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Passive and Active Network Measurement: 9th International Conference, PAM 2008, Cleveland, OH, USA, April 29-30, 2008, Proceedings
Product Description
This book constitutes the refereed proceedings of the 9th International Conference on Passive and Active Measurement, PAM 2008, held in Cleveland, OH, USA, in April 2008. The 23 revised full papers presented were carefully reviewed and selected from 71 submissions. The papers focus on research and practical applications of network measurement and analysis techniques and are organized in topical sections on addressing and topology, applications, classification and s… More >>
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How to Become a Computer Network Administrator
about 2 months ago - No comments
So you want to learn how to become a network administrator. This could be your next step towards a challenging, fulfilling and rewarding career in the information technology field. The future looks bright for this career – in 2006 the Bureau of Labor Statistics estimated that the field of network administration will have grown by 18 percent by 2016, adding 155,000 new jobs. As a network administrator you can manage online functions, local area networks and wide area networks for businesses, government agencies and/or nonprofit organizations. But before anything else you will need to get some education and training.
Most network administrators enter this career after getting a bachelor’s degree in computer science, although there are other degree options. If you get an associate’s degree in computer science or a bachelor’s degree in a related field like math or engineering, but you have taken computer classes and earned the most sought-after certifications, you should still have a bright future in this industry.
Whatever educational path you take, it also really helps to complete an internship program while you’re in school. This way you’ll have some experience to boost your résumé, and you may even get a job at that company once the internship is over.
Once you have gotten your education and training out of the way, then you need to update that résumé to include all your experience and start applying for jobs. If you weren’t able to get hired at the company you interned at, try to see what kind of services your school’s career center offers. There are also online job boards geared toward network administrators and other tech jobs. You may also find some part time, temporary or freelance positions that are immediately available if you can’t find a full time job in this field right away.
It’s never been a better time to be a network administrator. The salary range for network administrators in the United States is ,520 to ,000 per year, according to the Bureau of Labor Statistics. With experience and merit there’s no reason why you can’t earn a salary in the top of that range.
Network and computer Security services by BEL Network Integration & Support
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In the field of Computer Networking support, the specializer area of network security consists of the plannings and policies adopted by the Computer network administrator and networking consultant to prevent and monitor without official authorization access, misuse, modification, or denial of the computer network and network-accessible resources.
Network installation service and security is the process of preventing and detecting unauthorized use of your computer. Prevention measures help you to stop unauthorized users (also known as “intruders”) from accessing any part of your computer system. Detection helps you to determine whether or not someone attempted to break into your system, if they were successful, and what they may have done.
The term network security refers to steps taken with the intention of protecting your computer and data network of threats from Trojan horses, worms, viruses, ad ware, hacker attacks, spyware, denial of service attacks, identity theft and theft by data interception.
In short, network support services measures are implemented to protect the computers in your office by ensuring their integrity, reliability, usability and safety of your computer network and data.
Effective network security targets a variety of threats and stops them from entering or spreading on your network.
Implementation of Network Security
To better understand its implementation, let us consider a hypothetical example. Let us assume a new Fort Knox was being setup and you were in charge of its security.
How would you go about ensuring the security of the vault and the bank in general?
You would probably want to start at the vault itself by building one of solid steel or titanium having three feet thickness or so. The thickness would make it impervious to drilling or even powerful blasts. Then you would probably install movement detectors, heat detectors and tremor sensors. For the vault door itself you would probably want to use the world’s best locking system controlled by two or more authorized personnel. Moving one layer ahead, you might consider it a good idea to have a posse of security guards to prevent all but only authorized personnel from approaching the vault and so on. In other words, you would rely on several measures implemented like layers of an onion. And that is also exactly how computer network and data security measures are implemented – there is no one particular software or hardware rather, it is several measures implemented at several levels.
All these measures need to be reviewed no less than once a year because hackers and malicious software creators quickly learn how to bypass your security measures by hard work, sheer ingenuity and lots of skill. Computer network even includes your peripheral and communication devices. Hackers are known to routinely hack into the telephone network, pretend to be an authorized employee and phone up the system administrator to request that the password to a certain computer or wifi router be reset. A few seconds is all it takes for the hacker to get into your computer system.
Network security services and measures include but are not limited to installation of up-to-date anti-virus and anti-spyware, anti-adware, properly configured state-of-the-art firewalls, intrusion prevention systems and virtual private networks (VPN’s), to ensure secure remote access.
Major Benefits of Network Security
A good network security ensures that your company meets the mandatory regulatory compliance because network security helps protect sensitive data and reduces the risk of legal action from affected parties due to data theft. Network Security also saves your company a lot of embarrassment by not getting bad media attention that follows any security breach, it also protects from unwanted (and usually expensive) disruptions. Ultimately, network security ensures the protection of your most important asset – your business reputation.
For more information, please call BEL Network Integration & Support, LLC (BELNIS) a network consulting services at (804) 796-2631. BELNIS has a 21-year track record for providing quality solutions to business establishments and government offices throughout Richmond & Tri-Cities area in the State of Virginia, USA.
Click Here For: Networking Support And Computer Network Services
The Network Time Protocol – Used in Computer Networks
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By description, this is a protocol designed for transfer of time around a computer network. It works through a hierarchy composed of several strata starting with Stratum 0 which provides the external source of time. Stratum 1 gets the accurate time from a hardware clock which can be got through GPS signals as they are the safest and most reliable. This is because of the many satellites that orbit the earth at any one time. The references are not limited to these as radio signals and broadcasts also provide a safe and relatively reliable source of time. The broadcasts vary with locations and are not as centralized as the GPS signals but they all provide related times, if not equal. Some common ones include MSF from the UK, JJY from Japan and WWVB from the USA.
Reliability being the main issue means that there is need for backup reference clocks in the unlikely event of a signal outage.
These references provide the time with the same precision as the signals and are able to maintain a holdover for extended periods until the signals are regained. These backups are expensive however and the reasons for getting them should be more than the reasons for foregoing them. If you decide you need them to maintain the time then there are crystal oscillators that come at a good price.
NTP client software is usually provided with most OS. Linux has GNU public licence NTP client while Windows has Windows Time service. The advantage of having NTV servers is that is to make sure that the time-stamped transactions are carried out in the specified order. They are the missing link between network time distribution and the global time scale and should be an integral part of any company or organization.
Network Forensics Or Computer Forensics
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The expansion in networking correlations, convolutions and commotions has been followed by an increase in the amount of transgressions perpetrated within the networks. This has compelled the venture and law enforcement to embark on highly focused and specialized enquiries. Forensic scrutiny is the systematic analysis of a crime scene that creates unusual hitches and complications in the imaginary world. The main issue for an examiner within a computer is making some logic out of delicate digital data structured in vague and convoluted manner within the extensively large digital framework of the network.
Network forensics or Computer Forensics is the arrest, footage, and scrutiny of network events in order to identify the origin of security attacks. It assists in discovering unlawful admittance to a computer system, and hunts for proof in case of such an event.
Network forensics is the skill to scrutinize, at a network level, events happening or that have already occurred across an IT system.
There Are Three Steps To Network Forensics:
Intrusion Detection
Logging is the most excellent means to trail a hacker is by recording and preserving vast records of motion on a network with the help of an intrusion detection system.
Correlating Intrusion Detection And Logging
The utmost objective of network forensics is to present satisfactory evidence to let the illicit executor to be effectively put on trial. The realistic implementation of Network Forensics could be in areas such as hacking, deception, scam, insurance companies, data theft—industrial spying, denigration, narcotics trafficking, credit card replicas, software piracy, electoral law, obscene publication, false swearing, massacre, sexual harassment, and prejudice.
The most challenging part whilst performing network forensics is the thorough quantity of data produced by the network, mostly covering gigabytes on a daily basis. It becomes very monotonous to seek for facts and sometimes becomes nearly impossible to discover one, especially if the event is exposed after a very long time. Fortunately, the broad range of potent software, counting products rationale-built for forensic analysis, makes it convenient and realistic to crack cases.
To know more about Decision Group Inc and their recent meet in Taipei with the visit of South African Officers on bringing such powerful digital Network Forensics Solution for lawful Interception please log on to www.edecision4u.com.
Home Computer Network With Powerline Ethernet Adapter
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Building a computer network in your large home with two storey building is more difficult compared with a home with only one floor building and is sometimes frustrating. Thick concrete building generally contributes signal attenuation and dead spots in wireless. Running network cable is a hard work. But Powerline Ethernet adapter helps you build the network easily.
Should you build a home computer network from the scratch which consist of first floor where your Cable / DSL internet connection starts and the second floor where you would like to Expand the network wirelessly, you should assess your requirements to meet your needs. On the first floor, how many computers you need, how you connect them – wired or wireless. On the second floor, this is important because you need to connect the first floor to the second floor where a thick concrete building will be an obstacle whether you run the network cable or wireless access.
In the first floor where your router gateway (with 4x Ethernet ports) is located connects two desktop computers which are close each other with the gateway router – a wired connection for each of the computer is easier.
You just need to run a network UTP cable from each of the desktop computer to the router Ethernet ports.
Now the challenge is how to connect several laptops with Wi-Fi enabled and other Ethernet based devices in the second floor to allow them connect and access the Internet? You have two options – you run a network cable from the first floor to the second floor, or you provide wireless access from the first floor to the second floor clients. To run a network cable from the first floor to the second floor you need an extra effort probably by drilling the hole or run the clutter of the wires that will just look untidy.
You can install a wireless access point in the first floor and allow client computers in the second floor connect wirelessly.
But with the thick concrete building between the first and the second floor the wireless signal strength received by client computers in the second floor would be considerably weak. Your wireless performance in the second floor would be unsatisfactory.
The easiest way for your home computer network with two floors like this is to install a Powerline Ethernet adapter in the first floor and another adapter in the second floor. With Powerline Ethernet adapter, you can create high-speed secure building wide network using the power outlets in a single circuit breaker. The TPL-401E2K Trendnet Powerline Ethernet adapter is a new high speed adapter delivering the speeds of up to 500Mbps (theoretical) via the power outlets.
In this case, you can install one TPL-401E2K in the first floor and connect to the Ethernet port of your router gateway. And then you can install other Powerline adapters in each of the available power outlets in home as necessary to meet your need. Install one adapter in the second floor where you would like to install the wireless access point.
What this TPL-401E2K Does
Trendnet TPL-401E2K Powerline Ethernet Adapter is a high speed adapter via power outlets delivering the speeds of up to 500Mbps (in ideal conditions). The adapter is equipped with one Gigabit Ethernet port which is ideal in delivering high speed applications such as streaming High Definition (HD) media and smooth gaming. You can deploy up to 16 adapters in a network. For security connection, the adapter supports advanced 128-bit AES data encryption.
One thing to remember in deploying the Powerline Ethernet adapters in a building is that the adapters must be in a single circuit breaker system. If there are two circuit breaker systems in your building, to cover the whole building network you need to make a link between the circuit breakers. You need to install one adapter in one circuit breaker and another adapter in the other circuit breaker and link them as a bridge.
Now you can successfully build your home computer network providing wired connection in the first floor and wireless access in the second floor using the TPL-401E2K Powerline Ethernet adapter as a bridge between the floors via power outlets eliminating the clutter of the wires.
By Ki Grinsing
Computer Network – Comprehensive View – Part 1
about 3 months ago - 1 comment
Wireless networks enable people to communicate, access to applications and information without wires. That means access to the freedom of movement and the ability to expand the applications in different areas of the building, or near the city anywhere in the world. People, for example, while in the house search in the Internet, they can search in quiet places away from the noise of children or the rioters in front of the television presence of the entire family. Wireless networks allow people to interact with e-mail or surf the Internet from anywhere they like.
Wireless networks exist around us for many years, in fact, is the early forms of radio communications by the use of Native American Leather Ox for radio contact by putting it on the fire and remove it in waves for sending smoke signals to the other over great distances. Also the use of light pulses carrying information between the ships by Morse code which still form important contacts.
kind of cellular telecommunications is common today for talks with some people across the world.
Introduction to concepts:
Wireless networks play a crucial role in people’s lives, whether at home or at work or in public areas. The objective is simple networks to provide wireless communication between users and information sources without the use of wires. It is necessary to address the basic concepts of wireless networks by understanding how to operate. This chapter provides a full definition of wireless networks and how users use them in a variety of applications.
wireless communications systems are for many but the characteristic feature of wireless networks, said it was investigating the communication between the computers, these devices include a Personal Digital Assistant (PDA) Personal Digital Assistant and laptops and PCs
Personal Computers (PCs), servers and printers.
The computer processor has memory and the appropriate means to achieve with a particular type of network.
The traditional cell devices can be placed within the definition of a computer but the latest Mobile devices and even audio headset began in the integration of the network switches and power transformers account. The most of the electronic equipment was for wireless communications networks.
The networks rely on the wire or cable Fiber optic, wireless networks, the movement of information between computers. Information takes the form of an email, and web pages and database records, and a video or voice. The mobility of wireless networks, in most cases, data such as emails and files, we have shown progress in the performance of wireless networks through the addition of visual communications support to enable Video and Voice+.
The wireless network uses radio waves or light red medium of communication between users, and between servers and databases. This type of communication is no longer visible to the human eye, in addition to the real center of air visible to the user. Most manufacturers today make an integration between (NIC) Network Interface Card (NIC also reflects the HT) and the antenna in the computer. the NIC network card couldn’t seen by the user. It makes the computer the wireless mobile and easy to use.
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Computer Network – Comprehensive View – Part 2
about 3 months ago - No comments
Wireless networks located in multiple categories, depending on the size of the physical area that can be covered by network.
The following types of wireless network meet the needs of multiple users:
* Wireless personal – Area network (PAN).
* Wireless Local Area network (LAN).
* Wireless Metropolitan-Area network (MAN).
* Wireless Wide – Area network (MAN).
This is using the expansion all major cables for wired networks (such as LAN or WAN) used for years before it enters the wireless network.
Each type of wireless network has the advantages of complementary meet multiple requirements. The following paragraphs explore each type of wireless networks in a concise manner.
Wireless networks (PANS):
The area of wireless networks is a relatively short (up to 50 feet) and most of their effectiveness to meet the needs of a small room or in the cargo area.
PANS networks is the performance of the average of data rate of up to (2MBPS). Imperatives followed these advantages for the replacement of cables in many cases.
PAN wireless network includes a person synchronize personal PDA with his laptop computer or personal computer. In a similar, PAN wireless network can provide radio communication to the printer. The advantage of the abolition of knots in the wire when using this type of computer is very useful, where the initial installation of the equipment is easy.
Wireless networks (LANS):
Networks wireless LANs provide high performance within and around office buildings and labs, and homes often have the users in these areas laptop computers, personal computers, PDA screens and processors to support large applications.
LANS meet the requirements of communication for these types of computers effectively.
For example, in the work it can be installed the wireless LAN network to provide mobile access to the common applications of laptops. This type of system, the user can, while far from his office, take advantage of network services from the conference rooms and other rooms. That allows staff to be more effective while working away from their offices and more cooperative with each other.
Wireless networks LANS provide the performance levels enable applications to operate smoothly. For example, the wireless network LAN users can easily see e-mail attachments or a large scale video server of the invisible with data rate up to (54 MBPS). Wireless LAN network can meet only networks with the limits of web applications a house or office.
Wireless networks (MAN’S):
MAN’S wireless network includes areas with the size of cities.
Wireless Service Providers (WISPs) Provide wireless networks in cities and remote areas in order to provide homes and firms for wireless communications. Wireless networkings MAN provides the positive benefits and are appropriate when it is impractical to install a traditional wired communications such as (DSL and cable modem). Wireless networks WANS are effective when the right path for the cable systems have made it not possible or too expensive.
Wireless networks (WAN’S):
MAN networks known as mobile wireless applications cover a large area, such as state or continent. Because of the economic side, the operator is able to do remote deployment of the operational infrastructure of the wireless network MAN in order to provide relatively inexpensive long-distance communication for a lot of consumers. It is possible to distribute the costs of such a deployment across multiple users. It provides low fees -subscription.
Career Opportunities As A Computer Network Technician
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A career in computer based technology is not only about software engineers and analysts, but there are ample of other field branches which provide excellent employment opportunities. One such technological aspect is the field of computer network technology.
A computer network technician needs to provide technical, maintenance and support towards system support services. He or she is also required to perform repair of systems as well. In addition a major part of their duty involves troubleshooting the concerned system support services.
As the field of computer network is vast, there are many other facets related to the responsibilities of a computer network technician. He may be required to update the antivirus functionality for all the computers in the network. These technicians normally work in groups and report to a manager in computer networking company.
Some other aspects of the roles and responsibilities section for a computer network technician are as follows:
Apart from repairing and troubleshooting, they need to maintain a report history for future updates.
They need to be updated with the latest developments in the field of computer networking and integrate new solutions in their working.
Maintenance related issues are normally taken care of during non-peak hours or during weekends, so computer network technicians might have to provide their services during these hours.
Prerequisite
Prior to going for certifications and diplomas, knowledge and proficiency in computer hardware will help. A good customer service skill along with an understanding of software programs comes handy.
Educational Aspects
A diploma in information technology after high school can help you become a computer network technician. People who have completed graduation in other fields can also opt for the necessary certifications towards being a computer network technician. Later, they can apply for apprenticeship in network companies to get experience.
In addition, these technicians can complete certification courses and programs related to advance learning. Some common certifications include A+ certification, CompTIA A+, Network+ (HTI+) etc. With a rise in IT companies, there are excellent working opportunities for network technicians.
Career Growth
A computer network technician can move on to become a manager or a head of network when quality experience gets added to the resume. Project+ will help in a technicians growth towards better career prospects, like moving as a project manager.
A computer network technician gets a decent 10 to 18 dollars per hour, plus additional benefits while working during weekends and on holidays. In addition, many computer network technicians offer independent services thereby making extra income as well.
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Computer Network Advances Your Business Growth
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The advent of computers these days contribute to the growth of many business companies. It makes transactions and communication with people easier for entrepreneurs, employees and clients. With the growth of the internet, business opportunities gradually expand. However, computers do not only give many opportunities for businesses. It also gave birth to the advancement of technological devices.
Routers are one of the most commonly used devices today. It is a device that facilitates connection between two or more wireless computer networks. It receives and passes information from one computer to another by deciphering IP (Internet Protocol) addresses. It is vital in establishing a wireless internet connection within a certain place. However, in certain cases, routers are used for security purposes by employing a firewall.
Routers are usually used in establishing computer networks for many residential and commercial establishments. Often, computer-based companies use a router in creating a network within their workplace. This enables easy and faster communication. A computer network also gives people the convenience of file sharing and large storage capacity.
Computer networks are also cost-efficient compared to other software sold in the market. Software made available through computer networks can be accessed through a certain server and there is no need to buy many software copies for different workstations. Moreover, maintaining a computer network is easy. In houston computer network support companies are helping out many businesses start up their own computer network.
A secured computer network needs top-notch infrastructure and devices to cope up with the increasing number of data theft. Houston network support companies provide excellent security facilities to deny unauthorized access in confidential files stored in servers. They address different security issues by implementing excellent firewall and security systems on all your workstations.
Entrepreneurs do not need to worry about certain technological advancements that would only take advantage of their business. Computer network does not only give business companies the convenience of fast communication and easy accessibility. It also increases the production of the employees as they are provided with technology that can make their work easier. Like many companies in houston network support and technical assistance should always be observed when building a computer network for your business.
Printing Problem Using Network Computers
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If this is the first time you encountered this issue to a network printer, you have to try these troubleshooting steps:
Make sure you are connected to the network. You can check the status of your network by going to the Network and Sharing Center. Click the Start Button, Control Panel, Network and Internet, Network and Sharing Center. The network details provided in this window is helpful if you have connection problems.
Make sure that the printer is turned on and that all the cables are secure. Check the printer if there’s any button you need to push to change the printer status to online.
Check how the printer was set up. If it is plugged in to another computer and shared on the network, that computer has to be turned on and must also be connected to the network. If the printer was set up using a TCP/IP address, make sure your computer and the computer where the printer is plugged into is connected to the Internet and to the network.
Check if there was a power outage prior to the problem for it can change the TCP/IP address.
Inability to print to a network printer can be a compatibility issue. If you just installed a new version of your Windows or set the printer up for the first time, you might need to install a printer driver that is compatible to the operating system that your computer is running. If the printer that you are using is plugged in to a different computer and shared on the network, the other computer must have a driver installed for your version of operating system.
You can check the version of your operating system by clicking the Start button, All Programs, Accessories, System Tools, System Information and then System Summary.
From this window, you can check the name of your operating system (Windows XP, Windows Vista or Windows 7) and system type so you can choose which printer driver is compatible for you.
From here, you can install the printer driver by using the Windows Update option or the drivers might be saved to the hardware installation process in your computer, ready for install. You might need the installation CD that was provided when you first purchased your printer. If this is not available, you can always go to the printer manufacturer’s website to check if the printer driver you are looking for is available for download.
I hope the above-mentioned tips helped you. Have fun troubleshooting!
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