皮皮学，免费搜题
登录
搜题
【多选题】
STP协议虽然能够解决环路问题,但是由于网络拓扑收敛慢,影响了用户通信质量。RSTP针对STP做了很多改进,如下是RSTP对STP的改进的是:A.
RSTP删除了3种端口状态，新增加了2种端口角色。
B.
RSTP的端口状态规范是根据端口是否转发用户流量和学习MAC地址来划分的，把原来的5种端口状态缩减为3种。
C.
运行RSTP的交换机按照Hello Timer规定的时间间隔发送配置BPDU，该行为完全由每台设备自主进行。
D.
如果一个端口连续4个Hello Time时间内没有收到上游设备发送过来的配置BPDU，那么该设备认为与此邻居之间的协商失败。
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
【单选题】When the domestic money prices of goods are held constant
A.
a nominal dollar appreciation makes U.S. goods cheaper compared with foreign goods.
B.
a nominal dollar depreciation makes U.S. goods less appealing in foreign markets.
C.
a nominal dollar appreciation does not affect the prices of U.S. goods.
D.
a nominal dollar depreciation makes U.S. goods more expensive compared with foreign goods.
E.
a nominal dollar depreciation makes U.S. goods cheaper compared with foreign goods and a nominal dollar appreciation makes U.S. goods more expensive compared with foreign goods.
【单选题】Mr. Smith borrows ＄500 now and pays file money hack next year when prices have doubled, then how much will he be paying back in terms of real purchasing power measured by the money value of this year?...
A.
＄500.
B.
＄250.
C.
＄1000.
D.
＄750
【单选题】When money prices are used to facilitate comparisons of value, money is said to function as
A.
unit of account.
B.
medium of exchange.
C.
store of value.
D.
payments-system ruler.
【单选题】When money prices are used to facilitate comparisons of value, money is said to function as a
A.
unit of account.
B.
medium of exchange.
C.
store of value.
D.
payments-system ruler.
相关题目：