Describe the ZigBee networking standard.
What will be an ideal response?
One networking standard designed for inexpensive and simple short-range networking (particularly sensor networks) is ZigBee (802.15). ZigBee is intended for applications that require low data transfer rates and several years of battery life. For instance, ZigBee can be used for home and commercial automation systems to connect a wide variety of devices (such as appliances and lighting, heating, and security systems). ZigBee is also used in industrial manufacturing, personal home healthcare, device tracking, telecommunications, and wireless sensor networks. ZigBee is designed to accommodate more than 65,000 devices on a single network and supports speeds up to 250 Kbps, depending on the frequency being used (several different frequencies are available for ZigBee networks). ZigBee networks have a range of 10 to 50 meters (about 33 to 164 feet) between devices, depending on power output and environmental characteristics.
You might also like to view...
Answer the following questions true (T) or false (F)
1. Machine language is the same for all CPUs. 2. A program’s instructions must be store in main memory before they can be executed. 3. Part of the operating system is typically store in ROM for faster booting.
Given the following code, find the compile error.
``` public class Test { public static void main(String[] args) { m(new GraduateStudent()); m(new Student()); m(new Person()); m(new Object()); } public static void m(Student x) { System.out.println(x.toString()); } } class GraduateStudent extends Student { } class Student extends Person { @Override public String toString() { return "Student"; } } class Person extends Object { @Override public String toString() { return "Person"; } }``` a. m(new GraduateStudent()) causes an error b. m(new Student()) causes an error c. m(new Person()) causes an error d. m(new Object()) causes an error
Forms contain form ____, such as check boxes and option buttons.
A. keys B. objects C. indices D. components
You add animated GIFs to your Web page by using the ____ element.
A.
B.