How many network packets does Nmap have to send to create a remote system IP stack fingerprint? a. 1 b. 15 c. 150 d. 1500 What protocol is used to provide the functionality for Windows shared network resources (shares)? a. PPP b. SMTP c. SMB d. SNMP What is the default port Telnet uses? a. 20 b. 21 c. 23 d. 80 Why is Telnet considered to be insecure? a. Everything it transmits is in the clear. b. It uses an insecure port by default. c. Persistent vulnerabilities in the Telnet program have not been fixed. d. Telnet is a secure program.