Which of the following protocols requests membership to a multicast group?（）A、IGMPB、SNMPC、SMTPD、ICMP
Which of the following protocols requests membership to a multicast group?（）
- A、IGMP
- B、SNMP
- C、SMTP
- D、ICMP
相关考题：
● A multicast router may receive thousands of multicast （71） every day for different groups. If a router has no knowledge about the membership status of the （72） , it must broadcast all of these packets. This creates a lot of traffic and consumes （73）. A better solution is to keep a list of groups in the network for which there is at least one loyal member. （74） helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the （75） packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.（71）A. packetsB. errorsC. reportsD. alarms（72）A. routersB. networkC. packetsD. hosts（73）A. capabilityB. powerC. bandwidthD. address（74）A. ICMPB. IGMPC. OSPFD. RIP（75）A. anycastB. multicastC. unicastD. broadcast
Which three of the protocols below belong to the application layer? (Select three answer choices)A. ARPB. HTTPSC. SMTPD. CDPE. TFTPF. ICMP
Which one of the following protocols uses both UDP and TCP ports for the transport layer operation?A．FTPB．TFTPC．SMTPD．TelnetE．DNS
A multicast router may receive thousands of multicast(71)every day for different groups. If a router has no knowledge about the membership status of the(72), it must broadcast all of these packets. This creates a lot of traffic and consumes(73). A better solution is to keep a list of groups in the network for which there is at least one loyal member.(74)helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the(75)packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.A．packetsB．errorsC．reportsD．alarms
Which of the following protocols utilize UDP as the layer 4 transport mechanism?() A.TACACSB.TelnetC.SMTPD.SNMPE.HTTPF.TFTP
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.
Which two statements are true about Internet Group Management Protocol (IGMP) snooping?() A. IGMP snooping and Cisco Group Membership Protocol (CGMP) can be used simultaneously on a switch.B. IGMP snooping a nd Cisco Group Membership Protocol (CGMP) were developed to help Layer 3 switches make intelligent forwarding decisions on their own.C. IGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IG MP message toward the router.D. IGMP snooping is an IP multicast constraining mechanism for Layer 2 switches.E. IGMP snooping is enabled with the ip multicast - routing global configuration command.
Which tech nology manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?（）A、IGMPB、IGMP snoopingC、PIM - DMD、DVMRPE、MOS PF
Which statement is true of a source that wants to transmit multicast traffic to group 239.1.1.1？（）A、Before sending traffic, it must first join multicast group 239.1.1.1 by sending an IGMPv2 membership report to the default router on the local subnet.B、It must send an IGMPv2 Request to Send packet and then wait for an IGMPv2 Clear to Send packet from the IGMPv2 querier router on the local subnetC、It may begin transmitting multicast traffic to the group only when there is no other host transmitting to the group on the local subnet.D、It may transmit multicast traffic to the group at any time.
Which of the following protocols utilize UDP as the layer 4 transport mechanism?（）A、TACACSB、TelnetC、SMTPD、SNMPE、HTTPF、TFTP
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.
Which of the following protocols would be used to test if one host is reachable by another host， by sending echo requests and waiting for echo replies？（）A、SNMPB、ICMPC、TCPD、UDP
Which three of the protocols below belong to the application layer?（）A、ARPB、HTTPSC、SMTPD、CDPE、TFTPF、ICMP
Which two statements are true about Internet Group Management Protocol (IGMP) snooping?（）A、IGMP snooping and Cisco Group Membership Protocol (CGMP) can be used simultaneously on a switch.B、IGMP snooping a nd Cisco Group Membership Protocol (CGMP) were developed to help Layer 3 switches make intelligent forwarding decisions on their own.C、IGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IG MP message toward the router.D、IGMP snooping is an IP multicast constraining mechanism for Layer 2 switches.E、IGMP snooping is enabled with the ip multicast - routing global configuration command.
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 itB、 If a packet is sent to a multicast group address， the multicast frame contains the source multicast addressC、 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.
Which of the following server roles provides a common time to all computers？（）A、NTPB、SNMPC、SMTPD、RAS
单选题Which statement is true of a source that wants to transmit multicast traffic to group 239.1.1.1？（）ABefore sending traffic, it must first join multicast group 239.1.1.1 by sending an IGMPv2 membership report to the default router on the local subnet.BIt must send an IGMPv2 Request to Send packet and then wait for an IGMPv2 Clear to Send packet from the IGMPv2 querier router on the local subnetCIt may begin transmitting multicast traffic to the group only when there is no other host transmitting to the group on the local subnet.DIt may transmit multicast traffic to the group at any time.
单选题Which of the following protocols requests membership to a multicast group?（）AIGMPBSNMPCSMTPDICMP
多选题Which three IP multicast group concepts are true?（）AIf a packet is sent to a multicast group address, the multicast frame contains the source multicast address.BA router does not have to be a member of a multicast group to recei ve multicast data.CA router must be a member of a multicast group to send to the group.DA router does not have to be a member of a multicast group to send to the group.EIf a packet is sent to a multicast group address, all members of the multic ast group will receive it.FA router must be a member of a multicast group to receive multicast data.
多选题Which three IP multicast group concepts are true?（）AIf a packet is sent to a multicast group address, the multicast frame contains the source multicast address.BA router does not have to be a member of a multicast group to receive multicast data.CA router must be a member of a multicast group to send to the group.DA router does not have to be a member of a multicast group to send to the group.EIf a packet is sent to a multicast group address, all members of the multicast group will rece ive it.FA router must be a member of a multicast group to receive multicast data.