新版CCNA 640-802例题分析
Refer to the exhibit. Which two statements about the configuration of the switch interface are correct? (Choose two) A.The switchport belongs only to VLAN 2
B.By default, all switch ports are members of VLAN 1005 C.Interface fa0/0 will be in both VLAN 1 (by default) and VLAN 2 D.The exhibit shows interface fa0/0 to be dynamically mapped to VLAN 2 E.A network host can be connected to this interface.
该题的答案为多选。仔细看给出的条件： SwitchA(config)#interface fa0/0
SwitchA(config-if)#switchport access vlan 2
应用该命令后，fa0/0即成为VLAN 2的成员。而在未指定fa0/0属于哪个VLAN前，该接口默认是属于VLAN1的。 该题选择A和C（此答案是错误的！）
至于为什么在这里选择选项C，可以看一下C中有两个足以让人混淆判断的单词： 一个是both 一个是by default
Interface fa0/0 will be in both VLAN 1 (by default) and VLAN 2
如果仅仅看到by default的话，大家会觉得很有道理，当然，兜兜也不例外哦，哈哈。当时也是判断失误。草率的得到了结论。by default给人的感觉就是，默认未做配置的情况下Interfac属于VLAN1，而在配置过switchport access vlan 2后，那么该接口就属于VLAN2。 正确答案为：A 和E