A.过长的Max Age会导致链路故障不能被及时发现
B.过短的Max Age会导致链路故障不能被及时发现
C.过长的Max Age会导致频繁的生成树计算
D.过短的Max Age会导致频繁的生成树计算
第1题:
此题为判断题(对,错)。
第2题:
A.过长Forward Delay的会导致生成树收敛太慢
B.过短的Forward Delay会导致生成树收敛太慢
C.过长的Forward Delay会导致暂时环路引入
D.过短的Forward Delay会导致暂时环路引入
第3题:
A.Max Age默认为200秒,如果Message Age达到Max Age,则此配置BPDU被认为已经过期
B.Hello Time默认为30秒,也即在指定端口上,配置BPDU每隔30秒发送一次
C.Forward Delay默认为15秒
D.Message Age是配置BPDU在网络中传播的生存期,随时间增长而变大
第4题:
●设员工关系Emp(E_no,E_name,E_sex,D_name,E_age,E_Add),关系Emp中的属性分别表示员工的员工号、姓名、性别、所在部门、年龄和通信地址;其中D_name是部门关系Dept的主键。查询各个部门员工的最大年龄、最小年龄,以及最大年龄与最小年龄之间年龄差的SQL语句如下:
SELECT D_name, MAX(E_age),MIN(E_age), (61)
FROM Emp
(62),
(61) A. MAX(E_age)-MIN(E_age)IN 年龄差
B.年龄差IN MAX(E_age)-MIN(E_age)
C.MAX(E_age)-MIN(E_age)AS 年龄差
D.年龄差AS MAX(E_age)-MIN(E_age)
(62) A. GROUPBYE_name
B. GROUP BYD_name
C. ORDER BY E_name
D. ORDER BYD_name
第5题:
How are STP timers and state transitions affected when a topology change occurs in an STP environment?()
第6题:
下列SQL语句中,能够完成求某列最大值的是()。
第7题:
在STP中,关于端口的HelloTime说法错误的是()
第8题:
Which three statements about STP timers are true?()
第9题:
Hello Time
Forward Delay
Max Age
Message Age
第10题:
All ports will temporarily transition to the learning state for a period equal to the max age timer plus the forward delay interval.
All ports will transition temporarily to the learning state for a period equal to the forward delay interval.
The default aging time for MAC address entries will be reduced for a period of the max age timer plus the forward delay interval.
The default hello time for configuration BDPUs will be reduced for the period of the max age timer.
第11题:
The hello time is 5 seconds.
The forward delay is 10 seconds.
The hello time is 2 seconds.
The forward delay is 15 seconds
The max_age timer is 15 seconds.
The hello time is 10 seconds.
The max_age timer is 20 seconds.
The forward delay is 20 seconds.
The max_age timer is 30 seconds.
第12题:
Hello Time
Forward Delay
Max Age
Message Age
第13题:
A.较长的Hello Time可以降低生成树计算的消耗
B.过长的Hello Time会导致对链路故障的反应迟缓
C.较长的Hello Time可以增强生成树的健壮性
D.过短的Hello Time会加重CPU和网络负担
第14题:
A.较长的HelloTime可以降低生成树计算的消耗,因为网桥可以不那么频繁的发送配置消息
B.较短的HelloTime可以在丢包率较高的时候,增强生成树的健壮性,避免因为丢包而误认为链路故障
C.过长的HelloTime会导致因为链路丢包而使网桥认为链路故障,开始生成树重新计算
D.HelloTime配置的越短越好
第15题:
A.Hello Time
B.Forward Delay
C.Max Age
D.Message Age
第16题:
下列SQL语句中,能够完成求某列最大值的是()。
ASELECT AVG(Age) FROM Student
BSELECT MAX(Age) FROM Student
CSELECT MIN(Age) FROM Student
DSELECT COUNT(*) FROM Student
第17题:
You work as a network technician at. Your boss, Mrs. , is interested in the Spanning Tree Protocol timers. What can you tell her regarding the default STP timers? ()
第18题:
生成树协议在检测链路故障时,会采用三个时间间隔。下面四个生成树协议使用的时间间隔中与生成树链路故障的检测无关的是?()
第19题:
生成树协议在处理链路故障时,为了防止临时回路产生,采用了()定时器.
第20题:
SELECT AVG(Age) FROM Student
SELECT MAX(Age) FROM Student
SELECT MIN(Age) FROM Student
SELECT COUNT(*) FROM Student
第21题:
较长的HelloTime可以降低生成树计算的消耗,因为网桥可以不那么频繁的发送配置消息
较短的HelloTime可以在丢包率较高的时候,增强生成树的健壮性,避免因为丢包而误认为链路故障
过长的HelloTime会导致因为链路丢包而使网桥认为链路故障,开始生成树重新计算
HelloTime配置的越短越好
第22题:
STP timers values (hello, forward delay, max age) are included in each BPDU.
A switch is not concerned about its local configuration of the STP timers values. It will only consider the value of the STP timers contained in the BPDU it is receiving.
To successfully exchange BPDUs between two switches, their STP timers value (hello, forward delay, max age) must be the same.
If any STP timer value (hello, forward delay, max age) needs to be changed, it should at least be changed on the root bridge and backup root bridge.
On a switched network with a small network diameter, the STP hello timer can be tuned to a lower value to decrease the load on the switch CPU.
The root bridge passes the timer information in BPDUs to all routers in the Layer 3 configuration.
第23题:
Hello Time
Forward Delay
Max Age
Message Age