多选题Which three IP multicast address related statements are true？ （Choose three.） （）AMulticast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted  with Time to Live （TTL） greater than 1.BMulticast addresses 224.0.0.5 

第1题：

Which three IP multicast group concepts are true?（）

• A、If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.
• B、A router does not have to be a member of a multicast group to receive multicast data.
• C、A router must be a member of a multicast group to send to the group.
• D、A router does not have to be a member of a multicast group to send to the group.
• E、If a packet is sent to a multicast group address, all members of the multicast group will rece ive it.
• F、A router must be a member of a multicast group to receive multicast data.

第2题：

Which two statements are true about overflow pools？（）

• A、Overflow pools do not support PAT
• B、Overflow pools can not use the egress interface IP address for NAT
• C、Overflow pools must use PAT
• D、Overflow pools can contain the egress interface IP address or separate IP addresses

第3题：

第4题：

Which three IP multicast group concepts are true？ （Choose three.） （）

• A、 If a packet is sent to a multicast group address， all members of the multicast group will receive it
• B、 If a packet is sent to a multicast group address， the multicast frame contains the source multicast  address
• C、 A router does not have to be a member of a multicast group to receive multicast data.
• D、 A router does not have to be a member of a multicast group to send to the group.
• E、 A router must be a member of a multicast group to receive multicast data.
• F、 A router must be a member of a multicast group to send to the group.

第5题：

Which three IP multicast group concepts are true?（）

• A、If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.
• B、A router does not have to be a member of a multicast group to recei ve multicast data.
• C、A router must be a member of a multicast group to send to the group.
• D、A router does not have to be a member of a multicast group to send to the group.
• E、If a packet is sent to a multicast group address, all members of the multic ast group will receive it.
• F、A router must be a member of a multicast group to receive multicast data.

第6题：

Which three IP multicast address related statements are true？ （Choose three.） （） 

• A、Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted  with Time to Live （TTL） greater than 1.
• B、Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routers.
• C、Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link-local addresses used by PIMv2 and  IGMPv3.
• D、Because they would map to overlapping IP multicast MAC addresses， multicast addresses 224.0.1.1  and 238.1.1.1 could not be used together.
• E、Multicast address 224.0.1.1 has been reserved for the Network Time Protocol （NTP） by the IANA
• F、The administratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in  purpose to RFC 1918 private unicast addresses.

第7题：

Which three attributes are carried in a source active message?（）

• A、NLRI information
• B、IP address of originating RP
• C、address of multicast source
• D、all active RPs in the local domain
• E、group address to which the source is sending

第8题：

Which three IP multicast address related statements are true?（）

• A、Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link - local addresses used by PIMv2 and IGMPv3
• B、Because they would map to overlapping IP multicast MAC addresses, multicast addresses 224.0.1.1 and 238.1.1.1 could not be used toget her
• C、Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted with Time to Live (TTL) greater than 1
• D、Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routers
• E、The a dministratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in purpose to RFC 1918 private unicast addresses
• F、Multicast address 224.0.1.1 has been reserved for the Network Time Protocol (NTP) by the IANA

第9题：

Which three statements about anycast RP are true？ （）

• A、MSDP is running between anycast RPs
• B、Anycast RP provides redundancy and load-sharing capabilities
• C、Multicast BGP is running between anycast RPs
• D、In anycast RP，two or more RPs are configured with the same multicast IP address on loopback interfaces
• E、In anycast RP，two or more RPs are configured with the same unicast IP address on loopback interfaces

第10题：

Which three IP multicast related statements are true？ （Choose three.）  （）

• A、 Multicast addresses 224.0.1.0 through 238.255.255.255 are called globally scoped addresses. They are used to multicast data between organizations and across the Internet
• B、 The multicast address 224.0.0.1 is a globally scoped address that has been reserved for the Network  Time Protocol （NTP） by the IANA
• C、 Multicast addresses 239.0.0.0 through 239.255.255.255 are called limited scope addresses. They are  constrained to a local group or organization
• D、 Multicast addresses 224.0.0.5 and 224.0.0.6 are limited scoped addresses that have been reserved for  OSPF
• E、 Multicast addresses 224.0.0.0 through 224.0.0.255 are used for network protocols on local LAN segments. Because they are always transmitted with a Time to Live （TTL） of 1， they are never forwarded  by a router