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

第1题：

第2题：

哪张路由表可以作为组播的RPFlookup（）

• A、inet.0
• B、inet.1
• C、inet.2
• D、inet.3

正确答案:A,C

第3题：

RIP version 2 is being used as the routing protocol within the Testking network.What does RIP version 2 use to prevent routing loops?（）

• A、CIDR
• B、Split horizon
• C、Authentication
• D、Classless masking
• E、Hold-down timers
• F、Multicast routing updates
• G、Path Vectoring

正确答案:B,E

第4题：

For maintaining separate unicast and multicast forwarding topologies, where should MBGP multicast routes be placed?（）

• A、inet.0
• B、inet.1
• C、inet.2
• D、inet.4

正确答案:C

第5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

正确答案:A

第6题：

Which two statements are true about the role of split horizon？（）

• A、It is a function used by routing protocols to install routes into routing table
• B、It is a function that prevents the advertising of routes over an interface that the router is usingto reach a route
• C、Its function is to help avoid routing loops.
• D、It is a redistribution technique used by routing protocols

正确答案:B,C

第7题：

Which statement is true about import and export routing policies?（）

• A、Import policies concern routes received and determine which routes get put into the routing table.
• B、Export policies concern routes received and determine which routes get put into the routing table.
• C、Export policies are applied before the routing table.
• D、Import polices are applied after the routing table.

正确答案:A

第8题：

By default, which routing table is used to store unicast IPv4 routes?（）

• A、inet.0
• B、inet.1
• C、inet.2
• D、inet.3

正确答案:A

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第14题：

Which of the following technologies can be used in distance vector routing protocols to prevent routing loops?（）

• A、Spanning Tree Protocol
• B、Shortest path first tree
• C、Link-state advertisements (LSA)
• D、Hold-down timers
• E、Split horizon
• F、VRP

正确答案:D,E

第15题：

Which BGP attribute is used by BGP to prevent routing loops?（）

• A、AS - path
• B、next - hop
• C、MED
• D、weight
• E、local preference
• F、origin

正确答案:A

第16题：

Which statement is true about a forwarding table?（）

• A、It stores a subset of information from the routing table.
• B、It contains routes learned from all protocols to a destination.
• C、It provides a database for routes selected and placed into the routing table.
• D、Every routing protocol maintains its own forwarding table.

正确答案:A

第17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、It is used to manage, the addition, deletion, and naming of VLANs across multiple switches.
• E、It is used to segment a network into multiple collision domains.
• F、None of the above.
• G、All of the above are functions of STP.

正确答案:C

第18题：

When attempting to view the OSPF routes in the routing table, you issue the command show route table inet.3 but no OSPF routes are displayed. What is the problem?（）

• A、The OSPF routes are located in the inet4.0 routing table.
• B、The OSPF routes are located in the inet.0 routing table.
• C、The OSPF routes are located in the inet.2 routing table.
• D、The OSPF routes are located in the inet4.3 routing table.

正确答案:B

第19题：

What is the default import routing policy for OSPF?（）

• A、Accept all OSPF routes and install them into the inet.3 routing table.
• B、Accept all OSPF routes and install them into the inet7.0 routing table.
• C、Accept all OSPF routes and install them into the inet4.0 routing table.
• D、Accept all OSPF routes and install them into the inet.0 routing table.

正确答案:D

第20题：

Which routing table stores IPv6 routes？（）

• A、inet.0
• B、inet.2
• C、inet6.0
• D、inet.v6
• E、ip-net.0

正确答案:C

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