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NETWORKING

LOCAL AREA NETWORK (LAN) WIRELESS NETWORKING PRIVATE SECURED NETWORK VIRTUAL PRIVATE NETWORK (VPN) LOCAL AREA NETWORK (LAN) A form of networking technology that implements a high-speed short distance method of computer communications, such as in a department, office, home or building. Most LANs connect together multiple devices so that users can use, for example, one printer or one set of applications instead of having an individual printer or application on each personal computer. LANs are capable of transmitting data at very fast rates, much faster than data can be transmitted over a telephone line; but the distances are limited, and there is also a limit on the number of computers that can be attached to a single LAN. The most common wiring technology for a LAN is Ethernet, although wireless technologies are evolving. Benefits of LAN: • Information can be easily shared allowing for quick and informed decisions to be made, saving time and money. • A more productive and competitive environment is achieved through greater teamwork within the organization. • Network-based communication such as email is considerably cheaper than using the phone or fax and sharing resources such as printers gives more efficient use of equipment at lower costs. • Standard versions of procedures and directories can be made accessible to everyone. • IT administration can be centralized. • Data can be backed-up from a single point on a scheduled basis ensuring consistency. • Everyone is working from real-time shared information and so reducing the risk of error. WIRELESS NETWORKING Mobility is no longer a barrier to productivity and efficiency but now provides a true competitive advantage. Accessing real-time data whilst at a client site, whilst traveling or whilst working outside of normal office hours now allows a more flexible and efficient approach to business processes. Wireless networking technology, fuelled by the emergence of cross-vendor industry standards such as IEEE 802.11, has produced a number of affordable solutions that are fast becoming a realistic business benefit for all types of industries where the installation of network cabling is not practical. 802.11 A group of specifications, developed by the Institute of Electrical and Electronics Engineers (IEEE), for wireless networks that are used to manage packet traffic over a network and ensure that packets do not collide - which could result in loss of data - while traveling from their point of origin to their destination. These are: 802.11, 802.11a, 802.11b and 802.11g. Each access point typically covers 50-100 meters of open space with current specs for 1, 2, 11 and 54 Mbps. It is intended to provide for interoperability of wireless LAN products from different manufacturers. For security and privacy, 802.11 accommodates the use of Wired Equivalent Privacy (WEP), a wireless authentication protocol based on I.D. keys and bit-encryption. • Temporary wireless networks can be easily set up for temporary office facilities, exhibitions and events. • Easily scalable and portable a wireless network access point can be installed without the disruption and costs associated with a cabled network point. • The wireless network can be extended or moved to areas where a cabled infrastructure wouldn't be cost-effective or practical to do so (a warehouse for example). • Businesses operating in listed buildings can adhere to restrictions that may effect the installation of a fixed-cable network. Benefits of Wireless Networking: • Reduction in total cost of ownership as costs such as cabling and office space can be radically reduced. • Business processes can be improved and the organization becomes more efficient as productivity rises. • Client meetings are more informed and therefore more productive. • Improving data availability, decision making and account management processes will improve client satisfaction. • Geographical and time restrictions are lifted, providing another competitive advantage. • No need for training on new devices as existing mobile devices can be used. • Freedom and flexibility in where they can work and when. • Improved client account management away from the office as real-time data can be made available at the client site. • Access to real-time data enabling more efficient and informed decision-making. PRIVATE SECURED NETWORK A Corporate Private Secured Network is a data communications network that spans a relatively large geographic area e.g. linking LANs between offices city wide, country wide or even worldwide. This system makes use of public networks, such as the Internet or dedicated communication lines and may be privately owned or rented. Gnet Cyber Zone uses various methods to connect clients multiple office locations to establish the Private Secure Network. In general Gnet Cyber Zone will connect the central HQ of the client in Dhaka through the Gnet Cyber Zone high capacity Fiber Optic Network. All branch offices within Dhaka and greater Dhaka are usually connected via the Gnet Cyber Zone NLOS Wireless Network. All branches of client outside Dhaka are connected via Satellite Network. Having the ability to use multiple modes of connectivity allows Gnet Cyber Zone to quickly, efficiently and cost effectively establish the Private Secure Network for the client. Benefits of a Private Secured Network:   • Information can be easily shared between multiple branches of a corporation allowing for quick and informed decisions to be made, saving time and money. • A more productive and competitive environment is achieved through greater teamwork across the organization. • Network-based communication such as email is considerably cheaper than using the phone or fax. • Standard versions of procedures and directories can be made accessible and implemented across the organization. • IT administration can be centralized. • Data can be backed-up from a single point on a scheduled basis ensuring consistency. • Everyone is working from real-time shared information and so reducing the risk of error. VIRTUAL PRIVATE NETWORK (VPN) Although the Gnet Cyber Zone Broadband Network is a fully secured Network, it is still advisable for clients to establish security which they have full control over and can manage independent of Gnet Cyber Zone. A Virtual Private Network uses the public telecommunications network, such as the Internet, rather than leased lines, which are very expensive, to transport encrypted traffic. VPNs are also recommended to secure 802.11b wireless LANs. The data being sent is encrypted and cannot be intercepted, read or otherwise interfered with. As VPNs use an existing shared wide area network (WAN) infrastructure, costs are lower and deployment is faster than traditional networks built through leased lines. A remote-access VPN can provide connections for employees from various remote locations. Remote workers can then dial-in and use the VPN client software to access the network. A site-to-site VPN provides connection to and from multiple sites. This can be Intranet- or Extranet- based. An Intranet-based VPN is used to connect LANs within the organization, whereas an Extranet-based VPN connects to other organizations providing a shared environment. Security: IP Sec (Internet Protocol Security Protocol) has two modes of encryption: • Tunnel - encrypts the header and the payload. • Transport - encrypts only the payload. AAA Servers (authentication, authorization and accounting servers) are used to increase security in a remote-access environment and will carry out the following checks: • Who the user is. • What the user is permitted to do. • What the user is actually doing. Benefits of VPN: Cost Savings The initial hardware investment may be slightly higher than that of a traditional wired network however the overall installation and operating costs are significantly lower. So in the long term the cost benefits outweigh the initial investment. Organizations can also save money by using home workers and contractors therefore reducing training, infrastructure and hardware maintenance costs. Improved Productivity   • Information can be easily shared between office to office allowing for quick and informed decisions to be made, saving time and money. • A more productive and competitive environment is achieved through greater teamwork across the organization. • Network-based communication such as email, chat, whiteboard, video conferencing is considerably cheaper than using the phone or fax. • Standard versions of procedures and directories can be made accessible and implemented across the organization. • IT administration can be centralized. • Data can be backed-up from a single point on a scheduled basis ensuring consistency. • Everyone is working from real-time shared information and so reducing the risk of error. Please call us at 019482730, 0152332158 or email us at gnetczone@yahoo.com for solution.

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