The ____ authentication type is used for clients who access RAS through special devices such as smart cards, token cards, and others that use certificate authentication.

Assume that the support threshold is equal to 30%.

Given the lattice structure shown in Figure 6.4 and the transactions given in Table 6.3, label each node with the following letter(s): • M if the node is a maximal frequent itemset, • C if it is a closed frequent itemset, • N if it is frequent but neither maximal nor closed, and • I if it is infrequent.

Concatenation can be used with other types besides String.

Answer the following statement true (T) or false (F)