Which of the following are shared distribution tree characteristics？ （Choose all that apply.）（）A、Memory requirements are higher for shared distribution tree than for source distribution treeB、Creates a tree from a central RP to all last-hop routersC、Uses 

第1题：

第2题：

Which three statements about bidirectional PIM are true？（）

• A、Traffic for a bidirectional group flows along the one shared tree and simultaneously utilizes multiple paths in a redundant network topology
• B、It does not require any traffic signaling in the protocol
• C、Membership to a bidirectional group is signaled using explicit Join messages
• D、It maintains source-specific forwarding state
• E、It reduces memory， bandwidth， and CPU requirements

正确答案:B,C,E

第3题：

Which of the following are shared distribution tree characteristics（）

• A、Memory  requirements are higher for shared distribution tree than for source distributiontree.
• B、Creates a tree from a central RP to all last-hoprouters.
• C、Uses a rendezvous point.
• D、An optimal path is created between each source router and each last-hoprouter.
• E、Place（S，G）entry in each router’smulticast routing table.
• F、Place（*，G）entry in a router’smulticast routing to table.

正确答案:B,C,F

第4题：

Which of the following is true regarding Label Distribution Protocol （LDP）？（）

• A、It is a label distribution protocol for MPLS
• B、It is a set of procedures and messages by which LSRs establish Label Switch Paths （LSPs） through a network
• C、Tag distribution Protocol （TDP） was the basis for LDP
• D、All of the above are true

正确答案:D

第5题：

Which two statements are tru e about the rendezvous point (RP) in a multicast network?（）

• A、The multicast sources must register with the RP to form the multicast distribution tree
• B、An RP is required only in networks running Protocol Independent Multicast dense mode ( PIM DM)
• C、The multicast receivers must register with the RP to form the multicast distribution tree
• D、An RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM)
• E、An RP is required only in networks running Pro tocol Independent Multicast sparse - dense mode (PIM - SDM)
• F、To form the multicast distribution tree, the multicast sources register with and the receivers join the RP

正确答案:D,F

第6题：

Which statement about PIM sparse mode operations is true？（）

• A、It does not support all underlying unicast routing protocols like BGP
• B、Receivers are registered with RP by their first hop router
• C、From the RP， traffic flows down a source tree to each receiver.
• D、It supports shared trees only， and assumes all hosts want the multicast traffic
• E、Receivers are joined to the shared tree by their local designated router

正确答案:E

第7题：

Which of the following defines memory interleaving?（）

• A、The distribution of data written across all the memory DIMMs and the L1 cache
• B、The distribution of data written across all the memory DIMMs in one bank
• C、The distribution of data written across all the memory DIMMs and the processor
• D、The distribution of data written across all the memory DIMMs and the L2 cache

正确答案:B

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第13题：

Which two of these statements correctly describe classic PIM-SM？（）

• A、The IOS default is for a last-hop router to trigger a switch to the shortest path tree as soon as a new source is detected on the shared tree.
• B、The IOS default is for every one of the routers on the shared tree to trigger a switch to the shortest path tree as soon as a new source is detected on the shared tree.
• C、The default behavior of switching to the shortest path tree as soon as a new source is detected on the shared tree can be disabled by setting the value in the ip pim spt-threshold command to "infinity."
• D、The default behavior of switching to the shortest path tree as soon as a new source is detected on the shared tree can be disabled by setting the value in the ip pim spt-threshold command to "zero."

正确答案:A,C

第14题：

Which of the following statements is correct regarding PIM Sparse Mode operations？（）

• A、It does not support all underlying unicast routing protocols like GBP
• B、It supports shared trees only assuming all hosts want the multicast traffic
• C、Receivers are registered with RP by their first-hop router
• D、Receivers are joinedto the Shared Tree（rooted the rp ）by their local Designated Router（DR）
• E、From the RP，traffic flows down a Source Tree to each receiver

正确答案:D

第15题：

What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations？（）

• A、immediately after receiving the first packet on the shared tree for a given （S，G）
• B、after receiving over 1 kb/s traffic onthe shared tree for a given （S，G）
• C、10 seconds after receiving the first packet on the shared tree for a given （S，G）
• D、30 seconds after receiving the first packet on the shared tree for a given （S，G）
• E、after receiving over 10 kb/s traffic onthe shared tree for a given （S，G）

正确答案:A

第16题：

Which of the following troubleshooting targets is considered to be a Layer 2 issue？（Choose allthat apply.）（）

• A、Spanning Tree Protocol
• B、Cabling
• C、Frame forwarding
• D、Packet forwarding
• E、EtherChannel
• F、Routing protocols

正确答案:A,C,E

第17题：

Your company has a single-domain Active Directory forest. The functional level of the domain is Windows Server 2008.   You perform the following activities.    Create a global distribution group.      Add users to the global distribution group.      Create a shared folder on a Windows Server 2008 member server.      Place the global distribution group in a domain local group that has access to the shared folder.  You need to ensure that the users have access to the shared folder.  What should you do（）

• A、Raise the forest functional level to Windows Server 2008.
• B、Add the global distribution group to the Domain Administrators group.
• C、Change the group type of the global distribution group to a security group.
• D、Change the scope of the global distribution group to a Universal distribution group.

正确答案:C

第18题：

Which two statements are true about the rendezvo us point (RP) in a multicast network?（）

• A、The multicast sources must register with the RP to form the multicast distribution tree.
• B、An RP is required only in networks running Protocol Independent Multicast dense mode (PIM DM).
• C、The mu lticast receivers must register with the RP to form the multicast distribution tree.
• D、An RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM).
• E、An RP is required only in networks running Protocol Independent Mu lticast sparse - dense mode (PIM - SDM).
• F、To form the multicast distribution tree, the multicast sources register with and the receivers join the RP.

正确答案:D,F

第19题：

You are a network administrator of your network. You want to install Windows 2000 professional on 100 computers from a central location. You want to copy a customized application with theinstallation process to all the 100 computers.  What should you do to copy that application during the installation process to the computers.（）

• A、 It cannot be done.
• B、 Copy the application to the temp folder of the distribution server.
• C、 Create a folder named $OEM$ as a sub folder in the distribution folder of  source files.
• D、 Create a folder named $COPYDIR$ as a sub folder in the distribution folder of source files.

正确答案:C

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