多项选择题

Which two statements about NTP version 4 are true？（）

A.It supports fast synchronization at starting and before network failures
B.It supports automatic server discovery
C.It uses a fixed-point arithmetion
D.It supports the "nanokernel" kernel implementation
E.It does not support Public-Key Cryptography

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热门试题

多项选择题Process-levelredundancyisimplementedbyasystemmanagerprocessthatcreatesthestandbyprocess.Whattwofunctionsareprovidedbythesystem-levelprocesscalledQnetSymlinkManager（QSM）？（）

A.backing up the information for the broken connections
B.provides common information for connecting processes and services
C.detection of a failed connection
D.provides an abstract name for a process or service
E.distribution of symbolic link information

单项选择题InPIM-SMoperations，towhichdevicedoesthefirstrouterthatconnectswiththemulticastsourcesendtheregistermessage？（）

A.RP
B.multicast source
C.IGMP router
D.multicast receiver
E.PIM designated router

单项选择题WhatarethedefaultvaluesforGREtunnelkeeplivetimeandnumberofretries？（）

A.5 seconds and 3 retries
B.10 seconds and 5 retries
C.10 seconds and 3 retries
D.20 seconds and 5 retries
E.5 seconds and 5 retries

单项选择题HowmanymessagesdoesInternetKeyExchangeusetonegotiateSAcharacteristicwhenitrunsinaggressivemode？（）

A.3
B.4
C.5
D.2
E.6

单项选择题WhichstatementaboutSNMPistrue？（）

A.SNMP version 2 uses a proxy agent to forward GetNext message to SNMP version 3.
B.SNMP version 2 supports message integrity to ensure that a packet has not been tampered with
C.Proxy agents were used only in SNMP version 1.
D.SNMP version 3 supports encryption and SNMP version 2 support authentication.
E.GetBulk messages are converted to GetNext messages by the proxy agent and are then forwarded to the SNMP version 1 agent.