单项选择题
What is valid reason for a switch to deny port access to new devices when port security is enabled?（）
A. The denied MAC addresses have already been learned or confgured on another secure interface in the same VLAN.
B. The denied MAC address are statically configured on the port.
C. The minimum MAC threshold has been reached.
D. The absolute aging times for the denied MAC addresses have expired.
相关考题
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单项选择题
What is the purpose using the traceroute command?（）
A. to map all the devices on a network.
B. to display the current TCP/IP configuration values.
C. to see how a device MAC address is mapped to its IP address.
D. to see the path a packet will take when traveling to a specified destination.
E. to display the MTU values for each router in a specified network path from source to a destination. -
单项选择题
Which type of attack is characterized by flood of packet that requesing a TCP connection to a server?（）
A. denial of service
B. brute force
C. reconnaissance
D. Trojan horse -
单项选择题
What is the default routing update period for RIPv2?（）
A. 15 seconds
B. 30 seconds
C. 180 seconds
D. 240 seconds
