在建立与Cisco Catalyst交换机的控制台连接的时候，根据连接的方法不同，下列（）是有效的电缆类型。

A . when a packet is received from an 802.1Q trunk，the vlan id can be determined from the source MAC address table B . unkown unicast frames are retransmitted only to the ports that belong to the same vlan C . ports between switches should be configured in access mode so that vlans can span across the ports D . broadcast and multicast frames are retransmitted to ports that are configured on different vla

A .  Catalyst 2800/E Series B .  Catalyst 3750 Series C .  Catalyst 3900/E Series D .  Catalyst 4500/E Series E .  Catalyst 6500/E Serie

A . 当从一个802.1Q中继收到一个包时，VLAN ID可以从源MAC地址表确定 B . 未知单播帧被重新传输只对属于同一VLAN的端口 C . 交换机之间的端口应该在接入模式被配置为使得VLAN可以横跨端口跨越 D . 广播和多播帧被重发到在不同的VLAN配置的端口

A .  48 Ethernet 10/100 ports B .  Fast Ethernet and Gigabit Ethernet connectivity C .  dual-purpose copper or fiber uplinks D .  standalone fixed-configuration Layer 2 switching

A . Catalyst交换机mac地址 B . 连接到交换机端口的主机的MAC地址 C . 直接相连的网络设备的IP地址 D . 网络主机的MAC地址与IP地址之间的映射关系

A .  independent of SSO B .  NSF combined with SSO enables supervisor engine load balancing C .  supported by RIPv2， OSPF， IS-IS， and EIGRP D .  supports IPv4 and IPv6 multicast E .  prevents route flapping F .  dependent on FIB table

A . show version B . show running-config C . show hostname D . show cdp neighbor

A .  1 B .  2 C .  1 to 1，005 D .  1 to 4，096 E .  no limit

A . cisco B . ciscolab C . enable D . secret

A . 成组交换式100BaseTX以太网 B . ATMOC-48 C . FDDI D . T1/E1

A . SwitchA#showmac-address-table aging-time B . SwitchA#showmac-address-table C . SwitchA#displaymac-address-table aging-time D . SwitchA#mac-address-tablea ging-time

A . no shutdown B . link-up C . switchport mode access D . no switchport mode shutdow

A . 501 to 1000 Users B . 20 to 250 Users C . More than 1000 Users D . 251 to 300 User

A . 支持100baseTX B . 网络数据的传输基于交换模式而非竞争模式 C . 分割减少冲突域 D . 支持VLAN

A . auto B . full C . half D . full-flow-control

A . when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table. B . unkown unicast frames are retransmitted only to the ports that belong to the same vlan C . ports between switches should be configured in access mode so that vlans can span across the ports D . broadcast and multicast frames are retransmitted to ports that are configured on different vlan.

A . AutoQos Enterprise B . AutoQoS Campus C . AutoQoS VoIP D . AutoQoS LAN

A .  Only the Cisco Catalyst 2960 LAN Base Series offers enhanced Layer 2+ intelligent LAN services. B .  Only the Cisco Catalyst 2960 LAN Lite Series supports Power over Ethernet. C .  Only the Cisco Catalyst 2960 LAN Base Series can be managed by Cisco Network Assistant. D .  Only the Cisco Catalyst 2960 LAN Lite Series supports Gigabit Ethernet uplink

A .  1600，7300 and 8000 Series B .  2900，3700 and 4500 Series C .  2700，7300 and 8000 Series D .  2700，3700 and 4500 Serie

A .  Cisco Catalyst 2900 Series，Catalyst 7300 Series，and Catalyst 8000 Series B .  Cisco Catalyst 2900 Series，Catalyst 3700 Series，and Catalyst Series C .  Cisco Catalyst 2700 Series，Catalyst 7300 Series，and Catalyst 8000 Series D .  Cisco Catalyst 2700 Series，Catalyst 3700 Series，and Catalyst4500 Serie

A . independent of SSO B . NSF combined with SSO enables supervisor engine load balancing C . supported by RIPv2， OSPF， IS-IS， and EIGRP D . supports IPv4 and IPv6 multicast E . prevents route flapping F . dependent on FIB table

A . 串口线没有连接正确 B . 端口速率设置错误 C . 流控设置错误 D . 交换机故障

(20) Catalyst 3500（Cisco IOS系统）中启用STP的命令格式是( )。 A) spanning-treevlan＜vlan＞ B) no spamung-tree vlan＜vlan＞ C) set spantree enable＜vlans＞ D) set spantree: disable＜vlans＞