单项选择题
A.the summarized address for all of the internal subnetted addresses
B.the MAC address of the router used by inside hosts to connect to the Internet
C.a globally unique, private IP address assigned to a host on the inside network
D.a registered address that represents an inside host to an outside network
多项选择题 Which of the following IP addresses can be assigned to the host devices? （）
单项选择题 Which statement accurately describes a benefit provided by VTP（）。
多项选择题 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.)（）。