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After a recent security breach, a security analyst reports that several administrative usernames and passwords are being sent via cleartext across the network to access network devices over port 23. Which of the following should be implemented so all credentials sent over the network are encrypted when remotely accessing and configuring network devices?
Correct Answer: A
Port 23 (Telnet) and Port 22 (SSH) are network protocols used to remotely access and manage systems however telnet does not encrypt the connection so captured traffic appears in cleartext whereas an ssh connection would be encrypted. SNMP (Simple Network Management Protocol) - is a protocol for collecting and organizing information about managed devices on networks. Devices that typically support SNMP include servers/desktops, routers, switches, etc. SFTP (Secure File Transfer Protocol) is a secure file transfer protocol that uses SSH encryption to securely sending and receiving file transfers. FTP (File Transfer Protocol) - For file transfers.