Which of following is used to periodically multicast by DIS 

第1题：

Which of the following correctly fills in the missing words of this sentence： An ARP request uses aaddress， whereas an ARP reply uses a address.（）

• A、broadcast， multicast
• B、unicast， broadcast
• C、broadcast， unicast
• D、multicast， unicast
• E、broadcast， broadcast
• F、unicast， multicast

第2题：

Which protocol is used by multicast to prevent loops?（）

• A、OSPF
• B、RIP
• C、RPF
• D、BGP
• E、EIGRP

第3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4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

第5题：

Which of the following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）

• A、CSNP
• B、LSP
• C、ISH
• D、Hello
• E、IIH
• F、PSNP

第6题：

What is the purpose of IGMP in a multicast implementation？（）

• A、 it is not used in multicast
• B、 it determines the virtual address group for a multicast destination
• C、 it dynamically registers individual hosts in a multicast group on a specific LAN
• D、 it is used on WAN connections to determine the maximum bandwidth of a connection
• E、 it determines whether Bidirectional PIM or PIM sparse mode will be used for a multicast flow

第7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8题：

Which of following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）

• A、LSP
• B、PSNP
• C、ISH
• D、CSNP
• E、IIH

第9题：

What is periodically multicasted （every 10 seconds） by the DIS on a LAN to ensure IS-IS Link StateDatabase accuracy？（）

• A、PSNP
• B、CSNP
• C、LSP
• D、IIH
• E、ISH

第10题：

Which of the following utilities are used to choose which programs run at startup？ （）

• A、SFC
• B、SETDEBUG
• C、MSCONFIG
• D、REGEDIT