Cyber Technology

  There are several ways to hook up individual computers into a network. One is to use hardware routers to link up the network segments. If you buy hardware bridges, those will also connect the computers with each other. In Windows XP, simply clicking the "Bridge Connections" icon joins parts of a network together, even if the parts use different media to link their segments. Advantages Using a router or a hardware bridge requires buying more equipment to connect your computers. With a wireless router, each computer and network segment needs its own Internet Protocol (IP) address in order to direct data to the right computer. Both methods may require an IT professional or experienced amateur to connect everything properly. With Windows XP, building a bridging connection requires just a few clicks of your mouse in the right places. Bridging To make a bridge, you must log in as an administrator on your network or your computer. Click the computer's "Control Panel,"

  Virtually every business today requires at least minimal investment in technology and infrastructure to work with strategic business information and enable operations that depend on it. Today everything in business is or tends to be integrated and demands connectivity and web services. Therefore, it is important to invest in good internet systems in order to enable and manage this entire operation more effectively. But what are they for? Discover the importance of internet business systems and see why it is worth being a qualified professional in the field. 1- Internet systems encompass a number of factors essential to the functioning of the business IT environment. The Internet, as a conglomerate of globally connected communications networks and devices, allows information to come and go with ease. Internet systems can more easily organize this data stream, allowing access to information correctly and securely. In addition, a professional in this area contributes to the creation of

  To remotely boot a computer on a network, you'll need a "Wake-On-LAN" supported network adapter. Once the adapter is installed, the computer can be "pinged" from another computer on the network to initiate the boot sequence. A ping is a signal sent from one computer to another and can be sent directly from the Command Prompt in Windows. Step 1 Open the "Start" menu on the computer that will be pinged, then type "CMD" into the Search box and press "Enter." Step 2 Type "ipconfig/all" then press "Enter." Make note of the following items: Physical address, IP address and subnet mask. Step 3 Open the Command Prompt on the computer from which you will be sending the wake-on-LAN command. Type "ping" followed by the computer that you will be sending the wake-on-LAN command's IP address. For example, if the IP address is "192.168.1.1," type "ping 192.168.1.1" and press the "Enter&q

  Technology continues to change and improve, evolving faster and faster as it advances. Along with it, careers in the information technology industry also continue to grow. As a network engineer, you will be in the heart of the technological realm. You will have a wide range of duties that include designing, building, and maintaining computer networks for the organization you work for. These networks also vary widely – from a simple system that you can handle alone to a complicated system of LANs, WANs, intranets, and extranets that it takes a whole IT team to manage. There are a variety of fantastic reasons to become a network engineer including great pay, reputable companies to work for, and working with some of the most advanced technology available. While being a network engineer can be demanding work, you’ll find that the work is satisfying and that the benefits far outweigh any drawbacks. Responsibilities of a Network Engineer Network engineers are responsible for an organizatio

  There are several ways to hook up individual computers into a network. One is to use hardware routers to link up the network segments. If you buy hardware bridges, those will also connect the computers with each other. In Windows XP, simply clicking the "Bridge Connections" icon joins parts of a network together, even if the parts use different media to link their segments. Advantages Using a router or a hardware bridge requires buying more equipment to connect your computers. With a wireless router, each computer and network segment needs its own Internet Protocol (IP) address in order to direct data to the right computer. Both methods may require an IT professional or experienced amateur to connect everything properly. With Windows XP, building a bridging connection requires just a few clicks of your mouse in the right places. Bridging To make a bridge, you must log in as an administrator on your network or your computer. Click the computer's "Control Panel,"

By default, Windows NT, 2000, and XP locally store legacy LAN Manager (LM) password hashes (LANMAN hashes). LM uses a weak encryption scheme to store passwords, and hackers can usually crack it in a very short period of time. Windows stores LM hashes in the Security Account Manager (SAM) database. By default, clients have LAN Manager authentication enabled, and servers accept this authentication. This allows workstations to send weak LM hashes across the network, making Windows authentication vulnerable to packet sniffing and reducing the amount of effort an attacker must expend to crack user passwords. To disable this ability and better secure your workstations, follow these steps: Go to Start | Run, and enter Regedit. Navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\ control\LSA. Find the LMCompatibilityLevel value. Also read :  how to become a cyber security engineer  

  PRTG is an option geared more at larger networks that span several locations, or even countries. It has strong monitoring focused around downtime prevention and prediction, but also boasts many of the stronger granular tools to let you examine traffic on a smaller scale in terms of users and protocols. Similar to SolarWinds' software above, PRTG tries to be much more preventative than palliative. Alerts and monitoring attempt to predict and prevent the occurrence of problems by using metrics and history to find trends and alert you before it reaches a catastrophic point. Coupled with PRTG's ability to examine bandwidth on a smaller scale gives you an overall balanced tool for network monitoring on a large scale. find more :  cyber security engineer career

  Your network is probably the least visible piece of your infrastructure, but network outages can cause highly visible problems for your business. In one study, 90 percent of businesses had at least one network outage during the past year, with many experiencing two or more. The costs of those outages are high. It’s hard to pin them down exactly, but some estimates have them running over $9,000 every minute the systems are down. With more than half of outages lasting over an hour, that’s a significant cost. And the cost of the outage can linger even after systems are back up, due to overtime needed to catch up on the work delayed during the outage, the need to pay for expedited shipping to fulfill orders, damage to your company’s reputation, and loss of customer trust and future business. Address the Causes of Downtime Most of that downtime is due to equipment failures, followed by human errors. Reducing downtime and its associated costs requires addressing both the technical and peop

    Technology continues to change and improve, evolving faster and faster as it advances. Along with it, careers in the information technology industry also continue to grow. As a network engineer, you will be in the heart of the technological realm. You will have a wide range of duties that include designing, building, and maintaining computer networks for the organization you work for. These networks also vary widely – from a simple system that you can handle alone to a complicated system of LANs, WANs, intranets, and extranets that it takes a whole IT team to manage. There are a variety of fantastic reasons to become a network engineer including great pay, reputable companies to work for, and working with some of the most advanced technology available. While being a network engineer can be demanding work, you’ll find that the work is satisfying and that the benefits far outweigh any drawbacks. Responsibilities of a Network Engineer Network engineers are responsible for an organizat

 To remotely boot a computer on a network, you'll need a "Wake-On-LAN" supported network adapter. Once the adapter is installed, the computer can be "pinged" from another computer on the network to initiate the boot sequence. A ping is a signal sent from one computer to another and can be sent directly from the Command Prompt in Windows. Step 1 Open the "Start" menu on the computer that will be pinged, then type "CMD" into the Search box and press "Enter." Step 2 Type "ipconfig/all" then press "Enter." Make note of the following items: Physical address, IP address and subnet mask. Step 3 Open the Command Prompt on the computer from which you will be sending the wake-on-LAN command. Type "ping" followed by the computer that you will be sending the wake-on-LAN command's IP address. For example, if the IP address is "192.168.1.1," type "ping 192.168.1.1" and press the "Enter&qu

 A broadcast domain is a logical division of a computer network, in which all nodes can reach each other by broadcast at the data link layer. Let’s say you have several computers connected to a Layer 2 switch. The reason the device is called a Layer 2 switch is that the hardware learns and stores the MAC address (also known as the physical address) of a device’s network cards. By storing those hexadecimal numbers, the switch can make intelligent decisions about how to route packets to and from a specific device. Layer 2 switches can also be configured with VLANs to service multiple networks. Since the switch has learned about the devices that are connected, it also knows (from the switch configuration) what network those devices are connected to. What exactly a broadcast domain does From our definition of a broadcast domain, we can also state that a broadcast describes a process that forwards packets to all machines on the network. Only devices communicating within a given network will

you will be able to bring back your PC to a like-new state and rid yourself of those problematic and lingering errors. Of all the PC optimizers we tried and tested, WiseCare 365 delivered full repair every time. It does an incredible job of finding errors that are well hidden deep within the Windows operating system. What's not to like here, perfect repairs on a smooth running machine that stays that way, as any future slowdowns and problems are immediately nipped in the bud. WiseCare 365 solves stubborn PC problems that many other optimization programs overlook. That is its' true strength, full and extensive repair with advanced optimization to improve PC and Internet performance. Let me explain how many PC problems manifest themselves. Annoying errors are sometimes caused by weak uninstalls by shoddily programmed software. The leftover remnants in the Windows registry can cause corruption affecting your system speed and stability. By running the comprehensive WiseCare 365 rep

 There are several ways to hook up individual computers into a network. One is to use hardware routers to link up the network segments. If you buy hardware bridges, those will also connect the computers with each other. In Windows XP, simply clicking the "Bridge Connections" icon joins parts of a network together, even if the parts use different media to link their segments. Advantages Using a router or a hardware bridge requires buying more equipment to connect your computers. With a wireless router, each computer and network segment needs its own Internet Protocol (IP) address in order to direct data to the right computer. Both methods may require an IT professional or experienced amateur to connect everything properly. With Windows XP, building a bridging connection requires just a few clicks of your mouse in the right places. Bridging To make a bridge, you must log in as an administrator on your network or your computer. Click the computer's "Control Panel,"

There are several ways to hook up individual computers into a network. One is to use hardware routers to link up the network segments. If you buy hardware bridges, those will also connect the computers with each other. In Windows XP, simply clicking the "Bridge Connections" icon joins parts of a network together, even if the parts use different media to link their segments. Advantages Using a router or a hardware bridge requires buying more equipment to connect your computers. With a wireless router, each computer and network segment needs its own Internet Protocol (IP) address in order to direct data to the right computer. Both methods may require an IT professional or experienced amateur to connect everything properly. With Windows XP, building a bridging connection requires just a few clicks of your mouse in the right places. Bridging To make a bridge, you must log in as an administrator on your network or your computer. Click the computer's "Control Panel,"

  A modem security key is used to protect users from any potential intruders that may want to use their network to connect to the Internet. Security keys can often be forgotten. Consequently, users can't connect to the Internet using their own modem. However, there are ways you can get your original security key, but you should keep it handy in a safe place. 2wire Modem Default Security Key Step 1 Grab a paper and pen. Step 2 Look on the bottom of your modem, below the serial number and bar code. Step 3 Write down the 10-digit number with brackets around it. That is your default security key. read more :  cyber security engineer careers

 Your network is probably the least visible piece of your infrastructure, but network outages can cause highly visible problems for your business. In one study, 90 percent of businesses had at least one network outage during the past year, with many experiencing two or more. The costs of those outages are high. It’s hard to pin them down exactly, but some estimates have them running over $9,000 every minute the systems are down. With more than half of outages lasting over an hour, that’s a significant cost. And the cost of the outage can linger even after systems are back up, due to overtime needed to catch up on the work delayed during the outage, the need to pay for expedited shipping to fulfill orders, damage to your company’s reputation, and loss of customer trust and future business. Address the Causes of Downtime Most of that downtime is due to equipment failures, followed by human errors. Reducing downtime and its associated costs requires addressing both the technical and peopl

  Different communication requirements necessitate different network solutions, and these different network protocols can create significant problems of compatibility when networks are interconnected with one another. In order to overcome some of these interconnection problems, the open systems interconnection (OSI) was approved in 1983 as an international standard for communications architecture by the International Organization for Standardization (ISO) and the International Telegraph and Telephone Consultative Committee (CCITT).  The OSI model, as shown in the figure, consists of seven layers, each of which is selected to perform a well-defined function at a different level of abstraction. The bottom three layers provide for the timely and correct transfer of data, and the top four ensure that arriving data are recognizable and useful. While all seven layers are usually necessary at each user location, only the bottom three are normally employed at a network node, since nodes are co

  Requiring your users to use complex passwords and enforcing that policy is useless if you authenticate and locally store easily cracked password files. By default, Windows NT, 2000, and XP locally store legacy LAN Manager (LM) password hashes (LANMAN hashes). LM uses a weak encryption scheme to store passwords, and hackers can usually crack it in a very short period of time. Windows stores LM hashes in the Security Account Manager (SAM) database. By default, clients have LAN Manager authentication enabled, and servers accept this authentication. This allows workstations to send weak LM hashes across the network, making Windows authentication vulnerable to packet sniffing and reducing the amount of effort an attacker must expend to crack user passwords. To disable this ability and better secure your workstations, follow these steps: Go to Start | Run, and enter Regedit. Navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\ control\LSA. Find the LMCompatibilityLevel value. Also read