La sécurité est une chose yu ont le plus besoin. Vous pouvez utiliser la video surveillance pour protéger vos actifs, tout en travaillant pour des régions éloignées. Vous pouvez réduire vos risques par l’enregistrement de votre région et le regarder sur votre temps libre.
Archive for the ‘Hardware’ category
vidéo à distance
June 26th, 2010
Printing Press And Internet
May 22nd, 2010The revolution of the printing press and the internet definitely led to a robust revolution and a paradigm shift in access and distribution of information. Unlike in the past days where information was restricted to those who could read and write (scribes), information spread widely and ultimately increasing the literary levels. It also led to a revolution in religion since printing of religious books e.g. the Bible became faster.
Similarly, the internet equipped with electronic mails and search engines has resulted in increased information availability. This has caused an impact of change in businesses, research and academics as well as in our daily lives.
Despite the two revolutions having almost similar attributes, there are some differences between them. The internet or the electronic media is more versatile than the print media. It can perform tasks such as editing, formatting, deleting and customizing the document. The internet allows for consolidation of bulky information in one place through information databases. This has led to reduced bulkiness of paperwork. Additionally the spread of information is faster via internet than through printed material.
Arguilar (2009) remarks that with the current rate of technological improvement and development, it is likely that printed books may become obsolete. There has been a shift in handling information from hardcopies (prints) to softcopies.
The revolution of the printing press and the internet has some negative and positive implications as relate to literacy and knowledge.
The printing press invention led to increased knowledge due to accessibility of learning material thus improving the literacy levels. Similarly the internet led to the same but over-reliance on it has led to a behavioral change in learning. Issues of Plagiarism have increased with the internet since most materials accessible through the net do not cite authorship, source or authority. This has generally undermined the traditional research criteria and procedures.
Personally the internet is advantageous for it has improved communication, search and access of information. It has also reduced the time normally used in olden procedures in the same. Additionally, it is relatively cheap as compared to the print media.
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Votre guide de référence pour la surveillance vidéo
May 15th, 2010Choisir une forme de surveillance vidéo nécessite beaucoup de réflexion et une familiarité avec les types de caméras de sécurité et les systèmes de télévision en circuit fermé là-bas. Mais il ya tellement d’informations là-bas. Vous n’avez probablement pas le temps ou la patience de passer au crible tous les sites Web dehors là. Qu’est-ce vous avez besoin est un guide complet à la videosurveillance , qui explique caméras de surveillance et systèmes de caméras de vidéosurveillance à vos besoins à l’esprit.
Beginners Guide – Secure Network
October 9th, 2009
- Image via Wikipedia
Secure network is vitally important for most network systems. Whilst email viruses and denial-of-service attacks (DoS attack) may cause us headaches on our home systems, for businesses, these sorts of attacks can cripple a network for days – costing businesses hundreds of millions each year in lost revenue. Not to mention corporate legitimate to clients.
Creating secure network to prevent this type of malicious attack is usually of paramount importance for network administrators, and while most invest heavily in some forms of security measures there is often vulnerabilities inadvertently left exposed. As we always heard that security is as secure as the weakest link.
Firewalls are the best place to begin when you are trying to develop a secure network. A firewall can be implemented in either hardware or software, or most commonly a combination of both. Firewalls are used to prevent unauthorized users from accessing private networks connected to the Internet, especially local intranets. All traffic entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified criteria. If the packet do not meet security criteria then the system will not allowed those packets entering network system.
Anti-virus software works in two ways. Firstly it acts similarly to a firewall by blocking anything that is identified in its database as possibly malicious (viruses, Trojans, spyware etc). Secondly Anti-virus software is used to detect, and remove existing malware on a network systems or workstation.
One of the most over-looked aspects of secure network is time synchronization. Network administrators either fail to realise the importance of synchronization between all devices on a network or the system simply don’t work. Failing to synchronize a network is often a common security issue. Not only can malicious users take advantage of computers running at different times but if a network is struck by an attack, identifying and rectifying the problem can be near impossible if every device is running on a different time.
Even when a network administrator is aware of the importance of time synchronization they often make a common security mistake when attempting to synchronize their network. Instead of investing in a dedicated time server that receives a secure source of UTC (Coordinated Universal Time) externally from their network using atomic clock sources like GPS, some network administrators opt to use a shortcut and use a source of Internet time.
There are two major security issues in using the Internet as a time server. Firstly, to allow the time code through the network a UDP port (123) has to be left open in the firewall. This can be taken advantage of by malicious users who can use this open port as an entrance to the network system. Secondly, the inbuilt security measure used by the time protocol NTP, known as authentication, doesn’t work across the Internet which means that NTP has no guarantee the time signal is coming from where it is supposed to.
To ensure that you have a secure network, isn’t it time you invested in an external dedicated NTP time server?
Priyo Wibowo | MCP
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Secure Wireless Network
October 5th, 2009
- Image via Wikipedia
Having the ability to go wireless in your home or at the office is a great feature to have. Not only is it the freedom to be mobile, but also leaving your house wired free, and not having to route cables through drilled walls, shows another area where wireless is too good to miss out on. The freedom to roam your house from room to room, or even sit under the palm tree of your garden on a hot sunny day, proves there’s no going back from wireless network. However, because of the nature of the technology, wireless has a number of security issues we must be aware of And you will learn how to secure wireless network.
A neighbour, hacker or someone just by your home can easily detect your wireless network signals and attempt to connect to your wireless access point. This is because wireless network systems uses radio frequency and data travels through the air, though they do not need physical access to your router. This is where the security concern comes from.
So let’s get to the point. How bad could it be not secure wireless network?
The common stressing points we hear everyday regarding wireless security is the ability that an evil doer can easily sniff data, coming and going to your wireless access point. Also they will have the ability to use your router to browse the web just as you do… using your bandwidth.
It doesn’t really sound that bad… Does it?
Well how about if your neighbours or anyone on the street outside your home were using your wireless access point and taking part in illegal downloads, visiting illegal websites and generally using the web for criminal activity. Who do you think would get the blame? When you have the FBI busting through your door, and you’re quick to think your children are not as innocent as they claim to be, it may be a mountain for you to climb out of at this point.
The illegal downloads and criminal activity that was occurring from the next house on, was all under your ID. They were using your access point which from the ISP point of view was coming from your home. This is what happened when you are not securing your wireless network.
To add to this, in a couple of months time when your bank statement arrives through the door showing you spent £3000 on a new TV, as well as purchasing a set of Golf clubs, it may just all be too late by then. A hacker could have easily sat outside your home and sniffed your bank details or any other confidential details you may have used when online, all from the comfort of their car or home. All they need is a wireless laptop to do this, and sit within a range of your wireless network router, in other words somewhere outside your house!
Now this also goes for businesses with wireless access points as well and not just for home users. In fact it is so much more crucial for businesses because a hacker can break into their network via the access point, hacking into company confidential data!
Therefore secure wireless network today is crucial for all the reasons above. Identity theft today is on the rise, and hackers will go the distance looking for insecure wireless access points. For this reason you should take the time and ensure you have a secure wireless network.
Priyo Wibowo | MCP
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Wireless Network Routers
October 4th, 2009
- Image via Wikipedia
Wireless networks have become very popular in these days market with the continuing increase in technology. A major concern with wireless networks is in fact to secure wireless network. Securing wireless networks has become more and more important with the increase in the number of users of wireless networks. It is now simple for the average individual to set up a wireless network system at home or at the office. These network systems may be within the range of many other potential network intruders with the technology to detect and access the systems.
There are several things you can do towards securing wireless networks. It is common however for many to leave out these steps and just start using the network system. The little time it takes to use these security features is time well spent and can be considered to be great preventative measures in protecting your system. The trouble can be encountered if your network system is not secure can lead to much more expensive and time wastage. e.g data leakage, virus, trojan etc.
One of the first steps in securing wireless networks is the changing of the administrative password for the router. This is important as most default passwords are common standards such as password and can be easily broken into. This password protects your router from unauthorized access and can prevent the unauthorized changing of your settings. The next tip for securing your wireless network is not to broadcast the name of your network systems. The majority of wireless network routers do this and this makes life easier for clients as they can locate the network without having to know the name but this is also an easy way for intruders to detect your network. It is therefore advisable to turn off the service set identifier for your system. And you can limited users accessing your network by registering their devices so you can control who is accessing your network systems.
There are normally two encryption types for the wireless network systems. These are WEP and WPA encryptions. The WEP encryption is not as strong as the WPA system and this means that the WPA is the better choice. This system provides protection that is easier to use and that is harder to crack than the WEP system. The WPA system is now found built in to many operating systems and all modems for wireless systems. This is a great step towards securing wireless networks.
Another action towards securing wireless networks is the reduction of the wireless network routers transmitter power. This has the overall effect of a reduction in the power and range of your signal. It is very difficult to adjust the signal precisely so there is no leakage outside of the required range but with trial and error it is possible to determine approximately how far the signal is leaking and to make adjustments accordingly. This greatly minimizes the opportunity for outsiders to intrude on your network. The disabling of remote administration is also another action that can be taken towards the security of the network.
So, when you setup a wireless network routers, keep in mind who gonna access your wireless network, how to secure your wireless network and don’t forget to change the password, setup encryption and registering who can access your wireless network router.
Priyo Wibowo | MCP
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The Broad Categories of Computer Network systems
October 3rd, 2009Talking about computer network systems could give a heart attack to such people. However, it is not as scary as it may sound. For some people, the computer itself could be a scary topic, considering the fact around how complicated the machine is.
Computer network systems could be understood by separating the two words in the term. A “computer” as we know is a complex machine that helps us to process information. “Network” refers to linking or connecting. Hence computer network would simply mean getting two or more computers connected. When we say the word “connected” in this reference, we mean that one computer could be accessed through the other. This connection can be done by using wire or wireless devices e.g wireless network.
Broadly speaking there are two ways of connecting two or more computers. The first one is called the wired network and the other one is called the wireless network. Both of these are huge subjects to study and understand. However, in layman’s language it could be said that when two or more computers are connected through wires it’s called the wired network. And when they are connected without the wires through wireless router, it is known as wireless network. As the wired networks are limited to the area wherein the wire web is installed, similarly the wireless has range limitations. For wireless network we should consider how many devices will access the network. The number of machines that are on a network would ensure the speed of the network. More machines in a network would mean a slow network.
The various computer network systems could be – Personal Area Network; Local Area Network; Campus Area Network; Metropolitan Area Network; Wide Area Network; Global Network and most importantly internet, intranet or the extranet. The names are given to the network depending upon the arena they have. Like for example the campus area would mean the machines that are in a given physically limited campus are connected through the computer networking. This could be wired or wireless networking.
Internet could be understood as a global network systems. Since Internet connected many network system all over the world. By using network system we can connected to other people in the other side of the planet.
Priyo Wibowo | Asido Jaya
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Cisco Router
September 30th, 2009
- Image via Wikipedia
Promo Cisco Router Aug 09 – Oct 09
Bagi perusahaan yang sedang berkembang, kebutuhan akan jaringan sangat penting untuk mendukung kemajuan bisnis, begitupun dengan Anda. Network system yang handal memerlukan perangkat jaringan yang handal pula seperti Router dan switch. Cisco yang terpercaya dan berpengalaman, memiliki router andal yang sesuai untuk kebutuhan bisnis Anda.
Asido Jaya dengan pengalaman membangun network infrastruktur di berbagai perusahaan besar dan kecil dapat memberikan solusi yang terbaik bagi perusahaan Anda. Dengan berbekal pengalaman kami dapat memberikan saran yg baik bagi perusahaan Anda, dimana Anda dapat menikmati jaringan komputer yang canggih yang mengerti bisnis Anda dan sesuai dengan budget yang Anda miliki. Dapatkan berbagai keunggulan dari router Cisco, diantaranya:
· Memberikan keamanan dan kecepatan yang optimal dalam pengiriman data, suara maupun video.
· Memudahkan perusahaan antar cabang terhubung dengan jaringan.
· Keamanan hingga 800 VPN dengan modul AIM.
· Anti virus didukung oleh Network Admission Control (NAC).
· Memiliki dua 10/100 Fast Ethernet Ports.
· Compatible dengan 90 Modules.
· Memiliki slot untuk WIC, VWIC, dan VIC.
Dapatkan keuntungan dari penawaran khusus router Cisco sekarang juga yang akan mendukung kemajuan bisnis
Anda:
Cisco 1841 = US$ 1,395 >> US$ 935
Cisco 2801 = US$ 1,995 >> US$ 1,335
Cisco 2811 = US$ 2,495 >> US$ 1,670
Contact:
Priyo Wibowo | CCDA
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- Cisco unveils Cius, its video conferencing and work-focused … – You can reach him at devindra@venturebeat.com, and on Twitter at @Devindra. varianted. The Cisco router will have a Console port on it somewhere. Along with the router you would also have received something called a ‘roll-over’ cable. …
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Promo Catalyst 2960
September 30th, 2009
| Penawaran Cisco Switch Terbaik untuk kemajuan bisnis pelanggan Anda
Bagi perusahaan yang sedang berkembang seperti Bisnis Anda, dibutuhkan dukungan jaringan yang kuat dan andal. Kini Anda dapat menikmati kekuatan jaringan yang banyak di pakai oleh perusahaan besar dalam menjalankan bisnis mereka. Kini dengan penawaran khusus selama Agustus 09 sampai dengan October 09, penawaran khusus bagi Anda yang ingin mengembangkan bisnis ke tingkat yang lebih baik lagi. Pastikan perangkat jaringan ini terpasang di infrastruktur jaringan Anda. |
Pastikan bisnis Anda semakin maju dengan fitur Cisco Catalyst 2960 Series Switches:
· All-in-one komunikasi: menggabungkan data, nirkabel dan dukungan suara dalam satu jaringan sekaligus.
· Pilihan Fast Ethernet (100 megabits data per detik) atau Gigabit Ethernet (1000 megabits data per detik).
· Beberapa model konfigurasi yang mampu menghubungkan desktop, server, telepon IP,
poin akses nirkabel, atau perangkat jaringan lainnya.
· Sistem keamanan yang terintegrasi.
· Kemampuan mengatasi masalah konektifitas.
Promo Cisco Catalyst 2960 Series Switches august 2009- october 2009:
WS-C2960-24TT-L
24 Ethernet 10/100 ports and 2 fixed Ethernet 10/100/1000 uplink ports
US$ 1,295 Promo US$ 840
WS-C2960-24TC-L
24 Ethernet 10/100 ports and
2 dual-purpose uplink ports
US$ 2495 Promo US$ 1,620
WS-C2960G-24TC-L
24 Ethernet 10/100/1000 ports, 4 of which are dual-purpose
US$ 3,295 Promo US$ 2,140
WS-C2960-48TT-L
48 Ethernet 10/100 ports and 2 fixed Ethernet 10/100/1000 uplink ports
US$ 2,495 Promo US$ 1,620
Priyo Wibowo | CCDA
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How to Wireless Network
September 28th, 2009
- Image via Wikipedia
How to wireless network is something I need to share for all of you. In these days, many people working on the move, wether they are marketing, sales or business owner. for those mobile users wireless device is the only option device they have to do their jobs while away from the office. Sometimes these professional bring their work at home too, so they need network systems of their own.For those who’s not familiar with IT think setup a network installation could be a daunting task as they don’t know where to start and what todo. So for people who don’t know anything about technology could start from making some checklist about their needs. First list all you need from network systems, such as printer sharing, file sharing, gamings for kids and even internet sharing. After your list complete look again to see what is important to your goals. Then you need to create another list of peripheral that you need to connect it to your wireless network.
Now based on the list you make we can look what kind of peripheral you have that compatibel with your network design. From here you can measure how much money you need to spend on building your wireless network. After you create your budget then you may look some brands that suits your needs and off course you need to consider about compatibiliy issue for your hardware since you need to grow your wireless network as you update your devices.
For wireless network installation you can follow instruction on manual that comes with your hardware just look on how to. Wireless network is the simplest network systems to set up by your own. But if you feel confused and need some advice, contacting a network installer professional is your only option as these professionals has the ability to run network installation and also can advice you to choose the best network you need within your budget.
Priyo Wibowo | MCP, MCSA, MCTS, MCT, CCDA
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