAN adalah jaringan yang dibatasi dengan ruang lingkup yang kecil, seperti Perkantoran, sekolah, kost-kost an. secara garis besar LAN terdapat dua tipe yaitu :

• Peer to Peer

Pada jaringan ini setiap komputer bisa sebagai client ataupun server.

• Client Server

Pada jaringan ini hanya ada satu komputer yang bertindak sebagai server dan komputer yang lainnya hanya sebagai Client.

Biasanya kebanyakan LAN menggunakan media kabel untuk menghubungkan antar komputer satu dengan yang lainnya.

2. MAN (Metropolitan Area Network)

MAN biasanya meliputi area yang lebih besar dari pada LAN, misalnya antar wilayah dalam satu privinsi. Dalam hal ini jaringan menghubungkan beberapa buah jaringan-jaringan kecil ke dalam lingkungan area yang lebih besar, sebagai contoh : jaringan pada suatu Bank dimana Bank tersebut mempunyai cabang di dalam sebuah kota besar dihubungkan antara satu dengan yang lainnya.

3. WAN (Wide Area Network)

WAN, jaringan ini sudah menggunakan sarana Satelit, sebagai contoh : Internet yang sudah mencakup seluruh dunia dimana kita bisa mencari apa saja yang kita perlukan. Internet mampu melakukan komunikasi mulai pertukaran data hingga komunikasi telepon.

nah udah taukan model-modelnya, itu hanya pengertiannya sebagian kecil aja.
semoga bermanfaat buat kita semua yang membacanya. A M I E N

B. Inggris Bisnis 1, Pertemuan 5

• Example of Press Release

NEW BOOK HELPS BEGINNERS WRITE THEIR WEB SITE RIGHT
For Immediate Release
Company: The Write Market
Contact: Terry Kent
Phone: 215-355-7472
Do you want to know how to make a Web site that will sell your products, services or help you brand your business?
“Create Web Content that Sells! main focus is to teach you how to write to sell on the web. It also shows you how to create a navigation strategy that will bolster your sales, how to recognize graphics that work, and how to write for search engine promotion. It’s an easy to read book that anyone, at any level, can understand. The book’s aim is to teach you our proven strategies and methods,” says Renee Kennedy, co-author of Create Web Content that Sells!
This book is especially geared to small business operators that need to quickly absorb how to market, brand, and write to sell on their web sites. A web site is a fantastic marketing tool, if you know how to use it. Create Web Content that Sells! will teach you how to use it.
Judy Vorfeld, web writing expert, owner of www.webgrammar.com and moderator of i-CRM discussion list had this to say about the authors and the book, “You two have the experience, the understanding of where newbies are coming from, and you have a delightful writing style. It’s a terrific tutorial!”
This book gives you a proven method to write content and choose graphics that sell. You will find the book sold in print and ebook format at: www.thewritemarket.com.
Full Contact Information:
Terry Kent
215-355-7472
The Write Market
RR1 Box 130M
Shenandoah Junction, West_Virginia 25442
Web URL: http://www.thewritemarket.com/
Photo Link: http://thewritemarket.com/media/us.htm

• Simple Past Tense

1. I was a student at that time.
2. She was a teacher in 1975.
3. I always went to mosque at night.
4. Clots used to be the only menas of transportation then.
5. You and I in Padang last saturday.
6. They went ti China last night.
7. He used to have five goats and two cows.
8. Ade worked for Trans TV for ten years.
9.This hotel was built in 1988.
10. Thomas A Edison inveted electricity.
11. Mr.Ibnu bought a new car two days ago.
12. Riri meet her old friend yesterday .
13. You were there yesterday.
14. He was in Japan last month.
15. I was busy last night.

B. Inggris Bisnis 1, Pertemuan 3

Name of insured…………..Thompson Trucks……….
Address ……………………… 18 The Mint Yard…………
…………………………………… St Stephen’s Gate………..
…………………………………… Westhampton……………..
Tel. No. ……………………….24246………………………….
Consignors…………………..Hotel Interiora PLC………
Address……………………….108 Hickstead Road……..
……………………………………Brampton…………………….
If theft or loss, which Police Station wa advised and when?
………………………………………………………………………….
If damaged, where are the damaged goods now?……………………………………………………………………………………………………………………………….
Are there other policies covering the consignment in question?
YES/NO
Gross amount of claim £…560…………………………..
Salvage value if any £………………………………………..
Net amount of claim £………………………………………
i/We declare the foregoing particulars to be true in every respect.
Signature……….Joe Clauck…………………………………
Position…….Transport Manager……………………….
Please complete the statement of claim overleaf. Please turn over.
Number of vehicle……….HJ 660Y……………………….
Make of vehicle…………..Leyland………………………..
Date of occurrence………Jan 14/15…………………….
Name of driver…………….Peter Ross…………………..
Age…………………………….25………………………………..
Length of service………….2 Years………………………..
Name of whitness……………………………………………..
Address………………………………………………………….……………………………………………………………………………
Date on which goods collected
…………………………………..14th January………………….
Date on which goods delivered
…………………………………..15th January………………….
Signature given on ccollection?
YES/NO
Name of signatory……….Peter Ross…………………..
Was receipt clear/claused?
Signature obtained on delivery
YES/NO
Name of signatory……….M Banks………………………
Clear/claused………………4 chairs short………………
Nature of load……………..Furniture…………………….
No. of items in load……..30……………………………….
Weight………………………………………………………………
Nature of goods lost/damage
……………………………………4 chairs………………………..
Amount of loss/damage £…560…………………………
Date……………….20th January………………………………
a. Hotel interiors PLC
b. Brampton Hospital
c. Damaged
d. 140
e. 560
f. 14th January
g. Yes, it was
h. About the missing 4 chairs was loss/damaged

B.Inggris Bisnis 1, Pertemuan 2

Active / Passive Overview



Active

Passive

Simple Present

Once a week, Tom cleans the house.

Once a week, the house is cleaned by Tom.

Present Continuous

Right now, Sarah is writing the letter.

Right now, the letter is being written by Sarah.

Simple Past

Sam repaired the car.

The car was repaired by Sam.

Past Continuous

The salesman was helping the customer when the thief came into the store.

The customer was being helped by the salesman when the thief came into the store.

Present Perfect

Many tourists have visited that castle.

That castle has been visited by many tourists.

Present Perfect Continuous

Recently, John has been doing the work.

Recently, the work has been being done by John.

Past Perfect

George had repaired many cars before he received his mechanic's license.

Many cars had been repaired by George before he received his mechanic's license.

Past Perfect Continuous

Chef Jones had been preparing the restaurant's fantastic dinners for two years before he moved to Paris.

The restaurant's fantastic dinners had been being prepared by Chef Jones for two years before he moved to Paris.

Simple Future
will

Someone will finish the work by 5:00 PM.

The work will be finished by 5:00 PM.

Simple Future
be going to

Sally is going to make a beautiful dinner tonight.

A beautiful dinner is going to be made by Sally tonight.

Future Continuous
will

At 8:00 PM tonight, John will be washing the dishes.

At 8:00 PM tonight, the dishes will be being washed by John.

Future Continuous
be going to

At 8:00 PM tonight, John is going to be washing the dishes.

At 8:00 PM tonight, the dishes are going to be being washed by John.

Future Perfect
will

They will have completed the project before the deadline.

The project will have been completed before the deadline.

Future Perfect
be going to

They are going to have completed the project before the deadline.

The project is going to have been completed before the deadline.

Future Perfect Continuous
will

The famous artist will have been painting the mural for over six months by the time it is finished.

The mural will have been being painted by the famous artist for over six months by the time it is finished.

Future Perfect Continuous
be going to

The famous artist is going to have been painting the mural for over six months by the time it is finished.

The mural is going to have been being painted by the famous artist for over six months by the time it is finished.

Used to

Jerry used to pay the bills.

The bills used to be paid by Jerry.

Would Always

My mother would always make the pies.

The pies would always be made by my mother.

Future in the Past
Would

I knew John would finish the work by 5:00 PM.

I knew the work would be finished by 5:00 PM.

Future in the Past
Was Going to

I thought Sally was going to make a beautiful dinner tonight.

I thought a beautiful dinner was going to be made by Sally tonight.



Sumber : http://www.englishpage.com/verbpage/activepassive.html

Bahasa Inggris Bisnis 1

1. Formal and Informal Language

Informal		Formal
1	Everybody must…	It is essential/crucial/vital that all parties…
2	In our daily lives we experience the influence of …	Daily life is influenced by…
3	We simply/just order goods from…	Goods can be ordered directly from…
4	Let us consider…	It is important to consider…
5	It’s high time we all did the right thing.	The current situation requires action from all citizens…
6	We can’t see and touch the goods.	Goods cannot be seen or touched…
7	When we download songs we cheat their authors of income.	Downloading songs infringes on the interests of their authors.
8	We, Chinese, do things our own way.	Chinese people tend to do things in a certain way.
9	I love/ I like/ prefer…	Personally, I favour…
10	We face a huge danger of being cheated…	There is a serious risk of fraud…
11	You may ask…	One may ask…
12	Students have their own styles of learning…	Students learn in different ways…
13	We can do many things…	Many things can be done/are possible…

2. Simple present tense

Simple Present Tense

How do we make the Simple Present Tense?

subject	+	auxiliary verb	+	main verb
		do		base

There are three important exceptions:

1. For positive sentences, we do not normally use the auxiliary.
2. For the 3rd person singular (he, she, it), we add s to the main verb or es to the auxiliary.
3. For the verb to be, we do not use an auxiliary, even for questions and negatives.

Look at these examples with the main verb like:

	subject	auxiliary verb		main verb
+	I, you, we, they			like	coffee.
	He, she, it			likes	coffee.
-	I, you, we, they	do	not	like	coffee.
	He, she, it	does	not	like	coffee.
?	Do	I, you, we, they		like	coffee?
	Does	he, she, it		like	coffee?

Look at these examples with the main verb be. Notice that there is no auxiliary:

	subject	main verb
+	I	am		French.
	You, we, they	are		French.
	He, she, it	is		French.
-	I	am	not	old.
	You, we, they	are	not	old.
	He, she, it	is	not	old.
?	Am	I		late?
	Are	you, we, they		late?
	Is	he, she, it		late?

How do we use the Simple Present Tense?

We use the simple present tense when:

• the action is general
• the action happens all the time, or habitually, in the past, present and future
• the action is not only happening now
• the statement is always true

John drives a taxi.
past	present	future
It is John’s job to drive a taxi. He does it every day. Past, present and future.

Look at these examples:

• I live in New York.
• The Moon goes round the Earth.
• John drives a taxi.
• He does not drive a bus.
• We do not work at night.
• Do you play football?

Note that with the verb to be, we can also use the simple present tense for situations that are not general. We can use the simple present tense to talk about now. Look at these examples of the verb “to be” in the simple present tense – some of them are general, some of them are now:

Am I right? Tara is not at home. You are happy.
past	present	future
The situation is now.

I am not fat. Why are you so beautiful? Ram is tall.
past	present	future
The situation is general. Past, present and future.