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echo request回声请求
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调度请求用于请求新传输的『____』资源。(Scheduling request is used to request 『____』resource for new transmission.)
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When you use the ping command to send ICMP messages across a network, what's the most common request/reply pair you'll see? (Select one answer choice)A.Echo request and Echo replyB.ICMP hold and ICMP sendC.ICMP request and ICMP replyD.Echo off and Echo onE.None of the above
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下面()方法可以返回当前请求的请求方式。
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By default, which PPP mechanism does the ERX Edge Router use to monitor the session for a PPP over ATM client?()
A. pingB. helloC. get requestD. echo request
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Which two statements regarding traceroute on JUNOS devices are correct?()
A.Traceroute transmits ICMP echo-request packets.B.Traceroute transmits UDP packets.C.Traceroute receives ICMP echo-reply packets.D.Traceroute receives ICMP port-unreachable packets.
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常用来进行网络连通性检查的Ping命令工具,它的工作原理为()。
A.向目标主机发送UDP Echo Request数据包,等待对方回应UDP Echo Reply数据包B.向目标主机发送ICMP Echo Request数据包,等待对方回应ICMP Echo Reply数据包C.向目标主机发送UDP Echo Reply数据包,等待对方回应ICMP Echo Request数据包D.向目标主机发送ICMP Echo Reply数据包,等待对方回应ICMP Echo Request数据包
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在OSI模型中,提供了四种服务原语,包括请求服务的原语和提供服务的原语。由服务用户向服务提供者请求服务所用的原语是()。A、response(响应)、confirm(证实)B、request(请求)、indication(指示)C、request(请求)、confirm(证实)D、request(请求)、response(响应)
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PPP Echo-Request、Echo-Reply除了握手之外,还具备检测环路的功能,那么它会携带什么配置参数选项?()A、Maximum-Receive-UnitB、Magic-NumberC、Authentication-ProtocolD、Reserved
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PING命令使用了哪种ICMP消息?()A、RedirectB、Source quenchC、Echo request和Echo replyD、Destination unreachable
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PING命令使用了哪种ICMP消息()。A、RedirectB、Source quenchC、Echo request和Echor eplyD、Destination unreachable。
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()方法可以返回当前请求的请求方式。A、request.getAttribute()B、session.getMethod()C、request.getMethod()D、request.getRequestURI()
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By default, which PPP mechanism does the ERX Edge Router use to monitor the session for a PPP over ATM client?()A、pingB、helloC、get requestD、echo request
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单选题默认情况下,ICMP列表中()。A
不允许任何ICMP消息B
允许所有ICMP消息C
只允许传入的echo请求D
不允许传入的echo请求
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