Networking Courses Online

ANTFARM is a passive network mapping application that utilizes output from existing network examination tools to populate its OSI-modeled database. This data can then be used to form a ‘picture’ of the network being analyzed. ANTFARM is a data fusion tool that does not directly interact with the network. The analyst can use a variety of passive or active data gathering techniques, the outputs of which are loaded into ANTFARM and incorporated into the network map. Data gathering can be limited to completely passive techniques when minimizing the risk of disrupting the operational network is a concern. Code development takes place from GitHub. The latest source code for each ANTFARM release is mirrored at the RubyForge project as well as SCM. 

Although physical MAC addresses are permanent by design, several mechanisms allow modification, or "spoofing", of the MAC address that is reported by the operating system. This can be useful for privacy reasons, for instance when connecting to a Wi-Fi hotspot, or to ensure interoperability. Some Internet service providers bind their service to a specific MAC address; if the user then changes their network card or intends to install a router, the service won't work anymore. Changing the MAC address of the new interface will solve the problem. Similarly, some software licenses are bound to a specific MAC address. Changing the MAC address in this way is not permanent: after a reboot, it will revert to the MAC address physically stored in the card. Other methods of changing the MAC address are permanent; at least one network card manufacturer bundles networking hardware with software that allows the user to change the MAC address. These network cards usually come with a bootable CD-ROM that executes a utility that permits the user to change the MAC address burned into the EEPROM. When a hardware-based solution is not utilized, the user who intends to change the MAC address must instead rely on a software-based solution. The appropriate software solution is dependent on the operating system installed on the computer. Various software-based solutions are described below. As a MAC address can be changed, it can be unwise to rely on this as a single method of authentication. IEEE.1x is a standard better suited to authenticating devices at a low level.

VisualizeMnist

This course is real-time visualization of a network recognizing digits from user's input. I trained a network using MNIST dataset and parsed the weight data in python. With this data, I implemented my own custom functions that are needed to run the network in Processing including matrix multiplication function, activation functions. At first trial, because MNIST dataset is preprocessed for numbers to be in the center of the images, there was a precision problem when the user's input is placed little bit far away from the center. I used data augmentation technic in the training process to resolve this problem.