单项选择题
A. Between networks B. Within routers C. Within networks D. Between WAPs
At which of the following layers does the UDP protocol ...
单项选择题At which of the following layers does the UDP protocol operate?（）
A.Layer 1 B.Layer 4 C.Layer 6 D.Layer 7
Which of the following connector types is commonly iden...
单项选择题Which of the following connector types is commonly identified by two rows of pins with four in onerow and five in the other?（）
A.DB-9 B.RJ-45 C.SC D.BNC
Switch A is configured with VLAN 105 and 106. Switch Bi...
单项选择题Switch A is configured with VLAN 105 and 106. Switch Bis configured with VLAN 105 and 107.Both switches are connected with a fiber cable. In order for packets from all VLANs to cross thefiber cable, which of the following configurations MUST be present? （）
A. Reverse ARP B. Full duplex on the fiber link C. PoE D. 802.1q trunking
