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？（）

A . PIM join messages are sent every 60 seconds to refresh the upstream router’s mroute state for the multicast tree. B . Routers send a PIM join acknowledgement in response to each PIM join message received from a downstream router. C . PIM join messages are only sent when the multicast distribution tree is first being established. D . PIM join messages are sent every three minutes to refresh the upstream router’s mroute state for the multicast tree.

A . Distress messages should first be transmitted on 2182 kHz B . Channel 16 (156.8 MHz) may be used for distress messages C . If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available D . It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duratio

A . The file system superblock is dirty. It can be replaced from the VGDA B . The logical volume superblock is dirty. It can be replaced from the VGDA C . The file system superblock is dirty. It can be replaced from the secondary copy D . The logical volume superblock is dirty. It can be replaced from the secondary copy

A . Reflected electron B . Electrical radiation C . Quarterpoint electrical navigation D . Hyperbolic radio navigatio

A . Source-Active Message B . PIM Join C . PIM Hello D . MSDP Register

A . after the subscriber is unavailable for 10 minutes B . when the subscriber is available C . after the subscriber is unavailable for after an hour D . are available until the specified time elapses E . are expired instantly

A . Language B . Linguistic sort C . Calendar D . Territory E . Character set

A .  XA Enabled B .  Connection URL C .  Local JNDI name D .  Quality of Service

A .  Language B .  Linguistic sort C .  Calendar D .  Territory E .  Character set

A . Routing group B . Send connector C . DNS D . Delivery agent

A . Both RTA and RTB will do LSA7/5 translation，since they are both NSSA ABRs B . RTA will do LSA7/5 translation，since it has the lower router ID C . RTB will do LSA7/5 translation，since it has the higher router ID D . The redistributing router will do LSA7/5 translation，since it is within the NSSA

A . by all means B . by no means C . by any means D . by means of

A . service console port B . ESX machine port group C . virtual machine port grou

A . Compound B . Greenstick C . Closed D . Crack

A .  int B .  void C .  boolean D .  static

A . The file system superblock is dirty. It can be replaced from the VGDA B . The logical volume superblock is dirty. It can be replaced from the VGDA C . The file system superblock is dirty. It can be replaced from the secondary copy D . The logical volume superblock is dirty. It can be replaced from the secondary copy

E-mail is a(n) ______ message delivery system that allows information such as typed messages and multimedia to be sent to individual compmer users． A．graphic-based B．char-based C．web-based D．text-based

A sender's credibility B receiver's assumptions C receiver's evaluative and tendency D receiver's attitude and needs E sender's knowledge

A．Governance over driverless cars B．Ethical debate C．Cars to be connected or not D．Emergency to be dealt with by the automated system or human drivers

A.PPPoE Active Discovery Offer B.PPPoE Active Discovery Initiation C.PPPoE Active Session Confirmation D.PPPoE Active Session Acknowledgment