How does OFDM work?
A. signals are broken up and the parts are sent in parallel
B. the same signal is sent on multiple channels
C. one signal is sent twice on the same channel
D. a signal is sent over a wired network at the same time as the wireless network
Answer: A
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The relation shown in Figure 15.12 describes hospitals (hospitalName) that require certain items (itemDescription), which are supplied by suppliers (supplierNo) to the hospitals (hospitalName). Furthermore, whenever a hospital (h) requires a certain item (i) and a supplier (s) supplies that item (i) and the supplier (s) already supplies at least one item to that hospital (h), then the supplier (s) will also be supplying the required item (i) to the hospital (h). In this example, assume that a description of an item (itemDescription) uniquely identifies each type of item.
(a) Describe why the relation shown in Figure 15.12 is not in 5NF.
(b) Describe and illustrate the process of normalizing the relation shown in Figure 15.12 to 5NF.
Windows includes a software firewall
Indicate whether the statement is true or false
The ____ server behavior will check the database when a user submits the form to ensure that the user name and password are valid.
A. Insert Record B. Check Data C. Log In User D. Recordset
To validate that data entered in a Web form is in a specified format, use a(n) ____________________ control.
Fill in the blank(s) with the appropriate word(s).