Plagiarism involves copying others' work and claiming it as your own. There are two types: word-for-word copying without quotes and paraphrasing without citing the source. Students must always cite sources of information and images in assignments to avoid plagiarism. Consequences of plagiarism range from failing grades to legal punishment depending on educational level and profession. Netiquette refers to etiquette on the internet and involves practices like identifying yourself, being brief, avoiding profanity, and following basic rules like being patient and not breaking any laws.