单项选择题
A. SMTP B. Telnet C. FTP D. DNS
Which command enhances the 802.1D convergence time on p...
单项选择题Which command enhances the 802.1D convergence time on ports that are connected to hosts?（）
A. spanning-tree backbonefast B. spanning-tree uplinkfast C. spanning-tree portfast D. spanning-tree cost512
Which IEEE standard protocol is initiated as a result o...
单项选择题Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch over FastEthernet?（）
A. 802.3ad B. 802.1w C. 802.1Q D. 802.1d
Which command helps a network administrator to manage m...
单项选择题Which command helps a network administrator to manage memory by displaying flash memory and NVRAM utilization?（）
A. show secure B. show file systems C. show flash D. show version
