The technician is working on a DNS problem. Which of the following software tool is the technician MOST likely to use to troubleshoot this issue?

Why must you use the use this sequence of statements when removing a node from a linked implementation of an ADT List?

curPtr->setNext( nullptr ); delete curPtr; curPtr = nullptr ;

Which of the following is not true of system penetration?

a) Every system penetration is potentially dangerous. b) It is a successful breach of a system’s security. c) It leads to denial of service. d) Many attacks rely on a successful system penetration.