If the root bridge fails， configuration BPDUs will no longer be sent. Which STP timer will have toexpire before the other switches can actively restore connectivity with topology change procedureof STP？（）A、hello timerB、BPDU timerC、Forward_delay timerD、Max_age timerE、Dead timerF、Wait timer
If the root bridge fails， configuration BPDUs will no longer be sent. Which STP timer will have toexpire before the other switches can actively restore connectivity with topology change procedureof STP？（）
- A、hello timer
- B、BPDU timer
- C、Forward_delay timer
- D、Max_age timer
- E、Dead timer
- F、Wait timer
相关考题：
如果子域的相对名字是CHILDREN，父域的名字是ROOT.COM，那么子域的可辨别的域名是什么:()A.ROOT.COMB.CHILDRENC.CHILDREN.ROOT.COMD.ROOT.COM.CHILDREN
Catalyst 6500 (Catalyst OS系统)中设置主root的命令格式是______。A.spanning－tree lan r Catalyst 6500 (Catalyst OS系统)中设置主root的命令格式是______。A．spanning-tree lan ＜vans＞ root primaryB．spanning-tree lan ＜vans＞ root secondaryC．set spantree root ＜vans＞D．set spantree root secondary ＜vans＞
●下面Linux命令中， (62)可用于关闭系统。(62)A. [root@root]#init 0B. [root@root]# init 1C.[root@root]# init 2D. [root@root]#init 3
●在Linux中，可以使用命令(63)来给test文件赋予执行权限。(63)A. [root@root]#chmod -x testB. [root@root]#chmod +x testC. [root@root]#chmod -w testD. [root@root]#chmod +w test
P=201397095{C=-{AV=ROOT{M{TS{root/maxNumberOfContexts=1024,root/maxTerminationsPerContext=2,root/normalMGExecutionTime=10000,root/normalMGCExecutionTime=10000,root/MGProvisionalResponseTimerValue=30000,root/MGCProvisionalResponseTimerValue=30000}}}}}通过以上消息你可以知道lgw目前最大关联数为多少？（）A、2B、512C、30000D、1024
What is the STP root guard feature designed to prevent？（）A、a root port being transitioned to the blocking stateB、a port being assigned as a root portC、a port being assigned as an alternate portD、a root port being transitioned to the forwarding state
Which of the following commands can be used to gain root privileges and profile without initially logging in as root?（）A、 su B、 su root C、 su - root D、 su -c "root"
SOA记录中要指定管理员邮箱地址root@mail.tlinuxpro.com.cn，以下哪种格式是正确的？（）A、root@tlinuxpro.com.cnB、root.mail.tlinuxpro.com.cnC、root_mail.tlinuxpro.com.cnD、root-mail.tlinuxpro.com.cn
Which of the following characteristics describe the Root Guard feature？（Choose all that apply.）（）A、The port must be put into forwarding state manually after root-inconsistent state has beencorrectedB、A Root Guard port receiving superior BPDU goes into a root-inconsistent stateC、A Root Guard port receiving inferior BPDU goes into a root-inconsistent stateD、While the port is in a root-inconsistent state no user data is sent across that portE、The port returns to a forwarding state if inferior BPDUs stopF、It should be applied to all switch ports
Which three options are considered in the spanning-tree decision process？（）A、lowest root bridge IDB、lowest path cost to root bridgeC、lowest sender bridge IDD、highest port IDE、highest root bridge IDF、highest path cost to root bridge
As a network administrator， can you tell me what the root guard feature provides in a bridgednetwork？（）A、It ensures that BPDUs sent by the root bridge are forwarded in a timely mannerB、It enforces the root bridge placement in the networkC、It ensures that all ports receiving BPDUs from the root bridge are in the forwarding state.D、It ensures that the bridge is elected as root bridge in the network.
A non-root user can run rsh commands from serverA to serverB， but attempts to run rsh commands by the root user return with a permission error message. What action will resolve the problem？（）A、Add root user to the /etc/hosts.equiv on serverB .B、Create $HOME/.rhosts file for the root user on serverB .C、Restart the rshd daemon with root enabled option on serverB .D、Add entry to allow root user from serverA to the /etc/hosts.allow on serverB .
修改MySQL用户root的密码的指令是（）。A、mysqladmin -u root password testB、mysql -u root password testC、mysql -u root -p testD、mysql -u root -password test
You load an XmlDocument named doc with the following XML. World Atlas Dictionary You need to use an XPath query string to select the two book nodes. Which code segment should you use? （）A、XmlElement root = doc.DocumentElement;XmlNodeList nodes = root.SelectNodes(“.”);B、XmlElement root = doc.DocumentElement;XmlNodeList nodes = root.SelectNodes(“book”);C、XmlElement root = doc.DocumentElement;XmlNodeList nodes = root.SelectNodes(“bookstore//book”);D、XmlElement root = doc.DocumentElement;XmlNodeList nodes = root.SelectNodes(“books/book”);
单选题As a network administrator， can you tell me what the root guard feature provides in a bridgednetwork？（）AIt ensures that BPDUs sent by the root bridge are forwarded in a timely mannerBIt enforces the root bridge placement in the networkCIt ensures that all ports receiving BPDUs from the root bridge are in the forwarding state.DIt ensures that the bridge is elected as root bridge in the network.
多选题Which three options are considered in the spanning-tree decision process？（）Alowest root bridge IDBlowest path cost to root bridgeClowest sender bridge IDDhighest port IDEhighest root bridge IDFhighest path cost to root bridge
单选题溴的乙酸-乙酸钠溶液和碘代甲烷反应的反应式为（）。ACH3I+Br→CH3Br+IBCH3I+Br2→CHBr+ICC2H5I+Br2→C2H5Br+IBrDCH3I+Br2→CH3Br+IBr
单选题What is the STP root guard feature designed to prevent？（）Aa root port being transitioned to the blocking stateBa port being assigned as a root portCa port being assigned as an alternate portDa root port being transitioned to the forwarding state
单选题Which of the following settings will reduce packet overhead and overall latency in a standalonepoint-to-point bridge deployment？（）Aenable concatenation on the non-root bridge onlyBenable concatenation on the root bridge onlyCenable concatenation on both the root bridge and non-root bridgeDenable concatenation on the root bridge and set it as desirable on the non-root bridgeEset concatenation as desirable on the root bridge and enable it on the non-root bridge
单选题You load an XmlDocument named doc with the following XML. World Atlas Dictionary You need to use an XPath query string to select the two book nodes. Which code segment should you use? （）ADim root As XmlElement = doc.DocumentElementDim nodes As XmlNodeList = root.SelectNodes(.)BDim root As XmlElement = doc.DocumentElementDim nodes As XmlNodeList = root.SelectNodes(book)CDim root As XmlElement = doc.DocumentElementDim nodes As XmlNodeList = root.SelectNodes(bookstore//book)DDim root As XmlElement = doc.DocumentElementDim nodes As XmlNodeList = root.SelectNodes(books/book)
单选题Which of the following commands can be used to gain root privileges and profile without initially logging in as root?（）A su B su root C su - root D su -c root
单选题Which of the following settings will reduce packet overhead and overall latency in a standalone point-to-point bridge deployment？（）Aenable concatenation on the non-root bridge onlyBenable concatenation on the root bridge onlyCenable concatenation on both the root bridge and non-root bridgeDenable concatenation on the root bridge and set it as desirable on the non-root bridgeEset concatenation as desirable on the root bridge and enable it on the non-root bridge
单选题查看root用户的cron计时器设置的命令是（）。Acrontab-u root -lBcrontab -lCcrontab -u root -eDcrontab -u root -r
多选题Which of the following characteristics describe the Root Guard feature？（Choose all that apply.）（）AThe port must be put into forwarding state manually after root-inconsistent state has beencorrectedBA Root Guard port receiving superior BPDU goes into a root-inconsistent stateCA Root Guard port receiving inferior BPDU goes into a root-inconsistent stateDWhile the port is in a root-inconsistent state no user data is sent across that portEThe port returns to a forwarding state if inferior BPDUs stopFIt should be applied to all switch ports