皮皮学，免费搜题
登录
搜题
【多选题】
After properly configuring multiple VLANs， an administrator has decided to secure its VLAN network. Which three steps are required to secure this environment？ （Choose three.）（）A.
If a port is connected to a foreign device make sure to disable CDP， DTP， RPR， PAgP， UDLP， and any other unnecessary protocols， and enable UplinkFast/BPDU guard on it.
B.
Enable root guard feature to prevent a directly or indirectly connected STP-capable device from affecting the location of the root bridge.
C.
Configure VTP domains appropriately or turn off VTP altogether to limit or prevent possible undesirable protocol interaction with regards to the network-wide VLAN configuration.
D.
Set the native VLAN ID to match the port VLAN ID of any 802.1q trunk to prevent spoofing.
E.
Disable all unused ports and place them in an unused VLAN to avoid unauthorized access.
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】喷油器的检修方法有哪些?
【单选题】王某,男,26岁。查体发现:气管向左侧移位,右侧胸廓饱满,呼吸运动减弱,语音震颤消失,叩诊呈鼓音,呼吸音消失。考虑诊断为
A.
左侧肺不张
B.
右胸腔积液
C.
右下大叶性肺炎
D.
右侧气胸
E.
右侧肺不张
【单选题】甩挂运输具有的以下特点中说法错误的选项是( )。
A.
减少装卸等待时间，提高运输效率
B.
减少车辆空驶和无效运输，降低能耗和废气排放
C.
实现货物的暂时保管功能，节省仓储设施
D.
不便于组织多式联运