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問(wèn)答題 R1收到組播信息而R2收不到，why？

參考答案： 有三種可能性：
（1）SW1 和SW2上都沒(méi)有啟用CGMP 或IGMP snoo...

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1.單項(xiàng)選擇題You use OSPF as your network routing protocol. You use the command show ip route and you see several routes described as O， O IA， O E1， and O E2. What routes are in your area？（）

A.O IA
B.O E1
C.O E2
D.O

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2.單項(xiàng)選擇題Your Cisco network currently runs OSPF and you have a need to policy-route some specific traffic， regardless of what the routing table shows. Which one of these options would enable you to policy-route the traffic？（）

A.source IP address and the protocol （such as SSL， HTTPS， SSH）
B.the packet Time to Live and the source IP address
C.type of service header and DSCP value
D.destination IP address

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3.單項(xiàng)選擇題 Refer to the exhibit. Routers A and B are directly connected and running OSPF， but they are unable to form a neighbor relationship. What is the most likely cause？（）

A.The routers are not on the same network.
B.The network statements do not match.
C.The process number does not match.
D.The MTU does not match.
E.The OSPF cost does not match.
F.There is a physical issue with the cable.

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4.多項(xiàng)選擇題In your Cisco EIGRP network， you notice that the neighbor relationship between two of your routers was recently restarted. Which two of these choices could have made this occur？（）

A.An update packet with init flag set from a known， already established neighbor relationship was received by one of the routers.
B.The ARP cache was cleared.
C.The counters were cleared.
D.The IP EIGRP neighbor relationship was cleared manually.

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5.多項(xiàng)選擇題Router 1 is configured for BGP as dual-homed on the Cisco network. Which three BGP attributes are carried in every BGP update on this router （both IBGP and EBGP）？（）

A.origin
B.router-ID
C.AS-path
D.local-preference
E.next-hop

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6.問(wèn)答題 簡(jiǎn)述相同的網(wǎng)段的互相訪問(wèn)問(wèn)題。

參考答案：They cannot communicate with each o...

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7.單項(xiàng)選擇題In BGP routing， what does the rule of synchronization mean？（）

A.A BGP router can only advertise an EBGP learned route， provided that the route is an IGP route in the routing table.
B.A BGP router can only advertise an IBGP learned route， provided that the route is an IGP route in the routing table.
C.A BGP router can only advertise an IBGP learned route， provided that the route is an IGP route that is not in the routing table.
D.A BGP router can only advertise an EBGP learned route， provided that the route is a metric of 0 in the BGP table.

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8.單項(xiàng)選擇題You have a router running BGP for the MPLS network and OSPF for the local LAN network at the sales office. A route is being learned from the MPLS network that also exists on the OSPF local network. It is important that the router chooses the local LAN route being learned from the downstream switch running OSPF rather than the upstream BGP neighbor. Also， if the local OSPF route goes away， the BGP route needs to be used. What should be configured to make sure that the router will choose the LAN network as the preferred path？（）

A.static route needs to be added
B.floating static route needs to be added
C.bgp backdoor command
D.ospf backdoor command

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9.問(wèn)答題BGP的Community對(duì)于選擇最優(yōu)路徑有什么作用？

參考答案：BGP communitiy can be used to ...

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10.單項(xiàng)選擇題 Refer to the exhibit. R2 and R3 are routers connected using Ethernet services from a service provider and can receive pings from each other. OSPF is configured as the routing protocol but adjacency is not happening. According to the output of the show commands in the exhibit， what could be the most likely cause of the problem？（）

A.Ethernet interfaces were configured as point-to-point.
B.Process IDs are not matching.
C.Configured bandwidths do not match on both interfaces.
D.Broadcasts and multicast are not being propagated over the Ethernet services.
E.OSPF cost does not match on both interfaces.

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