A database is a series of facts equipped in such a way that it can be effortlessly accessed, managed and updated. The database is used in a range of applications, consisting of business, education, healthcare, and government. Examples of databases are purchaser relationship administration (such as Salesforce), stock management, and worker databases.
In a database, records is commonly prepared in tables, with every desk representing a facts type. For example, a client database would possibly have separate tables for client records (such as name, address, cellphone number), buy history, and client inquiries. Databases can be accessed and managed the usage of a language known as SQL (Structured Query Language), which approves customers to retrieve and adjust statistics from the database.
Types of computer networks:
There are several types of computer networks including LAN (Local Area Network), WAN (Wide Area Network), MAN (Metropolitan Area Network), and WLAN (Wireless Local Area Network).
- LAN: A LAN is a computer network that is confined to a relatively small area, such as a single building or a group of buildings. An example of a LAN is the network in a school or office building.
- WAN: A WAN is a computer network that covers a larger geographical area, such as a city or even a country. The internet is the largest example of a WAN.
- MAN: A MAN is a computer network that is larger than a LAN but smaller than a WAN. A MAN can cover an entire city or a large campus.
- WLAN: A WLAN is a wireless computer network that connects devices using wireless communication technologies such as Wi-Fi. An example of a WLAN is the network in a coffee shop or airport.
- Network topology: The physical layout of devices and their interconnections is called network topology. Some common network topologies include bus, star, mesh, and ring.
- Network protocols: Network protocols are a set of rules that govern how devices communicate with each other. Some common network protocols include TCP/IP, HTTP, FTP, and SMTP.
- Advantages of computer networks: Computer networks allow devices to share resources such as printers, files, and internet connectivity. They also allow for efficient communication and collaboration among users.