TCP Connect/Full Open Scan is one of the most unreliable forms of TCP scanning.

Refering to the accompanying figure, which callout points to the button that displays or hides search options?

A. A B. B C. C D. D

Which of the following statement about layers of the TCP/IP protocol stack is false?

a) Each layer provides functionality for the layers above it. b) Layers ease the development, debugging and maintenance of network applications. c) Each layer can be implemented by following one or more protocols. d) Each layer can be used independently to perform network communication.