# Metropolitan Area Network ## What is a MAN A Metropolitan Area Network, abbreviated as MAN, is a network that covers a geographic area larger than a LAN but smaller than a WAN. Typically, a MAN covers a city or a large campus. The coverage area can range from a few kilometers to around 50 kilometers. MANs are designed to connect multiple LANs within a city and provide high-speed connectivity between them. ## Characteristics of MAN MANs typically offer higher speeds than WAN connections but cover a larger area than LANs. Data transfer speeds in a MAN typically range from 10 megabits per second to several gigabits per second. The network may be owned by a city government, a telecommunications company, or a large university. MANs usually use fiber optic cables as the primary transmission medium because of the distances involved. The infrastructure is more complex than a LAN and typically requires professional management. ## Technologies Used in MAN Fiber optic cables are the primary medium for MAN infrastructure because they support high speeds over long distances. WiMAX, which stands for Worldwide Interoperability for Microwave Access, is a wireless technology sometimes used for MANs. Metro Ethernet extends Ethernet technology to cover metropolitan distances. SONET and SDH are older technologies used in some MAN implementations for synchronous data transmission. ## Examples of MAN Cable television networks that provide internet services across an entire city operate as MANs. City governments sometimes build MANs to connect municipal buildings such as police stations, fire stations, and government offices. Universities with multiple campuses spread across a city may use a MAN to connect their campuses. Internet service providers operate MAN infrastructure to deliver broadband services to homes and businesses across a city. ## Advantages of MAN MANs provide connectivity across an entire city with higher speeds than typical WAN connections. They allow multiple LANs in different locations within a city to be connected efficiently. They support the needs of organizations with multiple sites in the same metropolitan area. Fiber optic based MANs offer very high bandwidth and low latency. ## Disadvantages of MAN MANs are more expensive to build and maintain than LANs. The infrastructure requires expertise to design and manage. If the MAN uses shared infrastructure operated by a telecommunications company, the organization has less control over the network. Extending a MAN requires digging up roads to lay cables, which is expensive and disruptive.