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单选题
Which mechanism does External BGP use to prevent the formation of routing loops?（）
A
AS path
B
Split horizon
C
Poison reverse
D
Unicast RPF check
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Based on the network shown in the graphic which option contains the potential networking problem and protocol or setting that can to prevent the problem?()
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What is the purpose of the spanning-tree algorithm in a switched LAN?（）A、To provide a monitoring mechanism for networks in switched environments.B、To manage VLANs across multiple switches.C、To prevent switching loops in networks with redundant switched paths.D、To segment a network into multiple collision domains.E、To prevent routing loops in networks.
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单选题In a switched LAN network, what is the Spanning-Tree algorithm used for?（）A
It is used to provide a mechanism for routing updates in switched environments.B
It is used to prevent routing loops in networks with redundant routes.C
It is used to prevent switching loops in networks with redundant switched routes.D
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It is used to segment a network into multiple collision domains.F
None of the above.G
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考题
单选题Which BGP attribute is used by BGP to prevent routing loops?（）A
AS - pathB
next - hopC
MEDD
weightE
local preferenceF
origin
考题
单选题Your MPLS implementation is currently using internal backdoor links. What can you do to minimize the impact of having these links？（）A
use BGP as the CE-PE routing protocolB
use OSPF as the CE-PE routing protocolC
use EIGRP as the CE-PE routing protocolD
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use route redistribution at each location to ensure external routes are imported into the IGP
考题
单选题What is the purpose of the spanning-tree algorithm in a switched LAN?（）A
To provide a monitoring mechanism for networks in switched environments.B
To manage VLANs across multiple switches.C
To prevent switching loops in networks with redundant switched paths.D
To segment a network into multiple collision domains.E
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考题
单选题Which routing table stores IPv4 unicast routes and is used by multicast routing protocols to prevent loops?（）A
inet.0B
inet.1C
inet.2D
inet.3
考题
单选题For which routes does LDP advertise a label binding？（）A
all routes in the routing tableB
only the IGP and BGP routes in the routing tableC
only the BGP routes in the routing tableD
only the IGP routes in the routing table
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