CCNA 4 Final Exam V4.0 Answers (July 2012)
1. An administrator is unable to receive e-mail. While troubleshooting the problem, the administrator is able to ping the local mail server IP address successfully from a remote network and can successfully resolve the mail server name to an IP address via the use of the nslookup command. At what OSI layer is the problem most likely to be found?
physical layer
data link layer
network layer
application layer
2. When implementing a dynamic ACL, why is it necessary to include an extended ACL as part of the configuration process?
to disable the router vty lines
to reduce the dynamic ACL filtering load
to override any previous ACL that might be applied to the router
to provide a controlled situation of allowing traffic through a router