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Asslamualaikum wbt,

This blog for my practical science computer for this sem. 

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                                                 NETWORK TOPOLOGY NETWORK TOPOLOGY A network topology refers to the  layout of the computers and devices in a communications network. PHYSICAL TOPOLOGY The  arrangement of a cabling  is the physical topology. LOGICAL TOPOLOGY The  path that data travels between computers  on a network is the logical topology. Types of Network Topologies. STAR TOPOLOGY All the  computers and other devices on the network connect to a central device , thus forming a  star . Two types  of devices that provide a common   central connection point  to all the other devices on the network are a  hub  and a  switch . The device that provides a common  central connection  point for other devices on a  ne...
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computer ETHICS & SECURITY

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Rules of Netiquette • Netiquette, or net etiquette , refers to etiquette on the Internet .  • Is the code of acceptable behaviours users should follow while on the Internet or online or cyberspace . • It is the conduct expected of individuals while online . • Rules for all aspects of the: q World Wide Web q E-mail q Instant Messaging q Chat rooms q Newsgroups & message board.                                              When do these rules apply? Anytime when you are using… • Chatting online   • Using email • Posting to a discussion • Blogging • Playing online games       Areas of computer ethics Definition of Computer Ethics: The moral guidelines that govern the use of computers, mobile devices and information systems. Information Accuracy • One of the concern ...
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Computer Security

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computer security risks Definition of computer security risk: Any event or action that could cause a loss of or damage to computer hardware, software, data, information or processing capability.   Malicious code • Malicious code is code causing damage to a computer or system . It is code not easily or solely controlled through the use of anti-virus tools. • Definition : A computer virus is a potentially damaging computer program that affects or infects, a computer negatively by altering the way the computer works without the user’s knowledge or permission. • Examples: Melissa, Tequila, Cascade, Invader   • A worm is a program that copies itself repeatedly . • Examples: Jerusalem, Sobig ,    Nimda , Morris Worm • A program that hides within or looks like a legitimate program . It does not replicate itself to other computers • Examples: Netbus , Back Orifice, Subseven , Beast Unauthorized access & use • To help prev...
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