多项选择题
A. reduces routing table entries
B. auto-negotiation of media rates
C. efficient utilization of MAC addresses
D. dedicated communications between devices
E. ease of management and trouble shooting
多项选择题 Which two tasks does the Dynamic Host Configuration Protocol perform?（）
多项选择题 Which three statements are typical characteristics of VLAN arrangements?（）
多项选择题 A network administrator changes the configuration register to 0x2142 and reboots the router. What are two results of making this change?（）