单项选择题

WhatisacharacteristicofNetworkTimeProtocol？（）……

What is a characteristic of Network Time Protocol？（）

A.NTP updates are sent in the timezone they are collected in，and the syslog server will adjust based on the input time.
B.NTP authentication verifies the source，not the recipient.
C.NTP authentication requires that the recipient has multiple strata clocks to ensure accuracy.
D.Secure NTP can be configured to use SHA-1 hashing，since NTP is very insecure.
E.A stratum 0 clock should be configured at the core of every network，so it can connect to an accuratetime source.

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热门试题

单项选择题Refer to the exhibit. You are setting up a 2-gigabit EtherChannel. Following IEEE standards， the exhibit shows your configuration in a local switch1. However， EtherChannel is not coming up. Which one of these statements could be a possible reason？（）

A. EtherChannel is only available in Cisco equipment.
B. The customer side is supposed to be running PAgP, which is a Cisco standard.
C. PAgP is not an IEEE standard. VRRP should be used.
D. The configuration on switch1 needs to be modified to use LACP.

多项选择题WhichthreeprotocolsshouldbeexplicitlymanagedbyusingControlPlanePolicingonanInternetborderrouter？（）

A.LDAP
B.ICMP
C.RTP
D.BGP
E.SSH
F.RDP

多项选择题Whichtwostatementsaretrueaboutbandwidthguarantee？（）

A.When congestion is present，the priority command doesn’t allow exceeding the allocated rate
B.When congestion isn’t present，the priority command doesn’t allow exceeding the allocated rate
C.When congestion is present，the priority command allows exceeding the allocated rate
D.When congestion isn’t present，the priority command allows exceeding the allocated rate

单项选择题WhichQoSmechanismcanhelpclassifydifferentkindsofCitrixtrafficprintjobversusreal-timeterminalcontrol？（）

A.qos-group
B.DSCP
C.LFI
D.NBAR

单项选择题Refer to the exhibit. Router E learned about the PIM RP （designated as 7.7.7.7） from four different sources. Routers A and D advertised the 7.0.0.0 network via EIGRP. Routers B and C advertised the 7.0.0.0 network via OSPF. Considering that all four Ethernet interfaces on router E could potentially lead back to the PIM-RP， when router E receives the first multicast packet down the shared tree， which incoming interface will be used to successfully pass the RPF check？（）

A. E0
B. E1
C. E2
D. E3
E. None of these interfaces will be used to successfully pass the RPF check.
F. All of these interfaces would successfully pass the RPF check.