echo request回声请求
echo request回声请求
相关考题：
调度请求用于请求新传输的『____』资源。(Scheduling request is used to request 『____』resource for new transmission.)
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
下面()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()
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
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.
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
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）
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
PING命令使用了哪种ICMP消息？（）A、RedirectB、Source quenchC、Echo request和Echo replyD、Destination unreachable
PING命令使用了哪种ICMP消息（）。A、RedirectB、Source quenchC、Echo request和Echor eplyD、Destination unreachable。
（）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（）
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
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