An IT suspects that an unauthorized device is connected to a wireless network. This is a result of pastry sharing on a device brought from home. What is put in place to stop such activity. 1- Media Access Control Filtering
2- Channel Overlap
3-WiFi Protected Access 2
4- collision Domain

In a compound condition, both conditions on either side of the logical operator and must be true for the overall condition to be true. a: true b: false

Which tab should you open to find the option for adding a header?

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?