Direct Memory Access

Fitur pada komputer yang mengadopsi sifat suka menolong🙂 membantu “memperingan “kerja processor .

Kerja DMA terkait dengan : DMA controller, Processor,  Memory, I/ODevice

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Teknologi itu netral

Teknologi ada karena hasil pemikiran manusia.

Teknologi bukanlah benda hidup, sehingga penggunaannya dapat sepenuhnya dikendalikan oleh manusia.

Jadi, kenapa teknologi yang disalahkan jika terjadi kerusakan ditengah-tengah kehidupan kita ?

Kenapa teknologi yang dikambing-hitamkan jika manusia menjadi kurang produktif  ? Padahal tujuan awalnya adalah untuk membantu kehidupan manusia.

Salahkan orang yang memanfaatkan teknologi tersebut !

Salahkan perilaku negatif mereka dalam menggunakan teknologi !

ooOOoo

100 % it’s my perspective about technology

Network Mapper (NMAP)

NMAP

NMAP

What is NMAP ?

Network Mapper is a utility for network exploration or security auditing. (don’t worry .. it’s free and open source 🙂 ) . NMAP features include :

  • Security scanner for network exploration & hacking
  • It used to discover computers and services on a computer network
  • examples :> port scanning (enumerating the open ports), host discovery (identifying computers on a network, operating system detection (determining the operating system and some hardware characteristic of network devices)

How does NMAP work ?

NMAP runs in all major computer operating systems (console or graphical versions). NMAP uses raw IP Packets to determine what host are available on the network, what services (application name and version) those host offering, what operating systems they are running.

For experiment, I used NMAP to scan my own computer. Very simple … just type : nmap -O localhost (but ..first, make sure that NMAP has installed in your computer) and the result …..

Port scanning in my own computer

Port scanning in my own computer

There are three services that opened : HTTP, IPP MySQL and also information about Operating system that used (Linux 2.6) .

NMAP Graphical version ( experiment : port scanning against another computer)

NMAP-gui

detail

detail

NMAP useful for a network administrator , doing tasks such as monitoring host or service uptime, network inventory, and managing service upgrade schedule . So, NMAP – what a useful utility 🙂

References :

1. http://nmap.org/

2. http://en.wikipedia.org/wiki/Nmap