DHCP snooping on Cisco Nexus 1000V Series Switches acts like a firewall between untrusted hosts and trusted DHCP servers by doing which of these？ （） [" validates DHCP messages received from untrusted sources and filters out invalid response messages from DHCP servers"," intercepts all ARP requests and responses on untrusted ports"," builds and maintains the DHCP snooping binding database， which contains information about untrusted hosts with leased IP addresses"," uses the DHCP snooping binding database to validate subsequent requests from untrusted hosts"," limits IP traffic on an interface to only those sources that have an IP-MAC address binding table entry or static IP source entry"]
什么叫地震波的振动图？什么叫地震波的波剖面？
Switch R1 is configured to use the VLAN Trunking Protocol （VTP）. What does R1 advertise in its VTP domain？（） ["The VLAN ID of all known VLANs，the management domain name，and the total number of trunk links on the switch.","The VLAN ID of all known VLANs，a 1-bit canonical format （CF1 Indicator），and the switch configuration revision number.","The management domain name，the switch configuration revision number，the known VLANs， and their specific parameters.","A 2-byte TPID with a fixed value of 0x8100 for the management domain number，the switch configuration revision number，the known VLANs，and their specific parameters.","None of the other alternatives apply."]
德国爱因斯坦天文台的设计者是（） ["荷莱因","穆特修斯","保罗·格林哈尔希","门德尔松"]
Which of the following statements is correct regarding PIM Sparse Mode operations？（） ["It does not support all underlying unicast routing protocols like GBP","It supports shared trees only assuming all hosts want the multicast traffic","Receivers are registered with RP by their first-hop router","Receivers are joinedto the Shared Tree（rooted the rp ）by their local Designated Router（DR）","From the RP，traffic flows down a Source Tree to each receiver"]
靶器官
