Which two multicast IP addresses can be represented by the multicast MAC addre ss 0100.5e0A.0A07?（）

A . 169.254.23.59 B . 223.254.255.254 C . 225.1.1.1 D . 227.43.34.2 E . 238.3.3.3 F . 249.1.2.3

A . a single host B . a subset of hosts C . all hosts sequentially D . all hosts simultaneously

A .  no congestion avoidance B .  not for bandwidth intensive applications C .  no guaranteed delivery mechanism D .  source sends multiple data streams out each interface

A . ASM B . BiDirPIM C . PIM-SMRP D . RP-Switchover E . SourceSpecificMulticast

A . only the low-order 23 bits of the MAC address are used to map IP addresses B . only the low-order 24 bits of the MAC address are used to map IP addresses C . only the high-order 23 bits of the MAC address are used to map IP addresses D . only the low-order 23 bits of the IP address are used to map MAC addresses E . the 0x01004f MAC address prefix is used for mapping IP addresses to MAC addresses F . the 0x01005e MAC address prefix is used for mapping IP addresses to MAC addresse

A . 6to4 B . 6over4 C . ISATAP D . 6PE E . GRE

A . It prevents message looping，Session Advertisement（SA）messages must be RPF checked B . RPF check should be done against the route to the Rendez-vous Point of the corresponding PIM-SM domain，which originated the SA C . RPF checking Session Advertisement（SA）messages will cause message looping D . RPF check should be done against the route to the source S of the corresponding PIM-SM domai

A . RTA will forward RP announcements provided they are within the scope of 31. B . RTA will originate RP announcements with TTL s et to 31. C . RTA will originate RP announcements for multicast groups that match access - list 5. D . RTA will drop all RP announcements it receives if the TTL field is greater than 31.

A . 6to4 B . 6over4 C . ISATAP D . 6PE E . GRE

A . PIM sparse - dense mode and PIM dense mode require an RP on the network. B . PIM sparse mode and PIM dense mode require an RP on the network. C . PIM sparse mode interfaces are always added to the multicast routing table in a router. D . PIM sparse mode and PIM sparse - dense mode require an RP on the network. E . PIM dense mode interfaces are always added to the multicast routing table in a router. F . PIM sparse - dense mode acts as PIM dense mode if an RP is not known.

A .  224.21.106.44 B .  224.25.106.44 C .  233.149.106.44 D .  236.25.106.44 E .  239.153.106.44

A .  3600 series B .  7200 series with NSE-1 C .  7500 series D .  12000 serie

A .  Dense mode multicast requires explicit join messages from their members. B .  Dense mode multicast uses a push model to flood traffic throughout the network and then prunes the  unwanted traffic. C .  Sparse mode multicast uses a pull model to send multicast traffic to where it is requested.   D .  Sparse mode uses reverse path forwarding （RPF） to prune off redundant flows. E .  The primary use of sparse mode multicast is for test labs and router performance testing.

A .  a single host B .  a subset of hosts C .  all hosts sequentially D .  all hosts simultaneously

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

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.

A . 3600 series B . 7200 series with NSE-1 C . 7500 series D . 12000 serie

A .  multicast routing uses RPF B .  multicast routing is connectionless. C .  In multicast routing， the source of a packet is known. D .  When network topologies change， multicast distribution trees are not rebuilt， but use the originalpath E .  Multicast routing is much like unicast routing， with the only difference being that it has a a groupof receivers rather than just one destinatio

A . globally scoped address range B . 239.0.0.X or 239.128.0.X address range C . administratively scoped address range that does not overlap with a link-local MAC address D . any Class D address range E . site-local scoped address range

A . only the low-order 23 bits of the MAC address are used to map IP addresses B . only the low-order 24 bits of the MAC address are used to map IP addresses C . only the high-order 23 bits of the MAC address are used to map IP addresses D . only the low-order 23 bits of the IP address are used to map MAC addresses E . the 0x01004f MAC address prefix is used for mapping IP addresses to MAC addresses F . the 0x01005e MAC address prefix is used for mapping IP addresses to MAC addresse

A . Multicast traffic is sent out on Cisco APs at the highest mandatory data rate. B . Multicast traffic is sent out on Cisco APs at the highest supported data rate. C . On Cisco APs， multicast traffic and beacons are sent out at the same data rates to maintain a common cell size for normal data as well as multicast data. D . If there is more than one mandatory data rate， multicast traffic will be sent at the highest mandatory rate and beacons will be sent at the lowest mandatory rate. E . On Cisco APs， multicast traffic will be sent out at the highest data rate that a client can maintain with the AP.

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.

A . no congestion avoidance B . not for bandwidth intensive applications C . no guaranteed delivery mechanism D . source sends multiple data streams out each interface

A . First （most significant ） octet is FF in hex B . Starts with a prefix of FE80 to FEBF in hex C . Starts with a prefix of FECO to FEFF in hex D . Second octet contains a 4-bit multicast scope field E . Last 64 bit contains the modified MAC address of the Ethernet interface F . Is allocated from the unicast address space