1. What is the primary function of a firewall in network security? - A) To serve web pages - B) To filter incoming and outgoing traffic - C) To provide a user interface for network resources - D) To increase the network speed Answer: B) To filter incoming and outgoing traffic Rationale: A firewall is designed to prevent unauthorized access to or from a private network by filtering the incoming and outgoing traffic based on an applied rule set. 2. Which protocol is used to securely transmit files over a network? - A) FTP - B) HTTP - C) SFTP - D) SMTP Answer: C) SFTP Rationale: Secure Fil

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