Published: October 09, 2018

    Computer networks can be characterized by their size as well as their purpose. The size of a network can be expressed by the geographic area they occupy and the number of computers that are part of the network. Networks can cover anything from a handful of devices within a single room to millions of devices spread across the entire globe.



    • 2. Description Used for everything from accessing the internet or printing a document to downloading an attachment from an email, networks are the backbone of business today.
    • 3. Description Computer networks can be characterized by their size as well as their purpose. The size of a network can be expressed by the geographic area they occupy and the number of computers that are part of the network. Networks can cover anything from a handful of devices within a single room to millions of devices spread across the entire globe.
    • 4. Personal Area Network (PAN) Personal Area Network (PAN) A personal area network, or PAN, is a computer network organized around an individual person within a single building. This could be inside a small office or residence. A typical PAN would include one or more computers, telephones, peripheral devices, video game consoles, and other personal entertainment devices. If multiple individuals use the same network within a residence, the network is sometimes referred to as a home area network or HAN. In a very typical setup, a residence will have a single wired Internet connection connected to a modem. This modem then provides both wired and wireless connections for multiple devices. The network is typically managed from a single computer but can be accessed from any device. NEXT
    • 5. Local Area Network (LAN) Local Area Network (LAN) A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building. Many LANs use wireless technologies that are built into smartphones, tablet computers and laptops. In a wireless local area network, users may move unrestricted in the coverage area. Wireless networks have become popular in residences and small businesses, because of their ease of installation. Guests are often offered Internet access via a hotspot service. NEXT
    • 6. Local Area Network (LAN) Local Area Network (LAN) Simple LANs generally consist of cabling and one or more switches. A switch can be connected to a router, cable modem, or ADSL modem for Internet access. A LAN can include a wide variety of other network devices such as firewalls, load balancers, and network intrusion detection. Advanced LANs are characterized by their use of redundant links with switches using the spanning tree protocol to prevent loops, their ability to manage differing traffic types via quality of service and to segregate traffic with VLANs. NEXT
    • 7. Local Area Network (LAN) Local Area Network (LAN) LANs can maintain connections with other LANs via leased lines, leased services, or across the Internet using virtual private network technologies. Depending on how the connections are established and secured, and the distance involved, such linked LANs may also be classified as a metropolitan area network (MAN) or a wide area network (WAN). NEXT
    • 8. Local Area Network (LAN) Local Area Network (LAN) NEXT
    • 9. Metropolitan Area Network (MAN) Metropolitan Area Network (MAN) A metropolitan area network (MAN) is a computer network that interconnects users with computer resources in a geographic area or region larger than that covered by even a large local area network (LAN) but smaller than the area covered by a wide area network (WAN). The term MAN is applied to the interconnection of networks in a city into a single larger network which may then also offer efficient connection to a wide area network. The term is also used to describe the interconnection of several local area networks in a metropolitan area through the use of point-to-point connections between them. NEXT
    • 10. Wide Area Network (WAN) Wide Area Network (WAN) Wide area network (WAN) is a telecommunications network or computer network that extends over a large geographical distance place. Wide area networks are often established with leased telecommunication circuits. WANs are used to connect LANs and other types of networks together so that users and computers in one location can communicate with users and computers in other locations. Many WANs are built for one particular organization and are private. NEXT
    • 11. Wide Area Network (WAN) Wide Area Network (WAN) Others, built by Internet service providers, provide connections from an organization's LAN to the Internet. WANs are often built using leased lines. At each end of the leased line, a router connects the LAN on one side with a second router within the LAN on the other. Leased lines can be very expensive. Instead of using leased lines, WANs can also be built using less costly circuit switching or packet switching methods. Network protocols including TCP/IP deliver transport and addressing functions. Many technologies are available for wide area network links. Examples include circuit-switched telephone lines, radio wave transmission, an optical fiber. New developments in technologies have successively increased transmission rates. NEXT
    • 12. Wide Area Network (WAN) Wide Area Network (WAN) NEXT WAN
    • 13. Wireless Local Area Network (WLAN) Wireless Local Area Network (WLAN) A wireless LAN (WLAN) is a wireless computer network that links two or more devices using wireless communication to form a local area network (LAN) within a limited area such as a home, school, computer laboratory, campus, office building etc. This gives users the ability to move around within the area and yet still be connected to the network. Through a gateway, a WLAN can also provide a connection to the wider Internet. Wireless LANs have become popular for use in the home, due to their ease of installation and use. They are also popular in commercial properties that offer wireless access to their employees and customers. NEXT
    • 14. Campus Area Network (CAN) Campus Area Network (CAN) Larger than LANs, but smaller than metropolitan area networks (MANs, explained below), these types of networks are typically seen in universities, large school districts or small businesses. They can be spread across several buildings that are fairly close to each other so users can share resources. The range of CAN is 1 km to 5 km. If two buildings have the same domain and they are connected with a network, then it will be considered as CAN only. Though the CAN is mainly used for corporate campuses so the data link will be high speed. NEXT
    • 15. Storage-Area Network (SAN) Storage-Area Network (SAN) A storage area network (SAN) or storage network is a Computer network which provides access to consolidated, block level data storage. SANs are primarily used to enhance storage devices, such as disk arrays and tape libraries, accessible to servers so that the devices appear to the operating system as locally attached devices. A SAN typically is a separate network of storage devices not accessible through the local area network (LAN) by other devices. NEXT
    • 16. Storage-Area Network (SAN) Storage-Area Network (SAN) Storage area networks (SANs) are sometimes referred to as network behind the servers and historically developed out of the centralized data storage model, but with its own data network. A SAN is, at its simplest, a dedicated network for data storage. In addition to storing data, SANs allow for the automatic backup of data, and the monitoring of the storage as well as the backup process. NEXT
    • 17. Storage-Area Network (SAN) Storage-Area Network (SAN) SANs have their own networking devices, such as SAN switches. To access the SAN so-called SAN servers are used, which in turn connect to SAN interfaces. Within the SAN a range of data storage devices may be interconnected, such as SAN capable disk arrays, JBODS and tape libraries. Storage layer: On top of the Fibre, Channel-Switched Protocol is often the serialized Small Computer Systems Interface (SCSI) protocol, implemented in servers and SAN storage devices. It allows software applications to communicate, or encode data, for storage devices. The Internet Small Computer Systems Interface (iSCSI) over Ethernet and the Infiniband protocols may also be found implemented in SANs, but are often bridged into the fiber channel SAN. NEXT
    • 18. System-Area Network (also known as SAN) System-Area Network (also known as SAN) This term is fairly new within the past two decades. It is used to explain a relatively local network that is designed to provide high- speed connection in server-to-server applications (cluster environments), storage area networks (called “SANs” as well) and processor-to-processor applications. The computers connected on a SAN operate as a single system at very high speeds. NEXT
    • 19. Passive Optical Local Area Network (POLAN) Passive Optical Local Area Network (POLAN) As an alternative to traditional switch-based Ethernet LANs, POLAN technology can be integrated into structured cabling to overcome concerns about supporting traditional Ethernet protocols and network applications such as PoE (Power over Ethernet). A point-to-multipoint LAN architecture, POLAN uses optical splitters to split an optical signal from one strand of single-mode optical fiber into multiple signals to serve users and devices. NEXT
    • 20. Enterprise Private Network (EPN) Enterprise Private Network (EPN) These types of networks are built and owned by businesses that want to securely connect its various locations to share computer resources. NEXT
    • 21. Virtual Private Network (VPN) Virtual Private Network (VPN) NEXT
    • 22. Virtual Private Network (VPN) Virtual Private Network (VPN) By extending a private network across the Internet, a VPN lets its users send and receive data as if their devices were connected to the private network – even if they’re not. Through a virtual point-to-point connection, users can access a private network remotely. NEXT
    • 23. Virtual Private Network (VPN) Virtual Private Network (VPN) NEXT
    • 24. Thanks SOURCE: www.wikizero.pro, www.belden.com/blog/digital-building, www.lifewire.com/ Thanks