Very short type questions,
Q1. What is the difference between LAN, WAN and WAN?
Q2. What is foreign key?
Q3. How is a computer network useful?
Q4. What is the use of report?
Q5. Explain any three types of virus.
Answers
Answer:
A LAN (local area network) is a group of computers and network devices connected together, usually within the same building. ... A WAN (wide area network), in comparison to a MAN, is not restricted to a geographical location, although it might be confined within the bounds of a state or country.
Definition: Foreign keys are the columns of a table that points to the primary key of another table. They act as a cross-reference between tables. For example: In the below example the Stu_Id column in Course_enrollment table is a foreign key as it points to the primary key of the Student table.
Computer networks help users on the network to share the resources and in communication. ... File sharing: Networking of computers helps the network users to share data files. Hardware sharing: Users can share devices such as printers, scanners, CD-ROM drives, hard drives etc.
The Purpose of Reports. Reports communicate information which has been compiled as a result of research and analysis of data and of issues. Reports can cover a wide range of topics, but usually focus on transmitting information with a clear purpose, to a specific audience.
3 Types of Viruses are: Boot Sector Virus. Direct Action Virus. Resident Virus.