Which message type is constructed and sent from an MSDP router to its MSDP peers when it  receives a PIM register message （knowing that the MSDP router is also configured as an RP for  the PIM domain）？（）

In GLBP， which router will answer on client ARP requests？（）

What is the STP root guard feature designed to prevent？（）

What does a unicast prefix-based IPv6 multicast address start with？（）

An administrator of a peer-to-peer server application reports that the maximum bandwidth that his application receives is 90 Mb/s. You have an 8-port，100-Mb/s EtherChannel bundle on the switching infrastructure between the two servers， resulting in a bidirectional throughput of more than what is recorded. Which two solutions would allow for more bandwidth for the application？（）

Which statement best describes OSPF external LSAs （type 5）？（）

What does the OSPF command capability vrf-lite achieve？（）

Which two attributes need to match for two switches to become members of the same MST region？  （）

Which statement is correct about an OSPF sham-link？（）

For the following ports， which port is on every bridge in a Spanning Tree Protocol IEEE 802.1w network except the root bridge？（）