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PING使用了()的Echo请求与Echo回答报文。
- A、ICMP
- B、ARP
- C、SNMP
- D、IP
参考答案
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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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源主机ping 目的设备时,如果网络工作正常,则目的设备在接收到该报文后,将会向源主机回应ICMP( )报文。
A.Echo Request
B.Echo Reply
C.TTL-Exceeded
D.Port-Unreachable
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源主机ping目的设备时,如果网络工作正常,则目的设备在接收到该报文后,将会向源主机回应ICMP()报文。A、Echo RequestB、Echo ReplyC、TTL-ExceededD、Port-Unreachable
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Which configuration would make an IP SLA probe use a precedence value of 5?()A、ip sla 1 icmp-echo 1.1.1.1 tos 160B、ip sla 1 icmp-echo 1.1.1.1 tos 20C、ip sla 1 icmp-echo 1.1.1.1 precedence 5D、ip sla 1 icmp-echo 1.1.1.1 dscp 20
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What happens when you issue the ping 172.19.102.2 count 5 command?()A、ICMP echo requests are sent to 172.19.102.2 in five-millisecond intervals.B、ICMP echo requests are sent to 172.19.102.2 until five packets are dropped.C、ICMP echo requests are sent to 172.19.102.2 five times.D、ICMP echo requests are sent continuously to 172.19.102.2 for five seconds.
考题
防止系统对ping请求做出回应,正确的命令是:()。A、echo0/proc/sys/net/ipv4/icmp_ehco_ignore_allB、echo0/proc/sys/net/ipv4/tcp_syncookiesC、echo1/proc/sys/net/ipv4/icmp_echo_ignore_allD、echo1/proc/sys/net/ipv4/tcp_syncookies
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单选题PING使用了()的Echo请求与Echo回答报文。A
ICMPB
ARPC
SNMPD
IP
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