Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true?（） [" Router C will use ICMP to inform Host 1 that Host 2 cannot be reached."," Router C will use ICMP to inform Router B that Host 2 cannot be reached."," Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached."," Router C will send a Destination Unreachable message type."," Router C will send a Router Selection message type."," Router C will send a Source Quench message type."]
受教育权是我国宪法规定的公民的基本权利之一，它是指依照法律规定，公民在受教育方面可以作为或不作为，或要求他人为其受教育权而作为或不作为的能力或资格。
利他行
Refer to the exhibit. Which three statements accurately describe this GLBP topology？ （Choose three.）（） [" Router A is responsible for answering ARP requests sent to the virtual IP address."," If Router A becomes unavailable， Router B will forward packets sent to the virtual MAC address of Router A"," If another router were added to this GLBP group， there would be two backup AVGs"," Router B is in GLBP listen state."," Router A alternately responds to ARP requests with different virtual MAC addresses."," Router B will transition from blocking state to forwarding state when it becomes the AVG"]
试述传染病的基本特征。
简述班级组织的改造。
