Metropolitan Area Network (MAN)
A metropolitan area network (MAN) is a network of computers that links people to computer resources throughout an area the size of a metropolis. When local area networks (LANs) in a city are connected to form a single, bigger network that might potentially provide an efficient link to a wide area network, this is referred to as a metropolitan area network, or MAN. The phrase is also used to refer to the process of connecting many local area networks in a metro region by means of point-to-point connections.
The Metropolitan Area Network, or MAN network, is a high-speed broadband network that is smaller than a wide area network (WAN) but covers a larger geographic area—such as a city or district—than a local area network (LAN). It also offers the capacity to integrate multiple services through the transmission of voice, video, and data over transmission media like copper, fiber optics, and microwaves.
The phrase might refer to a single network, as a cable television network, or it can describe a method of joining a certain number of local area networks (LANs) into a larger network so that resources can be shared across LANs and between devices. A MAN, for instance, may be used by a business to link the LANs of all of its offices, which are dispersed around the city. A MAN is a common tool used by government organizations and local libraries to communicate with the public and business sector. In addition, it may link MANs over a wider region than LANs. A MAN’s territorial boundaries might encompass a whole city.
Several LANs were linked via a local phone exchange (MAN). Asynchronous Transfer Mode (ATM), Frame Relay, X.25, ISDN (Integrated Services Digital Network), xDSL (Digital Subscriber Line), ADSL (Asymmetrical Digital Subscriber Line), WDM (Wavelength Division Modulation), etc. are a few of the commonly utilized MAN protocols. The protocols used for LANs and these are quite dissimilar.
A public utility provider, like a local telephone company, may offer a MAN as a service, or a private corporation may own and operate a MAN entirely. Multimegabit Data Switching Services (SMDS) is a highly well-liked MAN service offered by most telephone operators.
Because of its low latency (between 1 and 50 ms), excellent stability, and lack of radio interference, copper pair technology—which is currently the largest network in the world—is a great alternative for building metropolitan networks. The MAN LOOP networks offer speeds of 10 Mbit/s or 20 Mbit/s on copper pairs and 100 Mbit/s, 1 Gbit/s, and 10 Gbit/s through optical fiber.
Through the interconnection of various networks within the metropolitan area, the concept of a metropolitan area network represents an evolution of the local area network concept to a broader scope, covering larger areas that, in some cases, are not limited to an urban environment but can reach regional and even national coverage.
This kind of network is more expansive than a local area network (LAN) and is often built using a related technology. The primary distinction between a MAN and its corresponding category is that a standard, like to the IEEE standard, has been accepted for its operation.
Wide Area Networks (WAN) are used by corporations and clusters of corporate offices in close proximity to a metropolis. These networks lack switching components, directing packets via many possible output lines. These networks could be either private or public.
The metropolitan area’s networks, which have two unidirectional buses that are independent of one another in terms of data transmission, cover a particular geographic place known as the “city, the municipality,” and have a coverage distance of more than 4 km.
Metropolitan Area Network Applications
There are many and diverse uses for the Metropolitan Area Network (MAN); the primary ones are:
The introduction of VoIP (Voice over Internet Protocol) services in urban areas allows for the removal of “obsolete” old analog or ISDN phone lines, as well as the associated costs.
Local area networks (LAN) are connected.
When Wi-Fi zones are deployed without wireless backhaul (Femtocell), all available Wi-Fi channels are freed up, which improves user connectivity by more than 60%.
Interconnection of computers.
systems for local video surveillance.
CAD/CAM data transfer.
Wide-area network walkways (WAN).
For businesses that have several dependents in the same capital region, installing a metropolitan area network at the corporate level is essential. They also provide high latency guarantees for the transmission of voice, data, and video traffic.
MAN either open or closed
Public or private networks might be found in urban areas.
A large department or administration with buildings dispersed throughout the city, using its own MAN to carry all voice and data traffic between buildings and public operators to route external information, would be an example of a private MAN.
The data might be sent via dedicated bandwidth channels or packages between the various buildings.
Video applications may be used to connect buildings for collaborative projects, simulations, or gatherings.
The infrastructure that a telecom provider installs in a city to provide broadband services to its clients who live in this geographic area is an example of a public MAN.
nodes in the network
Citizen area networks are particularly helpful in public and private settings where there are a lot of tasks, since they enable the execution of more than 600 access nodes to the network.
Extension of a network
A 50 km diameter can be reached by metropolitan area networks, contingent on the extent of network training for the kind of cable and technology used. This diameter is thought to be adequate to contain a metro area. They may join to construct many networks, covering a whole city.
The separation between the nodes
Depending on the type of cable, metropolitan area networks allow several kilometers to separate access nodes. These are deemed enough lengths to link various structures inside a city or private camp.
High dependability
Reliability refers to the error rate of the network when it is in operation the error rate defined as the number of erroneous bits that transferred across the network. In general, the error rate for optical fiber is lower than that of copper cable with same length. The mistake rate not identified by the error detection techniques is on the order of 10-20. This function enables metropolitan area networks to operate in contexts where failures might be devastating, such as air traffic control.
The construction of municipal metropolitan networks would enable municipalities to have a high-performance infrastructure by providing them with a network comparable to that of Internet service providers. In this way, the town hall can connect new offices, remote users, or video cameras on public roads.
High security
Fiber optic provides a safe approach since it is not feasible to read or manipulate the optical transmission without physically disrupting the connection.
Real-time traffic
The metropolitan area networks guarantee minimum network access times, which allows for the inclusion of synchronous services necessary for real-time applications, where it is crucial that specific messages go through the network without delay even when the network load is high.
Between node and node, you can not have, for example, more than 100 kilometers of cable. Approximately 20 km of cable can approximate, but it not known at what moment information or data sent can be lost.
Synchronous services require a reservation of bandwidth; Such is the case of voice and video traffic. For this reason, metropolitan area networks are optimal networks for multimedia traffic environments, although not all metropolitan networks support isochronous traffic (information transmission at constant intervals).