array of electronic, wireless, and optical networking technologies. The Internet carries an extensive range of information resources and services, such as the inter-linked hypertext documents and applications of the World Wide Web (WWW), the infrastructure to support email, and peer-to-peer networks for file sharing and telephony.
The local area network is a limited distance within the network usually within a geographic location. Wide area network is a large-scale network, which can be controlled and shared resources. It is bigger than a local area network. Internet is global, the most extensive. It can obtain a large amount of information resources, to understand the market demand survey. Three data communication system has its own advantages, so it should be combined with each other, the development of enterprises will be better.
5.0 Benefits of data communication systems
Local Area Network
Through the sharing of software and hardware, local area network can reduce the cost. Therefore, companies can share resources, such as printers, to save costs. Secondly, the local area network provides an opportunity to communicate with others, which means that the manager can communicate with the local area network more easily. Third, local area network allows companies to set permissions, so different levels of management can share different information and files.
Wide Area Network
WAN is more convenient, when a company needs a long distance communication. Wide area network transmission speed is good, the transmission of large amounts of data. and transmission range is wider .It can help companies solve the problem of remote communication and management. In addition, the wide area network can save time and money.
Internet
The Internet provides a wealth of information resources and services. The Internet can help companies advertise, so as to enhance the company's reputation.
6.0 Three Threats
6.1Computer Hackers
Computer hacker is a computer system which is obtained from the unauthorized access. These hackers enter the system and other reasons to test their computer skills, in some way or cause damage to the system effectiveness. Hackers are usually trying to access access through telecommunications links. Traditionally, hackers have referred to the process of writing code, hackers are skilled computer programmers.
Crown Catering Services enterprises should set up different system permissions and install security software. The company may require professional processing system vulnerabilities. 6.2 Virus
Computer virus is an artificial program or code segment. But these codes have an unexpected negative impact. It will result in the loss of data, create additional file copy, delete files from hard disk and disable system, and destroy data. Computer viruses are ubiquitous, they are usually downloaded from the Internet or via email and they can self replicate.
Crown catering service enterprises to hire network security engineers, and set up a firewall to prevent virus intrusion.
6.3 Data theft
Data theft is a mistake and accident caused by human error. This is an increasingly serious phenomenon mainly caused by system administrators and office staff access
technology such as database servers, and some people can not evaluate their information needs, their emotions will affect performance.
Crown catering service enterprises should be rented in the interior of the security and the installation of cameras, so as to better avoid the threat of thieves.
7.0 ICT innovations
7.1 Wi-Fi
Wi-Fi is a wireless local area network technology, which allows the electronic device network, which is mainly used in the 2.4 MHz (12 cm) and 5 MHz (6 cm) ISM SHF radio frequency band. On the one hand, Wi-Fi can help managers and employees to transfer information and decision-making. For example, managers and employees can use Wi-Fi to attend a meeting to discuss the introduction of new products or do performance evaluation. On the other hand, Wi-Fi can provide better service to customers. Customers can connect to the Internet through Wi-Fi, watching movies or browse the title. At present, each public service activity place provides Wi-Fi services. If there is no Wi-Fi service, the company will lose part of the competitiveness.
7.2 Broadband
Broadband is a high-bandwidth Internet connection, the use of ADSL (Asymmetric Digital Subscriber Line) to send or download information. Broadband can be connected through telephone lines, cables, modems, and wireless networks. Broadband can be used for video conferencing, it is necessary to. It can help entire firm to access the Internet faster and more easily. A large number of graphics, images and video can be through broadband. In one word, broadband can save time and money, it is faster, and promotes greater productivity within the organization.
7.3 Shopping Cart
A shopping cart is similar to a visit to the supernarket,the difference being that you are able to go shopping online without leaving the office or you house.Shopping cart
software allows you to implement your online storefront on the Internet,The software keeps a record of what users have ordered and allows them to add or remove items from a virtual shopping cartWhen visitors decide to make a purchase,information including the buyer's name,address and billing instruction is emailed to the site webmaster and a receipt is send out.Shopping cart saves time, but also helps to reduce spending, shopping cart will provide a better experience for customers.