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单选题
What is a valid option when using the ping command?（）
A
packet loss
B
packet size
C
CRC
D
TCP port
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When does the E－series router start monitoring DHCP traffic using the DHCP External function?()
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What is the purpose using the traceroute command?()
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Which command is used to debug a ping command?()
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Which command is used to debug a ping command?（）A、debug icmpB、debug ip icmpC、debug tcpD、debug packet
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Which action does the ping 172.18.1.1 size 5 command perform?（）A、It sends only five ping requests to the 172.18.1.1 destination.B、It sends a continuous ping with a packet length of five bytes to the 172.18.1.1 destination.C、It sends five rapid ping requests to the 172.18.1.1 destination.D、It sends a continuous rapid ping with a packet length of five bytes to the 172.18.1.1 destination.
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What is a valid option when using the ping command?（）A、packet lossB、packet sizeC、CRCD、TCP port
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When does the E-series router start monitoring DHCP traffic using the DHCP External function?（）A、When the discovery packet enters the router from the DHCP client.B、Only when the offer packet enters the router from the DHCP server.C、When the acknowledge packet enters the router from the DHCP server.D、Only when the discovery packet leaves the router going to the DHCP server.
考题
单选题Which command is used to debug a ping command?（）A
debug icmpB
debug ip icmpC
debug tcpD
debug packet
考题
单选题When referring to the data structures of a packet, what is the proper term to refer to a single unit of TCP data at the transport layer?当提及一个数据包结构时，以下哪项可以表示一个TCP包在传输层的单个数据单元？（）A
TCP segment.TCP段B
TCP packet.TCP包C
TCP frame.TCP帧D
TCP datagram.TCP报文
考题
单选题What is the purpose using the traceroute command?（）A
to map all the devices on a network.B
to display the current TCP/IP configuration values.C
to see how a device MAC address is mapped to its IP address.D
to see the path a packet will take when traveling to a specified destination.E
to display the MTU values for each router in a specified network path from source to a destination.
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单选题A web server is running correctly but sending a RST packet to any client trying to connect using HTTP on TCP port 80. Which of the following tools should be used to determine the listening port of the web server?（）A
RouteB
IfconfigC
NetstatD
Nslookup
考题
单选题What is a valid option when using the ping command?（）A
packet lossB
packet sizeC
CRCD
TCP port
考题
单选题For which network anomaly does Junos provide a SCREEN?（）A
a telnet to port 80B
a TCP packet with the SYN and ACK flags setC
an SNMP getnext requestD
an ICMP packet larger than 1024 bytes
考题
单选题Which of the following options would best help to reduce packet fragmentation for a TCP application transferring large amounts of data between servers across a path of multiple networks？（）A
Adjust Path MTU attributes， using the no command.B
Adjust the status queue size on the adapters， using the chdev command.C
Adjust ipforwarding to enabled， using the no command.D
Adjust tcp_maxburst to enabled， using the no command.
考题
单选题Which action does the ping 172.18.1.1 size 5 command perform?（）A
It sends only five ping requests to the 172.18.1.1 destination.B
It sends a continuous ping with a packet length of five bytes to the 172.18.1.1 destination.C
It sends five rapid ping requests to the 172.18.1.1 destination.D
It sends a continuous rapid ping with a packet length of five bytes to the 172.18.1.1 destination.
考题
单选题When does the E-series router start monitoring DHCP traffic using the DHCP External function?（）A
When the discovery packet enters the router from the DHCP client.B
Only when the offer packet enters the router from the DHCP server.C
When the acknowledge packet enters the router from the DHCP server.D
Only when the discovery packet leaves the router going to the DHCP server.
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