单项选择题
A. 2031:0:130F::9C0:876A:130B B. 2001:0DB8:0000:130F:0000:0000:08GC:140B C. 2001:0DB8:0:130H::87C:140B D. 2031::130F::9C0:876A:130B
Which of the following protocols uses both TCP and UDP ...
单项选择题Which of the following protocols uses both TCP and UDP ports?（）
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
