While troubleshooting some connectivity issues，you issue the “show ip ospf database”in order to ex amine the link state database. Which three of the statements below are true regarding the OSPF link state database（）

A . The neighboring router stops receiving ACK packets from this router B . The neighboring router starts receiving route updates from this router C . The neighboring router is too busy to answer the query （generally caused by high CPUutilization） D . The neighboring router is having memory problems and cannot allocate the memory to processthe query or build the reply packet

A . View debug logs on NIM master for errors or failures. B . Boot the client machine to SMS， and view the POST Error log. C . Boot the client machine to SMS， setup remote IPL， and execute a ping test. D . Boot the client machine to diagnostics， and ping the client from the NIM master.

A . ping 192.168.1.255 B . ping with sweep option C . ping 192.168.1.127 D . ping 192.168.1.64 E . ping with broadcast optio

A . The port is experiencing errors B . The port is administratively disabled C . The port is blocked by spanning tree D . The port has an active link with normal traffic activity

A . Some query or reply packets are lost between the routers B . The neighboring router starts receiving route updates from this router C . A failure causes traffic on a link between two neighboring routers to flow in only one direction（unidirectional link） D . The neighboring router stops receiving ACK packets from this router

A . ping B . tracert C . ipconfig D . show ip route E . winipcfg F . show interfaces G . All of the above

A . The port is experiencing errors. B . The port is administratively disabled. C . The port is blocked by spanning tree. D . The port has an active link with normal traffic activity.

A . Each router has an identical link state database B . External routes are imported into a separate link state database C . Synchronization of link state databases is maintained via flooding of LSAs D . Information in the link state database is used to build a routing table by calculating a shortest-path tree E . By default， link state databases are refreshed every 10 minutes in the absence of topologychange

A .  Packet drops B .  Transmitting too many small packets C .  Variable queue delays D .  Compression E .  None of the other alternatives apply

A . Some quer y or reply packets are lost between the routers. B . The neighboring router starts receiving route updates from this router. C . A failure causes traffic on a link between two neighboring routers to flow in only one direction(unidirectional link). D . Th e neighboring router stops receiving ACK packets from this router.

A . The K-values do not match B . The hold times do not match C . The hello times do not match D . The AS numbers do not match

A . Router#copy tftp flash B . Router(config)#restore flash C . Router(config)#repair flash D . Router#copy flash run E . Router>copy start flash F . Router#copy start flash

While ATMs have added some convenience to our lives, a few risks have also popped up(发生). To stay out of trouble, you should follow these steps: Look Around Before You Approach Take a quick look at your surroundings. See if anybody or anything looks suspicious. Is anybody watching you or standing too close？ Use ATMs That You're Familiar With If you know an area well and have used an ATM before, you can expect similar results. In other words, your chances of getting robbed at a "familiar" ATM are less than your chances of getting robbed at a "new" ATM. Have Your Card Ready While Approaching the ATM If you're quick, your chances are better. On the other hand, you're exposing yourself unnecessarily if you stand around the ATM digging through your wallet or purse for that special card. Get it out before you leave your car or as you're approaching the ATM. Use ATMs That are Well Lit and Safe Only somebody with a valid card can get through the door of an ATM booth. This makes it less likely that an "undesirable(不受欢迎的)" will approach you just as your cash is coming out. Obviously this is not foolproof(十分安全的)—a crook(骗子) can steal somebody's card and use it immediately. Get Cash Out of Sight This is pretty obvious, but some people need to be more conscious. Whether it's a lot of money or a little, cash can be tempting when it's out in the open. Points to remember when using an ATM Before you come to an ATM,【46】. You'd better use a【47】ATM. Take out your【48】before leaving your car or when approaching the ATM. Because a crook can steal somebody's card and use it,【49】is not foolproof. When you want to get your cash, get it【50】.

A．upon B．up to C．out D．through

A．ones B．others C．the others D．those

<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/8cfeff82ca82832de8d38de7ecc19da4.jpg' /> <img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/197d6a90c8ee401b7f6b0bd585a993d7.jpg' /> A. one-way B. two-way C. three-way D. four-way E. no handshakes required during authentication F. None of the above

At which OSI layer is this problem associated with？ A．The data link layer B．The application layer C．The access layer D．The session layer E．The network layer

[A] called [B] calls [C] calling [D] call

A:come; B:catch; C:put; D:keep

A．took B．looked C．picked D．brushed