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          Unit 1 - Physical layer          Computer Network: - A computer network is a group of two or more interconnected computer systems. You can establish a network connection using either cable or wireless media. Every network involves hardware and software that connects computers and tools. Goals and Applications of networks:-   Network goals:- The main goals of network as follows. Resource sharing:-   This is the main aim of a computer network. It means to make all  programs peripherals and data available to any one computer on the network to all other  computers in the network without regard to the physical locations of them. Thus user at large  distances can share the resources or can see data of a computer in the same way that a local user  uses them. Another aspect of resource sharing is load sharing. That is if required, a job can be  performed using various computers in network by portionin...

In the comparison of Adobe After Effect, is considered transcendent to Houdini software. It is used to 3D animation, motion graphics as well as VFX plus rendering.

For the digital acquisition of an image, there are two kinds of image sensors, which include CCD and CMOS. Both have a similar imaging quality. However, there is a significant difference in their key functions and other features. The charge-coupled device (CCD) image sensor is based on an analog system. The charge reaching the CCD edge is transmitted to a digital or analog converter that converts the charge into a digital value for each pixel. CMOS sensors are more efficient in generating a digital image and consume less power than a CCD. They can be larger than a CCD, enabling high-resolution images, and their manufacture is more economical when compared to a CCD.

A electrical relay is an electronically operated switch that is remotely activated by an electromagnet which pulls a set of contacts to either make or break a circuit. Electrical relays are commonly used for switching signals, radio frequencies as well as high current circuits.

Keylogger is type of spyware as well as monitoring software program. It is two types, Hardware( portable hacking device) and software( that gives hacker access to personal data) keylogger. Keyloggers are used for legitmate purposes like feedback, for software development but can be misused by criminals to steal your personal data.

Xerosploit is penetration testing tool of Linux. It is used, in the Sniffing, port scanning, image replacement, advanced MITM(Man in the middle attack) as well as DOS (Denial of service) attack plus (HTML+ Jawa script) code injection etc.

To gain something, you have to lose something whether are success or anything of world