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单选题Communication with a remote host has failed.  Which command is LEAST helpful in isolating the failure?（）A  ping RemoteHostName B  ping RemoteHostIPaddr C  nslookup RemoteHostName D  ping lo0

题目
单选题
Communication with a remote host has failed.  Which command is LEAST helpful in isolating the failure?（）
A

 ping RemoteHostName 

B

 ping RemoteHostIPaddr 

C

 nslookup RemoteHostName 

D

 ping lo0

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相似问题和答案

第1题：

When running a Windows server, which option is used with the ping command to convert numerical addresses to host names?()

A. -r

B. -a

C. -v

D. -n


参考答案：B

第2题：

There are 2 switches in the Testking LAN, with no routers. Ports 1, 2 & 3 are assigned to VLAN 1 in switch 1 and 2 and ports 4, 5 & 6 are assigned to VLAN 2 in both switches. These two switches are connected together via a trunked link.Which of the conditions below would verify trunk and VLAN operation?（）

A. Host 1 on VLAN 1 can ping Host 2 on VLAN 1

B. Host 1 on VLAN 1 can ping Host 4 on VLAN 2

C. Host 1 on VLAN 1 can not ping Host 2 on VLAN 1

D. Host 4 on VLAN 2 can not ping Host 1 on VLAN 1

E. Host 4 on VLAN 2 can ping Host 2 on VLAN 2


参考答案：A, D, E

第3题：

Regarding the extended ping command; which of the statements below are true?

(Select all valid answer choices)

A．The extended ping command is supported from user EXEC mode.

B．The extended ping command is available from privileged EXEC mode.

C．With the extended ping command you can specify the TCP and UDP port to be pinged.

D．With the extended ping command you can specify the timeout value.

E．With the extended ping command you can specify the datagram size.


正确答案：BDE
解析：Explanation:
The extended ping command works only at the privileged EXEC command line.
Some of the extended ping command values include the datagram size and timeout value as shown:

Datagram size [100]: Size of the ping packet (in bytes). Default: 100 bytes.

Timeout in seconds [2]: Timeout interval. Default: 2 (seconds). The ping is declared successful only if the ECHO REPLY packet is received before this time interval.

Incorrect Answers:
A. Regular pings are available in both user and privileged mode, but not extended pings.
C. Ports can not be specified.

第4题：

Which command can be used from a PC to verfy the connectivity between host that connect through path?（）

  • A、tracert address
  • B、ping address
  • C、arp address
  • D、traceroute address

正确答案:A

第5题：

Exhibit: Which of the following are true regarding the command output shown in the display (Choose two.)()。

A.There are at least two routers participating in the RIP process.

B.A ping to 192.168.168.2 will be successful.

C.A ping to 10.0.15.2 will be successful.

D.RtrA has three interfaces participating in the RIP process.


参考答案：A, C

第6题：

The Ezonexam network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test? (Choose two)

A．ARP

B．CDP

C．DHCP

D．DNS

E．ICMP


正确答案：AE
解析：Explanation:ARPfindsthehardwareaddressofahostfromaknownIPaddress.Here'showitworks:whenIPhasadatagramtosend,itmustinform.aNetworkAccessprotocol,suchasEthernetorTokenRing,ofthedestination'shardwareaddressonthelocalnetwork.(Ithasalreadybeeninformedbyupper-layerprotocolsofthedestination'sIPaddress.)IfIPdoesn'tfindthedestinationhost'shardwareaddressintheARPcache,itusesARPtofindthisinformation.ICMPworksattheNetworklayerandisusedbyIPformanydifferentservices.ICMPisamanagementprotocolandmessagingserviceproviderforIP.ItsmessagesarecarriedasIPdatagrams.RFC1256isanannextoICMP,whichaffordshosts'extendedcapabilityindiscoveringroutestogateways.Periodically,routeradvertisementsareannouncedoverthenetwork,reportingIPaddressesfortherouter'snetworkinterfaces.Hostslistenforthesenetworkinfomercialstoacquirerouteinformation.Aroutersolicitationisarequestforimmediateadvertisementsandmaybesentbyahostwhenitstartsup.

第7题：

A network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?()

A.ARP

B.CDP

C.DHCP

D.DNS

E.ICMP


参考答案：A, E

第8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.


参考答案：B

第9题：

While troubleshooting a connectivity issue from a PC you obtain the following information: Local PC IP address: 10.0.0.35/24 Default Gateway: 10.0.0.1 Remote Sever: 10.5.75.250/24 You then conduct the following tests from the local PC: Ping 127.0.0.1 – Successful Ping 10.0.0.35 – Successful Ping 10.0.0.1 – Unsuccessful Ping 10.5.75.250 – Unsuccessful What is the underlying cause of this problem?（）

  • A、A remote physical layer problem exists.
  • B、The host NIC is not functioning.
  • C、TCP/IP has not been correctly installed on the host.
  • D、A local physical layer problem exists.

正确答案:D

第10题：

A technician is attempting to use a command line prompt to continuously ping a remote server to check availability and reliability of the connection. Which of the following provides the ping command needed to continuously ping the system?（）

  • A、ping -a
  • B、ping -f
  • C、ping -r
  • D、ping -t

正确答案:D

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