Answer The principal technologies and standards for wireless networking, communication, and Internet access are: Cellular networks are evolving toward high-speed, high-brandwidth, digital packet switched transmission. – Competing standards for cellular service • CDMA: United States • GSM: Rest of world, plus AT&T and T-Mobile – Third-generation (3G) networks • Suitable for broadband Internet access • 144 Kbps – 2Mbps – 4G networks • Entirely packet-switched • 100 Mbps – 1Gbps Wireless computer networks and Internet access: Standards for wireless computer a network includes are:
Figure: Wireless computer networks and Internet access 1. Bluetooth: Bluetooth enables a variety of devices, including cell phones, PDAs, wireless keyboards and mice, PCs, and printers, to interact wirelessly with each other within a small 30-foot (10-meter) area. Links up to 8 devices in 10-m area Useful for personal networking (PANs) and in business to transmit data from handheld devices to other transmitters 2. Wi-Fi: Wi-Fi" is a type of wireless networking protocol that allows devices to communicate without cords or cables. Wi-Fi is technically an industry term that represents a type of wireless local area network (LAN) protocol based on the 802.11 IEEE network standard. Set of standards: 802.11a, 802.11b, 802.11g, 802.11n Used for wireless LAN and wireless Internet access Weak security features 3. WiMax: wireless technology that provides wireless internet service over longer distances than standard Wi-Fi . WiMax is based on standard IEEE 802.16 technology and can provide broadband wireless access up to 30 miles . WiMax uses fixed and mobile stations to provide users with access to high-speed voice, data , and Internet connectivity . Wireless access range of 31 miles Require WiMax antennas W i - F i M a x
Chapter 12 Enhancing decision making 1 Ques: What are the different types of decisions and how does the decision-making process work? Answer: Types of Decisions: Decisions are made at all levels of the firm. Some decisions are very common and routine but exceptionally valuable. Although the value of improving any single one of these decisions may be small, improving hundreds of thousands of these small decisions adds up to a large annual value. Improving hundreds of thousands of “small” decisions adds up to large annual value for the business. There are 3 types of decisions. Decisions are classified as Structured, Semistructured, and unstructured.
. Figure: Types of Decisions 1. Unstructured: Decision maker must provide judgment, evaluation, and insight to solve problem. Example: Managing Director Make many unstructured decisions Should we enter a new market? 2. Structured: Repetitive and routine; involve definite procedure for handling so they do not have to be treated each time as new. Example: Manager Make more structured decisions but these may include unstructured components 3. Semistructured: Only part of problem has clear-cut answer provided by accepted procedure: Security, Supervisor.
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