正确答案: B
扩展的ACL核查数据包的源地址和目标地址和端口号
题目：扩展ACL和标准ACL的区别（）。
解析：B
查看原题
举一反三的答案和解析：
[多选题]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)
ARP
ICMP
解析：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.
[多选题]Regarding the extended ping command; which of the statements below are true?(Select all valid answer choices)
The extended ping command is available from privileged EXEC mode.
With the extended ping command you can specify the timeout value.
With the extended ping command you can specify the datagram size.
解析：解析：Explanation:
[单选题]为了查看路由器的E0端口上，是否挂接了访问权限表，应该使用的命令是（）
show interface e0
[单选题]帧中继环境中，CIR的含义是（）
保证线路速率
[多选题]Two stations on the Ezonexam LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network? (Choose all that apply)
A jam signal informs all devices that a collision occurred.
The devices that are involved in the collision stops transmitting for a short time.
The collision invokes a random back-off algorithm.
解析：解析：Explanation:
[单选题]At which layer of the OSI model does the protocol that provides the information displayed by the "show cdp neighbors" command operate?
Data link
解析：解析：Explanation:
