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An extranet is an extension of an intranet that allows secure communications to users outside of the intranet (e.g.
Code-division multiple access-based systems use a wider frequency band to achieve the same rate of transmission as FDMA, but this is compensated for by the ability to use a frequency reuse factor of 1, for example using a reuse pattern of 1/1.
The physical link technologies of packet network typically limit the size of packets to a certain maximum transmission unit (MTU). A bit stream's bandwidth is proportional to the average consumed signal bandwidth in hertz (the average spectral bandwidth of the analog signal representing the bit stream) during a studied time interval. IEEE 802.1Q describes VLANs, and IEEE 802.1X defines a port-based Network Access Control protocol, which forms the basis for the authentication mechanisms used in VLANs (but it is also found in WLANs) – it is what the home user sees when the user has to enter a "wireless access key".
Another method to avoid the negative effects of network congestion is implementing priority schemes, so that some packets are transmitted with higher priority than others. As an example, with FDDI, the network topology is a ring, but the physical topology is often a star, because all neighboring connections can be routed via a central physical location. Network services are applications hosted by servers on a computer network, to provide some functionality for members or users of the network, or to help the network itself to operate. P. Key, D. Smith.
The transmission media (often referred to in the literature as the physical medium) used to link devices to form a computer network include electrical cable, optical fiber, and free space. A large intranet typically has at least one web server to provide users with organizational information.
The three different paging procedures generally adopted are sequential, parallel and selective paging. In a primitive taxi system, when the taxi moved away from a first tower and closer to a second tower, the taxi driver manually switched from one frequency to another as needed. In 1977, the first long-distance fiber network was deployed by GTE in Long Beach, California. Most commonly, an intranet is the internal LAN of an organization. [13], The frequency reuse factor is the rate at which the same frequency can be used in the network. Network security is used on a variety of computer networks, both public and private, to secure daily transactions and communications among businesses, government agencies and individuals.
Regulation, technology, and markets.
To do this one or more carrier signals are modulated by the digital signal to produce an analog signal that can be tailored to give the required properties for transmission. A third method to avoid network congestion is the explicit allocation of network resources to specific flows. Communication protocols have various characteristics. [51] Intranets do not have to be connected to the Internet, but generally have a limited connection.
For other uses, see, Note: This template roughly follows the 2012. These base stations provide the cell with the network coverage which can be used for transmission of voice, data, and other types of content. The nodes of a computer network may be classified by many means as personal computers, servers, networking hardware, or general purpose hosts. For example, state transition diagrams are often used to model queuing performance in a circuit-switched network. The intranet uses the IP protocol and IP-based tools such as web browsers and file transfer applications.
It uses asynchronous time-division multiplexing and encodes data into small, fixed-sized cells. At the time, the dominant web browser was Netscape Navigator.
In general, the more interconnections there are, the more robust the network is; but the more expensive it is to install.
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