WIDE AREA NETWORK(WAN)
By: siddhi pol, manav parekh
Definition of wide area network (WAN):
Wide area network (WAN) may be a sort of network that gives transmission of voice, data, images, and videos over the massive geographic area . WAN is formed with the combinations of LAN and MAN. The transmission of knowledge is administered with the assistance of hubs, switches, fiber optics, modem, and routers. To transfer data from any computer over the web we use some technologies including:
1. ISDN (Integrated service digital network)
2. SMDS (Switched multimegabit data server)
3. SONET (Synchronous optical network)
4. HDLC (High data link control)
5. SDLC (Synchronous data link control)
6. Frame relay
Wide area network (WAN) diagram:
Advantages of a wide area network (WAN)
Covers large geographical area:
Wan covers a large geographical area of 1000 km or more If your office is in different cities or countries then you can connect your office branches through wan. ISP (Internet service provider) can offer you leased lines by which you’ll connect different branch offices together.
Centralized data:
Your company doesn’t got to buy email, files, and backup servers, they will all reside on head office. All office branches can share the info through the top office server. You can revisit up, support, and other useful data from the top office and every one data are synchronized with all other office branches.
Get updated files and data:
Software companies beat the live server to exchange updated files. So all the coders and office get updated version of files within seconds.
A lot of application to exchange messages:
With IOT (Internet of things) and new LAN technologies, messages are being transmitted fast. A lot of web applications are available like Facebook messenger, WhatsApp, Skype by which you can communicate with friends via text, voice and video chat.
Disadvantages of a wide area network (WAN)
Security problems:
WAN has more security problem as compare to MAN and LAN. WAN has many technologies combined with one another which may create a security gap.
Needs firewall and antivirus software:
As data transferred on the web are often accessed and altered by hackers so firewall must be enabled within the computer. Some people also can inject an epidemic into the pc so antivirus software must be installed. Other security software also must be installed on different points in WAN.
The setup cost is high:
Setting up WAN for the primary time in office costs higher money. It may involve purchasing routers, switches, and additional security software.
Troubleshooting problems:
As WAN covers tons of areas so fixing the matter in it’s difficult. Most of WAN wires enter the ocean and wires get broken sometimes. It involves tons of resources to repair lines under the ocean . In ISP (Internet service provider) head office many of internet lines, routers are mixed up in rooms and fixing issues on the internet requires a full-time staff.
Server down and disconnection issue:
In some areas, ISP faces problems thanks to electricity supply or bad lines structure. Customers often face connectivity issues or slow Internet speed issues. The solution to the present is to get a fanatical line from ISP.
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Examples of wide area network (WAN)
• Internet
• U.S defense department
• Most big banks
• Airline companies
• Stock brokerages
• Railway reservations counter
• Large telecommunications companies like Airtel store IT department
• Satellite systems
• Cable companies
• Network providers.
