8253的各个通道都为16位计数器，若要求计数值为最大，必须输入的计数初值为（） FFFFH。 0000H。 0001H。 1000H。
The network administrator is trying to add Switch1 to the network， but the 802.1Q trunk is not coming up. Switch1 was previously tested in the laboratory and its trunk configuration worked fine. What are three possible causes of this problem？（） The trunking configuration mode on Switch1 is set to Off.。 The trunking configuration mode on the other end is set to On.。 The trunking configuration mode on the other end is set to Desirable.。 Cisco Discovery Protocol is not running on the other end.。 There is a VTP domain name mismatch.。 Switch1 does not support 802.1Q.。
旋流器是利用离心力分选末煤的设备，旋流器工作时，其轴心必须形成空气柱，底流必需以辐射（）排出。 伞状。 柱状。 无规则形状。
爆震
Which three of these statements about Dynamic Trunking Protocol are correct？（） It supports autonegotiation for both ISL and IEEE 802.1Q trunks.。 It must be disabled on an interface if you do not want the interface to work as a trunk or start negotiation to become a trunk.。 It is a point-to-multipoint protocol.。 It is a point-to-point protocol.。 It is not supported on private VLAN ports or tunneling ports.。
1850 TSS－320的能支持的最大10GE端口的数量为（）
