"matthew captures traffic on his network and notices connections using ports 20, 22, 23, and 80. which port normally hosts a protocol that uses secure, ncrypted connection
a. 20
b. 22
c. 23
d. 80 "

An endless cycle of creation and response on the internet is called

1)consider the following code snippet: #ifndef book_h#define book_hconst double max_cost = 1000.0; class book{public: book(); book(double new_cost); void set_cost(double new_cost); double get_cost() const; private: double cost; }; double calculate_terms(book bk); #endifwhich of the following is correct? a)the header file is correct as given.b)the definition of max_cost should be removed since header files should not contain constants.c)the definition of book should be removed since header files should not contain class definitions.d)the body of the calculate_terms function should be added to the header file.

What part of the interface displays the external references contained in a selected cell? the status bar the review tab the scroll bar the formula bar