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Telnet

Telnet atau Terminal Emulation adalah program yang memungkinkan anda untuk mengetikkan perintah seakan-akan anda berada pada mesin tersebut. Telnet menjadi tools yang banyak digunakan oleh hacker karena hampir semua OS mempunyai tools ini dan penggunaannya yang sangat sederhana.
Karena telnet mensimulasikan terminal, maka perintah-perintah yang anda lakukan akan menggunakan resource dari server secara penuh dan bukan resource dari computer client.
Telnet server digunakan oleh telnet client untuk mengeksekusi perintah dan bisa di install pada WinNT, Win2000, Linux, Unix, dll. Syntak penggunaan Telnet adalah :
C:\>Telnet target port

Nslookup
Nslookup adalah tools yang dibuat untuk berinteraksi dengan DNS yang bisa digunakan dengan 2 mode, yaitu interactive dan command mode. Contoh penggunaan NSLookup pada command mode :
Nslookup host

Tracert
Tracert adalah utility yang digunakan untuk mengetahui tempat-tempat yang dilalui oleh suatu paket mencapai tujuannya. Dengan tracert anda bisa mengetahui lokasi-lokasi yang dilalui oleh suatu paket dan meneliti kecepatan serta masalah yang terjadi selama paket dalam perjalanan.
Tracert tujuan

Netstat
Netstat adalah utility untuk mengetahui statistic dari protocol dan current state dari koneksi TCP/IP.

Nbstat
Nbstat adalah utility untuk mengecek koneksi Netbios over TCP/IP, update chace LMHOSTS dan scope ID.

SNMP
SNMP atau Simple Network Management Protokol adalah protocol yang digunakan untuk memonitor status komunikasi antara bermacam-macam host yang menggunakan protocol TCP/IP. Contoh yang bisa dimonitor oleh SNMP ini adalah :
*Komputer NT/W2K
*LAN Manager Server
*Router
*Gateways
*Mini Computer
*Mainframe
*Terminal Server
*Hubs
*DLL

Since the first computer was made in the late fifties, the technology has developed extremely. Computers which took the place of a living-room then are now being made not much bigger than credit cards! More and more areas are being taken over by the computer. The world is being computerized!

As computers are capable of handling large amounts of data ina very short time, they are well-suited for word processing. It won’t be long before all paper archives are replaced by magnetic tapes and CD-ROMs. Even a 1.44 megabytes (MB) diskette can hold hundreds of times more information than a written page. And it takes up less space, too!

In the near future, maps and road directories will be replaced by CD-ROMs. A single CD is sufficient to store all the information on the different routes within a state or even a country; not to mention much more information and tips to short-cuts from one point to another. In fact, some would-be prophets of the computing world have firmly declared that drivers in the future would only have to insert the CD-ROM that contains the route map into the car’s computer and the car will automatically drive him to his destination!

Virtual reality is also currently being tested in a big way. Although still in its infancy, virtual reality research has made great headway. With sophisticated electronic gadgetry, virtual reality machines can make an experience frightfully real. Using a powerful computer and microsensors, a person can simulate reality and experience flying a jet fighter, swimming beneath the ocean among fish or any other experiences the system has been programmed to simulate. The National Aeronautics and Space Administration (NASA) of the United States have used this technology successfully to train its astronauts.

Now, let us a take a look closer to home. The urban children of today know not the simple joys of flying kites or shooting marbles. They get their fun out of computer and video games! In a way, it is a great advantage that children are being exposed to computers at an early age because they will definitely have to use them later as almost all schools now use computers and interactive teaching aids in teaching some difficult lessons.

Today, more than half of all the homes have a personal computer. People use the computer for personal budgeting, to calculate taxes, to surf the web or just to write a simple letter. Some home owners also have a dial-up connection with their workstations at work. Computer networking has made it possible to send and receive from one remote system to another. Therefore, these people can log on to their computers at work from their own homes if the need arises.

In conclusion, with all the rapid advancements in computer technology, it is quite safe to say that in the future there will be few occupations which do not employ computers in one way or another.