Bluetooth devices form a master slave like structure while pairing and use bit hardware address of a master, shared bit random number, and a user-specified PIN of up to bits. It is assumed that the Bluetooth network is secured; unfortunately it is possible to break the Bluetooth network [Shaked, Y.
To protect Bluetooth devices, users need to change default setting and choose strong PINs. Two devices take about 30 milliseconds to get associated. IEEE To provide network security, ZigBee runs in two different security modes: Residential mode and Commercial mode. In residential mode, all users use pre-deployed key for the entire PAN and for all applications.
Residential mode security protects the PAN from external eavesdroppers; however it does not provide the security from the user within the same PAN. In Commercial mode, the coordinator node in a trust center is used to pre-share the two master keys that provide extra security on top of residential mode. This method is costly since infrastructure is needed to have centralized coordinator node for the trust center to store sessions for each links. To attack this type of networks, the attacker should be close enough to the UWB network.
There are no standard security modes in UWB networks. According to WiMedia [ECMA International, ] there are three levels of link-layer security: Security Level 0 in which communication is fully unencrypted, Security Level 1 which has both encrypted communications with AES for encrypted links and unencrypted communications for unencrypted links, and Security Level 2 in which all communications must be encrypted with AES Offer does not apply to e-Collections and exclusions of select titles may apply.
This is often achieved via networks of sending and receiving equipment, wires and satellite links. The technologies involved in communication tend to be complex. You certainly don't need to understand them for your ICT course. However, there are aspects of digital communications that you needs to be aware of.
These relate primarily to the types of network and the ways of connecting to the Internet. Let's look at these two briefly further revision notes provide much more detail to support your study. Internal networks Usually referred to as a local area network LAN , this involves linking a number of hardware items input and output devices plus computer processing together within an office or building. The aim of a LAN is to be able to share hardware facilities such as printers or scanners, software applications and data.
This type of network is invaluable in the office environment where colleagues need to have access to common data or programmes. External networks Often you need to communicate with someone outside your internal network, in this case you will need to be part of a Wide Area Network WAN. The Internet is the ultimate WAN - it is a vast network of networks.
Moreover, as information technology protocols, applications, utilities and services are constantly changing, nothing in these guidelines restricts the authority of the relevant offices from initiating new rules or guidelines as circumstances dictate or as technology evolves.
Whether or not an amount of personal use would be considered reasonable would depend on the particular circumstances and the applicable laws and policies. Users of University ICT are required to abide by all applicable laws and policies in addition to these guidelines. Reasonable personal use does not include in any circumstances the visiting of pornographic websites, the storage or distribution of pornographic material, or the accessing, storage or distribution of unlawful or otherwise inappropriate within the meaning of the guidelines information.
Digital Divide: The technological gap between countries that have fully exploited ICT and those that have not. E-Commerce Electronic Commerce: Business activities involving consumers, manufacturers, suppliers, service providers and intermediaries using computer networks such as the Internet.
Global Information Infrastructure GII : The components making up a wide area network arising from multiple heterogeneous networks, which facilitate multidimensional communication among different nations, business and organisations. Information and Communication Technologies ICT : Is a generic term used to express the convergence of information technology, broadcasting and communications. One prominent example is the Internet. Information Society IS : A country or region where information technology has been fully exploited and is part of everyday life as an enabler of information sharing, communication and diffusion.
Information Technology IT : Embraces the use of computers, telecommunications and office systems technologies for the collection, processing, storing, packaging and dissemination of information. Knowledge Based Economy KBE : A country or region where ICT is extensively used to enhance knowledge so that higher human capital brings further improvement to the economy. Most LANs are confined to a single building or group of buildings.
Teledensity: The number of telephones per people in a region. This allows the pupils to gain an understanding of the principles and values associated with computers, networks and peripherals without having real computers in their schools. First Generation 1G 1G emerged in s. It contains Analog System and popularly known as cell phones.
It has low capacity, unreliable handoff, poor voice links, and no security at all since voice calls were played back in radio towers, making these calls susceptible to unwanted eavesdropping by third parties. Second Generation 2G 2G emerged in late s. It uses digital signals for voice transmission and has speed of 64 kbps. Next to 2G, 2. The data are sent through the technology called Packet Switching.
Voice calls are interpreted through Circuit Switching. It operates at a range of MHz and has a bandwidth of MHz used for High-speed internet service, video chatting. Fourth Generation 4G 4G offers a downloading speed of Mbps. V programs with more clarity and send Data much faster than previous generations. It is a common platform for all radio access technologies. The AIPN uses packet switching and its continuous evolution provides optimized performance and cost.
In fifth generation Network Architecture consist of a user terminal which has a crucial role in the new architecture and a number of independent, autonomous radio access technologies RAT. Cloud computing is a model for convenient on-demand network access to configurable computing resources e. Cloud computing allows consumers to use applications without installation and access their personal data at any computer with internet access.
The main challenge for a RMTC is to deal with increasing different radio access technologies. The core is a convergence of the nanotechnology, cloud computing and radio, and based on All IP Platform. Interoperability process-criteria and mechanisms enable both terminal and RMTC to select from heterogeneous access systems. Hence, cloud computing is a technology that uses the internet and central remote server to maintain data and applications.
In 5G networks this central remote server could be a content provider. Cloud computing allows consumers and business to use applications without installation and access their personal files at any computer with internet access. The same concept is going to be used in multi -core technology where the user tries to access his private account form a global content provider through cloud computing.
The measurement of traffic is a basic control activity in order to provide Quality of Service. Quality of service also involves controlling and managing network resources by setting priorities for specific types of data video, audio, files on the network. The primary goal of quality of service is to provide priority to networks, including dedicated bandwidth, controlled jitter, low latency and improved loss characteristics.
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