final2

综合英语教程2第三版答案综合英语教程2第三版答案【篇一：全新版大学英语综合教程第二版第三册课后习题答案】t onechanges in the way we livetext acontent questions ( p10 )1. write and live on a farm.2. because they grow nearly all of their fruits and vegetables. they have enough eggs, honey and wood. they are very close to nature and can enjoy the beautiful scenery. besides, they can go skiing and skating in winter.3. no. sometimes the good life can get pretty tough.4. they were buried under five feet of snow from december through march.5. when the first spring came, it brought two floods. the second flood refers to the good harvest in the growing season.6. he decided to quit his job and start to freelance.7. he has to crawl into black bear dens for “sports illustrated”, hitch up dogsled racing teams for “smithsonian” magazine, check out the lake champlain “monster” for “science digest”, and canoe through the boundary waters wilderness area of minnesota for “destinations”.8. as for insurance, they have only bought a poor man’s major-medical policy and the policy on their two cars.9. they cut back their expenses without appreciably lowering their standard of living. for example, they patronize local restaurants instead of more expensive places in the city. they still attend the opera and ballet but only a few times a year. they eat less meat, drink cheaper wine and see fewer movies.10. a tolerance for solitude and lots of energy.11. they will leave with a feeling of sorrow but also with a sense of pride at what they have been able to accomplish.12. they chose to live in the country because they want to improve the quality of their lives. yes, they have finally realized their dreams.text organization ( p11 )part one (paragraphs 1—3) the writer views his life in the country as a self-reliant and satisfyingone.part two(paragraphs 4—7 ) life in the country is good yet sometimes very hard.part three (paragraphs 8—11) after quitting his job, the writer’s income was reduced, but he andhis family were able to manage to get by.part four (paragraphs 12—15 ) a tolerance for solitude and a lot of energy have made it possiblefor the family to enjoy their life in the country.happy moments and events1) growing nearly all their fruits and vegetables2) canoeing, picnicking, long bicycle rides, etc.3) keeping warm inside the house in winter4) writing freelance articles5) earning enough money while maintaining a happy family life hardships1) working hard both in winter and in summer2) harsh environment and weather condition3) anxious moments after the writer quit his job4) cutting back on daily expenses5) solitudevocabulary1. fill in the gaps with words or phrases given in the box.( p15 )1) on balance 2) resist 3) haul 4) wicked5) illustrated6) budget 7) lowering 8) boundary9) involved10)economic 11) blasting 12) just about2. now use the verb in brackets to form an appropriate phrasal verb you have learned and complete the sentence with it.( p16 )1) cut back / down 2）pick up3）get by 4) get through5）face up to 6）turn in7）making up for8）think up3. rewrite each sentence with the word or phrase in brackets, keeping the same meaning. （p17 ）1) pursued his mathematical studies and taught himself astronomy.2) often generate misleading thoughts.3) attach great importance to combining theory with practice in our work.4) be suspected of doing everything for money.5) before he gets through life.4. complete the sentences, using the words or phrases in brackets ( p17 )1. their indoor a profit to invest in2. devicethe improvement on a global scale3. stacked temptationnever dined outconfusable use ( p18 )1. house2. home3. home family4. household1. doubt2. suspected3. doubted4. suspected5. suspectword formation ( p19 )1) rise2) final 3) regular 4) cash5) hows and whys6) upped 7) yellowed 8) bottled 9) lower 10) searchclozea decade ago, nancy did what so many americans dream about. she quit an executive position and opened a household device store in her neighborhood. people like nancy made the decision primarily for the improvement in the quality of their lives.but, to run a business on a small scale is by no means an easy job. without her steady income, nancy had to cut back on her daily expenses. sometimes she did not even have the money to pay the premiums for the various kinds of insurance she needed.fortunately, through her own hard work, she has now got through the most difficult time. she is determined to continue pursuing her vision of a better life.text b1. choose the best answer for each of the following. ( p27 ) 1—6.a c d b a ctranslate into chinese the underlined sentences in the essay ( p28 )1. 什么？你说那听起来不像你府上的生活？其实，不仅仅是你一个人这么想。

第一章习题答案一、简答题1．Java语言有哪些特点？主要用于能够哪些方面的软件开发？特点：（1）面向对象，（2）平台无关性，（3）分布式，（4）可靠性和安全性，（5）多线程，（6）简单性，（7）健壮性，（8）高性能，（9）灵活性。

适用范围：（1）所有面向对象的应用开发，包括面向对象的事件描述、处理、综合等。

（2）计算过程的可视化、可操作化的软件的开发。

（3）动态画面的设计，包括图形图象的调用。

（4）交互操作的设计。

（5）Internet 的系统管理功能模块的设计，包括 Web 页面的动态设计、管理和交互操作设计等。

（6）Intranet上的软件开发（直接面向企业内部用户的软件）。

（7）与各类数据库连接查询的 SQL 语句实现。

（8）网络通信与移动通信，网络集成方面。

2．Java程序分为哪两类？各有什么特点？如何区分它们？Java语言程序分为两类：应用程序Application和小程序Applet，它们是利用Java语言生成的可运行代码中最常用的两种，两者都必须在Java虚拟机上运行。

Application更象我们平常用VB，VC等编写的桌面程序，多以控制台（CONSOLE）方式运行，当然也很容易实现窗口应用。

Applet则需要嵌入Web页面中，在支持Java虚拟机的浏览器上运行。

区分办法：应用程序Application中一定包括一个主方法main，而小程序Applet没有这个方法。

3．简述Java程序的运行过程。

一个Java源的运行需要经过三个步骤：（1）编辑源程序，产生.Java的源程序文件（2）运用Java虚拟机JVM将源文件编译为.class的字节码文件（3）根据程序的不同类型运行程序。

对于应用程序直接调用运行命令执行字节码文件，而对于小程序Applet，需要先将字节码文件嵌入HTML文件，然后用浏览器软件打开HTML文件。

4．什么是Java虚拟机？简述其工作机制。

Java虚拟机（Java Virtual Machine—JVM）是一种利用软件方法实现硬件功能的抽象化的计算机，它基于下层的操作系统和硬件平台，可以在上面执行Java的字节码程序。

CCNA第二学期《Final Examinnation》英文A卷1 What are two functions of a router? (Choose two.)It forwards data packets toward their destination.It forwards the packet to the destination if the TTL value is 0.It changes the destination IP address of data packets before forwarding them to an exit interface.It determines the best path based on the destination MAC address.It acts as an intersection between multiple IP networks.2 Which router component contains a scaled-down version of the IOS that can be used to reload a complete version of the IOS in the event that the IOS becomes damaged or corrupted?ROMFlashSDRAMNVRAM3 Using default settings, what is the next step in the router boot sequence after the IOS loads from flash? Perform the POST routine.Search for a backup IOS in ROM.Load the bootstrap program from ROM.Load the running-config file from RAM.Locate and load the startup-config file from NVRAM.4Refer to the exhibit. How many routes are ultimate routes?34575ADCABCIt will load balance the traffic between ADC and ABCIt will send the traffic via ABC, and will use ADC as a backup path only when ABC fails.6Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices are properly configured and the destination network is advertised by both protocols.Which path will be used to transmit the data packets from PC1 to PC2?The packets will travel via R2-R1.The packets will travel via R2-R3.The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3.The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path.Refer to the exhibit. The network is configured for OSPF routing with default settings. The bandwidths have been configured correctly for each link. If the T1 link between router A and router E fails, what path will a packet from router A take to reach the LAN attached to router F when the network has converged?A, B, C, FA, B, C, E, FA, D, G, E, FA, D, G, H, F8 In a lab test environment, a router has learned about network 172.16.1.0 through four different dynamic routing processes. Which route will be used to reach this network?D 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0R 172.16.1.0/24 [120/1] via 192.168.200.1, 00:00:17, Serial0/0/0I 172.16.1.0/24 [100/1192] via 192.168.200.1, 00:00:09, Serial0/0/09 Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network.Routers in a multipoint network that run a link-state protocol can exchange routing tables.Routers use only hop count for routing decisions.The shortest path first algorithm is used.Split horizon is used to avoid routing loops.10with static routeswith a routed protocolwith a routing protocolwith directly connected routes11Refer to the exhibit. What is the meaning of the highlighted value 120?It is the metric that is calculated by the routing protocol.It is the value that is used by the DUAL algorithm to determine the bandwidth for the link.It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.12 Which statement is true about the metrics used by routing protocols?A metric is a value used by a particular routing protocol to compare paths to remote networks.A common metric is used by all routing protocols.The metric with the highest value is installed in the routing table.The router may use only one parameter at a time to calculate the metric.13 Which routing protocol by default uses bandwidth and delay to calculate the metric of a route? RIPv1RIPv2OSPFEIGRP14 Which three routing metrics are correctly defined? (Choose three.)delay - the link speedreliability - the error rate on a linkload - the amount of traffic on a linkcost - the value to indicate preference for a routehop count - the path selected with the highest bandwidthbandwidth - the amount of time it takes a packet to travel a link15 Which two statements about routing protocols are accurate? (Choose two.)OSPF supports VLSM.RIPv1 supports VLSM.RIPv2 does not have a hop count limit.EIGRP supports discontiguous network designs.16Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)a CSU/DSU devicea modeman Ethernet switcha huba bridge17 When connecting two devices, which situation would normally require the use of a crossover cable? connecting a host to a switchconnecting a switch to a routerconnecting a switch to a switchconnecting a host to a router console port18Refer to the exhibit. A network administrator has run the show interface command. The output of this command is displayed. What is the first step that is required to make this interface operational?Switch the cable with a known working cable.Issue the no shutdown command on the interface.Configure the interface as a loopback interface.Set the encapsulation for the interface.19 Which port should a terminal emulator be connected to in order to access a router without network connectivity?T1serialconsoleFastEthernet20 Which router mode is accessed by entering the enable command?user EXECprivileged EXECglobal configurationinterface configuration21Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway?10.1.1.110.1.1.2172.16.1.122Refer to the exhibit. The show cdp neighbors command was run on one of the devices as shown. Based on this information, which two facts can be determined? (Choose two.)The command was run on the router.ABCD is a non- CISCO device.Layer 3 connectivity between two devices exists.ABCD supports routing capability.ABCD is connected to the Fa0/0 interface of the neighboring device.23Refer to the exhibit. Which statement is true about the Ethernet interfaces shown in the network?A frame leaves interface Fa0/0 of R1 with the source MAC address as 000C.3010.9260.A packet will not be forwarded between R1 and R2 until the no shutdown command is issued on the Fa0/0 interface of R1.24Refer to the exhibit. Which solution provides the most efficient use of router resources for forwarding traffic between BR and HQ?RIPRIPv2EIGRPstatic routes25Refer to the exhibit. Pings are failing between HostA and HostB. The network administrator discovers that Router1 does not have a route to the 172.16.0.0 network. Assuming Router2 is configured correctly, which two static routes could be configured on Router1 to enable Host A to reach network 172.16.0.0? (Choose two.)ip route 172.16.0.0 255.255.0.0 S0/0ip route 172.16.0.0 255.255.0.0 S0/1ip route 172.16.0.0 255.255.0.0 192.168.0.1ip route 192.168.0.1 172.16.0.0 255.255.0.0 S0/0ip route 192.168.0.1 172.16.0.0 255.255.0.0 S0/126Refer to the exhibit. How was the OSPF default gateway entry for R2 determined?Default routes are automatically injected by OSPF into all advertisements.A static default gateway route is defined in the configuration of R2.The default-information originate command is applied on R1.The ISP defines the gateway of last resort and automatically passes it to R1 and R2.The ip default-gateway command is applied on R2.27Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will be listed in the R2 routing table?答案：D28192.168.2.1192.135.250.129 Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a static route entry be altered to accommodate a topology change?Keep the existing static route and configure a new static route with the correct next hop IP address.Negate the existing static route and configure a new static route with the correct next hop IP address.Do nothing. The existing static route will automatically update the next hop entry with the new IP address. Keep the existing static route, reload the router, and configure a new static route with the correct next hop IP address.30Refer to the exhibit. The entire 192.168.1.0 network has been allocated to address hosts in the diagram. Utilizing VLSM with contiguous address blocks, which set of addresses and prefixes could be used to create an addressing solution with a minimum waste of IP addresses?答案：D31Refer to the exhibit. Which host has a combination of IP address and subnet mask on the same network as Fa0/0 of Router1?host Ahost Bhost Chost D32Refer to the exhibit. If the EIGRP routing protocol is used throughout the network, which IP address and mask prefix should be sent by router R1 to the Edge router as a result of manual summarization of LANs A, B, C, and D?33Refer to the exhibit. Routers RTRA and RTRB are running OSPF. What entry does RTRA add in the routing table when Serial 0/0/0 receives an update about the network that is attached to RTRB?O 172.16.7.0/30 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0O 172.16.7.16/28 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0O 172.16.7.0/24 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0O 172.16.0.0/16 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/034Refer to the exhibit. If RIPv1 is used as the routing protocol throughout the network, what RIPv1 route will router R1 advertise to router R3?10.1.0.010.1.1.010.1.2.035 Which statement correctly describes a feature of RIP?RIP is a link-state routing protocol.RIP uses only one metric—hop count— for path selection.Advertised routes with hop counts greater than 10 are unreachable.Messages are broadcast every 10 seconds.36Refer to the exhibit. The network is using the RIPv2 routing protocol. If network 10.0.0.0 goes down, what mechanism will prevent Router1 from advertising false routing information back to Router2?triggered updatespoison reverseholddown timerssplit horizonroute poisoningsplit horizonhold-down timertriggered updates38Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statements are true? (Choose three.)The missing information for Blank 1 is the command show ip route.The missing information for Blank 1 is the command debug ip route.The missing information for Blank 2 is the number 100.The missing information for Blank 2 is the number 120.The missing information for Blank 3 is the letter R.The missing information for Blank 3 is the letter C.39Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly configured and operational. Both routers are configured to include all connected interfaces in routing updates. R2 is not showing any routes from R1 in the routing table. What is the likely cause?The adjacent interfaces are passive.The distance of 120 exceeds 15 hops.R2 will not accept version 1 updates from R1.Routes are being summarized by R1 but not by R2.40Refer to the exhibit. All routers are configured to use the EIGRP routing protocol with defaultIt will travel via A, B, and C.It will travel via A, F, E, D, and C.It will travel via A, G, H, and C.41 Which multicast address does EIGRP use to send hello and updates packets?224.0.0.5224.0.0.6224.0.0.942 A router has EIGRP configured as the only routing protocol. In what way might EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?It broadcasts hello packets to all routers in the network to re-establish neighbor adjacencies.It sends queries to adjacent neighbors until a new successor route is found.It immediately sends its entire routing table to its neighbors.It will set the metric for the failed route to infinity.43Refer to the exhibit. EIGRP 1 has been configured on R1. What is the effect of configuring the ip bandwidth-percent eigrp command?The EIGRP bandwidth routing metric will be reduced by 30%.EIGRP 1 protocol traffic will be restricted to 30% of the link bandwidth.Packets that are routed based on EIGRP routing table entries will be limited to 30% of the link bandwidth. EIGRP traffic will be permitted to burst for short periods to 30% above the configured link bandwidth.44Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)All routes are stable.Each route has one feasible successor.The administrative distance of EIGRP has been set to 50.The show ip eigrp topology command has been run on R1.45Refer to the exhibit. A network designer is testing a prototype of WAN connections. All of the routers in the exhibit are configured for OSPF routing. The design requires that the path between routers A and D through ISP-A is the primary and the path through ISP-B servers as a backup. The designer notices that router A has two equal-cost paths to the LAN on router D. How can the designer correct this problem?Issue a clock rate 2000000 interface command on S0/0/1 of router ISP-B.Change the default OSPF reference bandwidth on router A.Configure two static routes with administrative distances of 10.Use the bandwidth command to change the default bandwidth on the link to router B.46Refer to the exhibit. R1 and R2 are unable to establish an adjacency. What two configuration changes will correct the problem? (Choose two.)Set a lower priority on R2.Configure the routers in the same area.Set a lower cost on R2 compared to R1.Add a backup designated router to the network.Match the hello and dead timers on both routers.47Refer to the exhibit. If the router loopback interfaces, FastEthernet interfaces, and OSPF priorities are configured as shown, which router would win an OSPF DR election?ABCD48 Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.)the same process IDthe same area IDnetwork addresses and wildcard masksthe same router IDthe same loop back address49Refer to the exhibit. What OSPF network statements are required for the router B to advertise the three networks that are attached?router ospf 1network 10.0.0.0 0.0.0.255 area 0router ospf 1network 10.1.1.0 0.3.255.255 area 0network 10.10.1.0 0.255.255.255 area 0network 10.20.1.0 0.255.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.255.255 area 0network 10.20.1.0 0.0.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.0.255 area 0network 10.20.1.0 0.0.0.255 area 050Refer to the exhibit. A network administrator is trying to determine why router JAX has no OSPF routes in its routing table. All routers are configured for OSPF area 0. From the JAX router, the administrator is able to ping its connected interfaces and the Fa0/1 interface of the ORL router but no other router interfaces. What is a logical step that the network administrator should take to troubleshoot the problem?Reboot the routers.Change the OSPF process ID on all of the routers to 0.Check to see if the cable is loose between ORL and JAX.Check to see if CDP packets are passing between the routers.Use show and debug commands to determine if hellos are propagating.CCNA第二学期《Final Examinnation》英文B卷1 A network administrator is in charge of two separate networks that share a single building. What device will be required to connect the two networks and add a common connection to the Internet that can be shared?hubrouteraccess pointEthernet switch2 Which two router component and operation pair are correctly described? (Choose two.)DRAM - loads the bootstrapRAM - stores the operating systemFlash - executes diagnostics at bootupNVRAM - stores the configuration fileROM - stores the backup configuration filePOST - runs diagnostics on hardware modules3 A router boots and enters setup mode. What is the reason for this?The IOS image is corrupt.Cisco IOS is missing from flash memory.The configuration file is missing from NVRAM.The POST process has detected hardware failure.4Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose two.)5 Which candidate route has the longest match for a packet with a destination address of 10.30.16.48?6Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices are properly configured and the destination network is advertised by both protocols.Which path will be used to transmit the data packets from PC1 to PC2?The packets will travel via R2-R1.The packets will travel via R2-R3.The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3.The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path.R 192.168.1.0/24 [120/3] via 192.168.110.1, 00:00:17, Serial0/1/0R 192.168.1.0/24 [120/2] via 192.168.200.1, 00:00:17, Serial0/0/0R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:17, Serial0/0/1R 192.168.1.0/24 [120/4] via 192.168.101.1, 00:00:17, Serial0/1/18Refer to the exhibit. The router receives a packet that is destined for 192.168.5.79. How will the router handle this packet?It will forward the packet via the FastEthernet0/0 interface.It will forward the packet via the Serial0/0/0 interface.It will forward the packet via the Serial0/0/1 interface.It will drop the packet.9 A network administrator uses the RIP routing protocol to implement routing within an autonomous system. What are two characteristics of this protocol? (Choose two.)It uses the Bellman-Ford algorithm to determine the best path.It displays an actual map of the network topology.It offers rapid convergence in large networks.It periodically sends complete routing tables to all connected devices.It is beneficial in complex and hierarchically designed networks.10 Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network.Routers in a multipoint network that run a link-state protocol can exchange routing tables.Routers use only hop count for routing decisions.The shortest path first algorithm is used.Split horizon is used to avoid routing loops.11 Which two statements are true about classless routing protocols? (Choose two.)They can be used for discontiguous subnets.They can forward supernet routes in routing updates.They cannot implement classful routes in routing tables.They use only a hop count metric.They do not include the subnet mask in routing updates.12 Which statement is true regarding routing metrics?All routing protocols use the same metrics.EIGRP uses bandwidth as its only metric.Routers compare metrics to determine the best route.The larger metric generally represents the better path.13 Which routing protocol by default uses bandwidth and delay to calculate the metric of a route?RIPv2OSPFEIGRP14 You have been asked to explain converged networks to a trainee. How would you accurately describe a converged network?A network is converged when all routers have formed an adjacency.A network is converged immediately after a topology change has occurred.A network is converged when all routers flush the unreachable networks from their routing tables.A network is converged after all routers share the same information, calculate best paths, and update their routing tables.15Refer to the exhibit. All the routers are properly configured to use the RIP routing protocol with default settings, and the network is fully converged. Router A is forwarding data to router E. Which statement is true about the routing path?Router A will send the data via the A-D-E path that is listed in the routing table.Router A will load-balance the traffic between A-B-E and A-C-E.Router A will determine that all paths have equal metric cost.Router A will send the data through A-D-E and keep A-B-E and A-C-E as the backup paths.16Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)a CSU/DSU devicean Ethernet switcha huba bridge17 Which component is typically used to connect the WIC interface of a router to a CSU/DSU?V.35 cableRJ-45 adaptercrossover cablestraight-through cable18 Which router mode is accessed by entering the enable command?user EXECprivileged EXECglobal configurationinterface configuration19Refer to the exhibit. What are the effects of the exhibited commands on the router?All passwords are encrypted.Only Telnet sessions are encrypted.Only the enable password is encrypted.Only the enable password and Telnet session are encrypted.Enable and console passwords are encrypted.20Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that interface FastEthernet0/1 is not functioning. Which action will most likely correct the problem with FastEthernet0/1?A clock rate should be added to the interface configuration.The subnet mask should be added to the interface configuration.An interface description needs to be added to the interface configuration.The no shutdown command needs to be added to the interface configuration.21Refer to the exhibit. Which two facts can be derived from this output? (Choose two.)Three network devices are directly connected to Router2.The serial interface between Router2 and Router3 is up.Router1 and Router3 are directly connected.Six devices are up and running on the network.Layer 3 functionality between routers is configured properly.22Refer to the exhibit. Which route in the routing table of R1 will be discarded by its neighboring router? 192.168.2.0192.168.3.0192.168.9.0192.168.10.0192.168.11.023Refer to the exhibit. All interfaces are addressed and functioning correctly. The network administrator runs the tracert command on host A. Which two facts could be responsible for the output of this command? (Choose two.)The gateway for Host A is missing or improperly configured.The gateway for Host B is missing or improperly configured.24 In which situation would a default static route be recommended?when connecting an edge router to the Internetwhen variable length subnet masking is in effectwhen there is more than one valid route for a destination networkwhen a destination network has a larger mask than any routes in the routing table25 What is the advantage of configuring a static route with an exit interface instead of a next-hop address?The router will perform a recursive lookup.This route will automatically be used as the gateway of last resort.The exit interface configuration consumes less router processing time.The exit interface configuration has an administrative distance value of 1.26Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will be listed in the R2 routing table?答案：D27 A static route has been configured on a router. However, the destination network no longer exists. What should an administrator do to remove the static route from the routing table?Change the routing metric for that route.Nothing. The static route will go away on its own.Change the administrative distance for that route.Remove the route using the no ip route command.28Refer to the exhibit. Hosts on the 192.168.1.0 network cannot communicate with hosts on the 172.16.1.1 network. The network administrator has run the show ip route command on R1.What could be the cause of this problem?The FastEthernet interface on R1 is disabled.Autosummarization is enabled on R1.The serial interface S0/0/0 of R1 is administratively down.No static route or routing protocol is configured.29A new static route must be configured on R1 with the R3 serial interface as the next hop.A new default route must be configured on R1 with the R3 serial interface as the next hop.The default route on R2 should be configured with the R3 serial interface as the next hop.The default route on R2 must be replaced with a new static route and the next hop should be the R1 FastEthernet interface.31Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2?32Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?The IP address of host A is incorrect.The default gateway of host A is incorrect.The Fa0/1 interfaces of the two routers are configured for different subnets.The subnet mask for the Fa0/0 interface of R1 is incorrect.33Automatic summarization is enabled on R1.The routing table of R2 contains only classful networks.R2 will reject this update.The routing protocol that is configured on both routers is RIPv1.34 Which additional piece of information is included in the updates of classless routing protocols to support the use of VLSM and discontiguous networks?metricnetwork maskneighbor router IDadministrative distance35Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down. Which statement is true regarding how the routers in this topology will respond to this event?Router4 will learn about the failed route 30 seconds later in the next periodic update.Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the holddown timer expires.Router5 immediately flushes the unreachable route from its routing table.Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0.clears an unreachable route from the routing table after the invalid timer expiresprevents regular update messages from inappropriately reinstating a route that may have gone badremoves an unreachable route from the routing table after the flush timer expireslimits the period of time or number of hops a packet can traverse through the network before it should be discardedused to mark the route as unreachable in a routing update that is sent to other routers37 Which two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.)authenticationlink-state advertisementshold-down timersSpanning Tree Protocolsplit horizon38Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem?An incorrect IP address is configured between the two routers.No static route is configured on Router2.A routing loop has occurred.No routing protocol is configured on either of the two routers.39。

Final Cut Pro中调整视频羽化的方法Final Cut Pro是一款专业的视频编辑软件，拥有强大的功能和用户友好的界面。

在编辑视频时，羽化效果可以给画面添加柔和的边缘，使得过渡更加自然流畅。

本文将介绍在Final Cut Pro中调整视频羽化效果的方法。

首先，启动Final Cut Pro并导入你想要编辑的视频素材。

在时间轴中选择你想要应用羽化效果的视频片段。

接下来，点击屏幕右上方的“视频效果”按钮。

在弹出的效果库中，选择“变形”-“羽化”选项。

调整羽化的大小和强度非常简单。

在预览窗口中，你可以看到应用了羽化效果的视频片段。

拖动“半径”滑块可以增加或减小羽化的范围。

较大的数值会产生更明显的羽化效果，而较小的数值则会使羽化范围变得更小。

另外，你还可以通过拖动“软化”滑块来调整羽化效果的强度。

较大的数值会使羽化边缘更柔和，而较小的数值则会使羽化边缘更清晰。

如果你只在视频片段的特定部分应用羽化效果，可以使用剪辑器中的关键帧功能。

首先在时间轴中选择应用羽化效果的视频片段，在顶部工具栏中点击“剪辑器”按钮。

然后，在关键帧控制选项卡中，点击右下角的“添加关键帧”按钮。

在时间轴上移动光标到你想要添加关键帧的位置，然后在“半径”和“软化”滑块旁边点击添加关键帧按钮。

在添加了关键帧后，你可以根据需要调整羽化的大小和强度。

Final Cut Pro还提供了其他一些高级羽化调整选项，如“角度”和“形状”。

通过调整“角度”滑块，你可以改变羽化效果的方向。

而通过点击“形状”选项卡，你可以选择不同的羽化形状，如矩形、椭圆或自定义形状。

当完成羽化效果的调整后，你可以预览整个视频的效果。

如果需要对其他视频片段应用相同的羽化效果，只需将已经调整好的羽化效果复制一份并粘贴到其他视频片段上即可。

总结起来，在Final Cut Pro中调整视频羽化效果非常简单。

通过选择视频片段，并在“视频效果”中应用“羽化”效果选项，你可以轻松调整羽化的大小和强度。