Cyber Technology

  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

  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

  Unfortunately, if you have failed to avoid ransomware, your first sign might be an encrypted or locked drive and a ransom note. If you run your malware and virus checker frequently with updated virus and malware definitions, your security software may detect the ransomware and alert you to its presence. You can then opt to quarantine and delete the ransomware. Hopefully, you never have to deal with your data being held hostage. Minimize damage by immediately isolating the machine — this critical to prevent further access to your network. At this stage, rebuild your system and download your backups. You may be able to recover many resources with a system restore. That is if you can access the system and are not locked out of it. Otherwise, you’ll have to reinstall everything from backups. If you’ve backed up your crucial data on a cloud server, you should be able to find a safe restore point. know more :  it network security job description

  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 education

  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

  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 con