86.On the basis of the network provided in the exhibit, all routers are configured to run EIGRP on all links. If the link between PG-R1 and PG-R2 fails, what is the maximum number of queries PG-R3 will receive for 192.168.1.0/24, assuming that all the packets sent during convergence are transmitted once (there are no dropped or retransmitted packets)?
A. PG-R3 will receive up to four queries for 192.168.1.0/24, one each from PG-R2, PG-R4, PGR5,and PG-R6.
B. PG-R3 will receive up eight queries for 192.168.1.0/24, one from PG-R2, two from PG-R4,three from PG-R5, and four from PG-R6.
C. PG-R3 will receive one query for 192.168.1.0/24, since the remote routers, PG-R4, PG-R5, and PG-R6, are natural stubs in EIGRP.
D. PG-R3 will not receive any queries from PG-R2, because there are no alternate paths for 192.168.1.0/24.
Answer: A
87.You are a network engineer at PassGuide.com, study the exhibit carefully. The company's network is running EIGRP and you want to change the path PG-R5 uses to reach 172.30.1.0/24 to PG-R4. How could you achieve this goal? 更改路径，使得 R5 到 172.30.1.0/24 走 R4
A. Change the bandwidth on the link between PG-R2 and PG-R5 to 70, and change the bandwidth on the link between PG-R3 and PG-R5 to 70.
B. Change the bandwidth on the link between PG-R4 and PG-R5 to 110.
C. Change the bandwidth on the link between PG-R3 and PG-R5 to 70.
D. Donothing, the best path to 172.30.1.0/24 from PG-R5 is already through PG-R4.
Answer: A
88.On the basis of the network provided in the exhibit, R3 and R4 are configured to run all connected links in OSPF Area 1. The network administrator is complaining that traffic destined to 192.168.1.0/24 is being routed to R2, even if R2 is not running OSPF. Which would be the cause of this problem? 基于提供的网络图，R3和R4都配置了OSPF在区域1，网络管理员抱怨流量指定到 192.168.1.0/24是走路由器R2，尽管R2没有运行OSPF。什么原因导致这个问题?
A. The next hop towards 192.168.1.0/24 at PG-R4 should be 10.1.1.2, which is PG-R2.
B. The next hop towards 192.168.1.0/24 at PG-R4 should be 10.1.1.1, since PG-R1 is redistributing the route from EIGRP into OSPF. PG-R3 is forwarding traffic incorrectly.
C. The next hop towards 192.168.1.0/24 at PG-R4 should be 10.1.2.2, which is PG-R3. PGR3 should be load-sharing between PG-R1 and PG-R2 for its next hop.
D. PG-R4 does not have a route towards 192.168.1.0/24, so the network administrator is wrong in thinking any traffic is being forwarded there.
Answer: A
89.Observe the following exhibit seriously, which path will be preferred by traffic destined to 10.1.3.1 and arriving at PG-R1? 认真观察所给图，哪条路径将被优先流量指派到10.1.3.1和到达PG-R1
A. through PG-R3, because PG-R1 will only have a summary (type 3) LSA from PG-R2
B. through PG-R2, since it is the path through Area 0
C. through PG-R3, since that is the lowest cost path (10+10 = 20, which is lower than 100)
D. through PG-R2; this is the only path available for PG-R1 to reach 10.1.3.0/24, since PG-R3 is in a different autonomous system than PG-R1 and PG-R2
Answer: B
90.Which description of the following is true according to the information shown in the figure? 对于列出的信息，那个是正确的?
A. PG-RTC will not have the 192.168.10.0 network in its routing table.
B. PG-RTC will not have the 10.0.0.0 network in its routing table.
C. PG-RTB will not have the 10.0.0.0 network in its routing table.
D. PG-RTB and PG-RTC will not have the 10.0.0.0 network in their routing tables.
Answer: B
91.Observe the following network presented in this exhibit carefully. Assume that
all routers are running EIGRP in AS 100 on all connected links. If the link between PG-R3 and PG-R4 is down,how many queries will PG-R5 and PG-R6 receive? 对列出的拓扑图仔细观察，如果所有的路由器运行EIGRP 100在所有的链接上，如 果PG-R3 and PG-R4间的link down掉，有多少个查询PG-R5 and PG-R6将会收到
A. PG-R6 will receive two queries, one for 192.168.1.0/24 and one for 192.168.2.0/24. PG-R5 will receive one query, for 192.168.1.0/24.
B. PG-R5 will receive one query, for 192.168.1.0/24, and PG-R6 will receive no queries
C. Both PG-R5 and PG-R6 will receive two queries, one for 192.168.1.0/24 and one for 192.168.2.0/24
D. Neither PG-R5 nor PG-R6 will receive any queries for either 192.168.1.0/24 or 192.168.2.0/24.
Answer: A
92.This question is about the formation of OSPF adjacency. An OSPF adjacency will not form correctly across a point-to-point link in the same area. Which would most likely cause this problem? 这个问题是关于OSPF邻接关系的形成， 一个OSPF的邻接将不会形成正确穿过点到 点链路在同一区域。哪个是最有可能的原因?
A. Each interface has a different OSPF cost.
B. Each interface is configured with secondary addresses as well as primary addresses.
C. Each interface has a different MTU size. 每个接口都有不同大小的MTU
D. Each interface is configured with theip unnumbered loopback 0 command.
Answer: C
93.Which statement best describes OSPF external LSAs (type 5)? 哪个选项正确的表述了OSFP外部的LSA ?
A. OSPF external LSAs are automatically flooded into all OSPF areas, unlike type 7 LSAs, which require that redistribution be configured.
B. External LSAs (type 5) are automatically changed to type 1 LSAs at ASBRs.
C. Type 5 LSAs are route summaries describing routes to networks outside the OSPF Autonomous System.
D. External network LSAs (type 5) redistributed from other routing protocols into OSPF are not permitted to flood into a stub area. 外部网络LSA类型为5重发布从其他路由协议到OSPF将不允许泛红到末节区域。
Answer: D
94.Based on the network displayed in the exhibit, both PG-R1 and PG-R2 are configured as EIGRP stub routers. If the link between PG-R1 and PG-R3 is down, will PG-R3 still be able to reach 192.168.1.0/24, and why or why not? 在给出的网络图中，PG-R1 and PG-R2都配置了EIGRP stub，如果PG-R1 和 PG-R3中链路down掉了，PG-R3仍然能到192.168.1.0/24吗?为什么?
A. No. PG-R3 would remove its route to 192.168.1.0/24 through PG-R1, but would not query PGR2 for an alternate route, since PG-R2 is a stub.
B. No. The path through PG-R2 would always be considered a loop at PG-R3.
C. Yes. When a directly connected link fails, a router is allowed to query all neighbors, including stub neighbors, for an alternate route.
D. Yes, because PG-R3 would know about both routes, through PG-R1 and PG-R2, before the link between PG-R1 and PG-R3 failed.
Answer: A
95.On the basis of the exhibit provided, assuming that EIGRP is the routing protocol, then at R5, what would be the status of each path to 172.30.1.0/24? 在给出的图中，假设路由协议是EIGRP，在R5，将是什么状态在每条路径到 172.30.1.0/24?
A. the path through PG-R3 would be the successor, the path through PG-R1 would be a feasible successor, and the path through PG-R4 would be neither a successor nor a feasible successor
B. not enough information has been given to figure out what the status of each route would be
C. the path through PG-R3 would be the successor, and the paths through PG-R1 and PG-R4 would be feasible successors
D. the path through PG-R1 would be the successor, the path through PG-R3 would be a feasible successor, and the path through PG-R4 would be neither a successor nor feasible successor
Answer: A
