» CCNA – TCP/IP Model & Operation

EnsurepassQuestion 1 An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL? (Choose three) A. FTP B. Telnet C. SMTP D. DNS E. HTTP F. POP3   Answer: D E F Explanation The access list denies packet entry for TCP & UDP -> all the services on ports 21, 23 and 25 are disabled. Services on these ports are FTP (port 21), Telnet (port 23), SMTP (port 25). Read more […]

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