What happens when you issue the ping 172.19.102.2 count 5 command?（）
第1题：
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.
第2题：
A. An information trap is sent to the SNMP server.
B. Informational and debug messages are logged to the syslog server.
C. All messages are sent to the logging host, where selections are made.
D. All messages from emergencies to informational are sent to the logging host.
第3题：
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
第4题：
What command verifies connectivity between two hosts by sending and receiving ICMP echo messages?（）
第5题：
A.ipsla1icmp-echo1.1.1.1 tos12
B.ipsla1icmp-echo1.1.1.1 tos96
C.ipsla1icmp-echo1.1.1.1 precedence3
D.ipsla1icmp-echo1.1.1.1 dscp12
第6题：
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.
第7题：
A. ICMP echo request
B. Information interrupt request
C. Timestamp reply
D. Source quench
E. None of the above
第8题：
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 reply
B．ICMP hold and ICMP send
C．ICMP request and ICMP reply
D．Echo off and Echo on
E．None of the above
第9题：
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
第10题：
Which configuration would make an IP SLA probe use a precedence value of 5？（）