What is an intranet and what is an extranet? Please advise!

Intranet refers to a group; System; Networks established for their own business needs and generally not connected to the Internet, such as: public security; Telecommunications; electricity and so on. Each has its own network, which is called an intranet compared to the Internet.

In simple terms. Intranet: A network that does not have access to the Internet at this stage is called a local area network. Commonly known as intranet.

Extranet: Ineternet is the basic network, commonly known as the extranet.

Intranet and extranet are for network security domains. The state has clearly stipulated that the internal network and the external network are physically separated, and the external network and the Internet are logically separated. Generally speaking, logical isolation can be achieved by taking firewalls, servers, etc. with strong security gateways.

The intranet, which is generally used to transmit internal confidential information, must be physically isolated from the external network.

The public network (external network) and the internal network are two types of Internet access methods.

Computers on the intranet access the Internet through a public gateway using the NAT (Network Address Translation) protocol. A computer on the intranet can send a connection request to other computers on the Internet, but other computers on the Internet cannot send a connection request to a computer on the intranet.

Public network access mode: The IP address obtained by the computer accessing the Internet is a non-reserved address on InetNet. Computers on the public network and other computers on the Internet can access each other at will.

The intranet is the local area network, and the extranet is the Internet

1. Intranet: also known as local area network (LAN), is a computer communication network composed of various computers, external devices and databases connected within a local geographical range (such as a school, factory and institution) within a radius of several thousand meters.

2. Public network: The public network is relative to the internal network.

The IP address obtained by the computer on the intranet is the reserved address on the inter; The IP address obtained by a computer on the Internet is the public address of the Internet, and it is a non-reserved address.

Computers on the public network and other computers on the Internet can access each other at will.

3. Extranet: Wide Area Network (English: Wide Area Network, abbreviated as WAN), also known as Wide Area Network and Extranet.

It is a remote network that connects computer communication between different regional bureaus and local area networks or metropolitan area networks.

It is usually spanning a large physical range, covering a range of tens to thousands of kilometers, and it can connect multiple regions, cities and countries, or across several continents and provide long-distance communication to form an international long-range network.

An intranet (LAN) is a network that connects multiple computers and devices together in a relatively small geographical area, such as an office, school, or home, through a physical connection (such as an Ethernet cable) or a wireless connection (such as Wi-Fi). Local area networks are often used to share files, printers, servers, and other resources, making it easy for devices to transfer and share data between them.

An extranet (WAN) is a network that covers a large geographical area, such as connecting different cities, countries, or continents. Wide area networks connect remote locations through the use of various communication technologies such as circuit switching, packet switching, and fiber optic transmission. Wide area networks provide the ability to transmit data over long distances, enabling computers and devices in remote locations to communicate with each other and access shared resources.

At present, the most common and cost-effective technology is SD-WAN enterprise networking.

Simply put, a LAN is a smaller network that is confined to a specific area, while a WAN is a larger network that connects locations that are far away. Local area networks are used for local internal communication and resource sharing, while wide area networks are used to connect remote locations and enable distributed communication and resource access.