[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)

正确答案 ：AE

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]What are two characteristics of "store and forward" switching? (Select two answer choices)

正确答案 ：BC

The switch receives the complete frame. before beginning to forward it.

Latency through the switch varies with frame. length.

解析：解析：Explanation:

[单选题]The Ezonexam LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?

正确答案 ：C

Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

[多选题]In which Spanning-Tree states does a switch port learn MAC addresses? (Select two)

正确答案 ：CD

Forwarding

Learning

解析：解析：Explanation:

[单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP地址所在子网的子网号为（）

正确答案 ：B

192.168.80.64

[单选题]为了连接“帧中继”线路，网络中的路由器需要提供的端口类型为（）

正确答案 ：B

Serial

[单选题]A new Ezonexam switch is installed into an existing LAN and a new VTP trunk is set up with an existing switch. Which VLANs will be allowed on this new trunk?

正确答案 ：A

All defined VLANs are allowed on the trunk by default.

解析：解析：Explanation:

[单选题]地址转换NAT的优点是()

正确答案 ：B

地址转换可以缓解地地址短缺的问题

[单选题]关于PPP和HDLC的说法中，错误的是（）

正确答案 ：D

在配置ISDN时，广域网协议不能封装成PPP，但可以封装成HDLC

[单选题]查看E0端口配置信息的命令是：()

正确答案 ：D

show interfacee0

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