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1) Intranet:
An intranet is a network based on TCP/IP protocols (an internet) belonging to an organization, usually a corporation, accessible only by the organization's members, employees, or others with authorization. An intranet's Web sites look and act just like any other Web sites, but the firewall surrounding an intranet fends off unauthorized access.
2) NOS:
A network operating system (NOS) is a computer operating system system that is designed primarily to support workstation, personal computer, and, in some instances, older terminal that are connected on a local area network (LAN).
3) NFS:
A network file system (NFS) is a type of file system mechanism that enables the storage and retrieval of data from multiple disks and directories across a shared network. A network file system enables local users to access remote data and files in the same way they are accessed locally.
4) VPN
A virtual private network (VPN) extends a private network across a public network, such as the Internet. It enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network, and thus benefit from the functionality, security and management policies of the private network. A VPN is created by establishing a virtual point-to-point connection through the use of dedicated connections, virtual tunneling protocols, or traffic encryption.
1*Intranet:
An intranet is a private network that is contained within an enterprise. It may consist of many interlinked local area networks and also use leased lines in the wide area network. Typically, an intranet includes connections through one or more gateway computers to the outside Internet. The main purpose of an intranet is to share company information and computing resources among employees. An intranet can also be used to facilitate working in groups and for teleconferences.
An intranet uses TCP/IP, HTTP, and other Internet protocols and in general looks like a private version of the Internet. With tunneling, companies can send private messages through the public network, using the public network with special encryption/decryption and other security safeguards to connect one part of their intranet to another.
Typically, larger enterprises allow users within their intranet to access the public Internet through firewall servers that have the ability to screen messages in both directions so that company security is maintained. When part of an intranet is made accessible to customers, partners, suppliers, or others outside the company, that part becomes part of an extranet.
Local or restricted communications network, especially a private network created using World Wide Web software.
intranet is private company network
3) Private Company network
An intranet is an inward facing private network. This means that only people inside the company have access to it. It works just like the internet, except that the servers that provide the web pages are located inside the company's network, not on the internet.
Depending on how the intranet is configured, you can access the intranet over the internet (world wide web) using technologies such as VPN (Virtual Private Network) to gain access to the company's network, and from there access to the intranet.
Option 3 Intranet is a network which is used within a Private network, and in this connection a few sites are also restricted like proxy
3/An intranet is a computer network used within a company or other organizational entity that uses the same protocols as the Internet
