Several PCs in a TVET school suddenly get addresses in 192.168.0.x with an unknown gateway, instead of the school's 10.20.0.x range. A student has plugged a home router into a wall socket. Which switch feature prevents this?
Plusieurs PC d'une école TVET obtiennent soudain des adresses en 192.168.0.x avec une passerelle inconnue, au lieu de la plage 10.20.0.x de l'école. Un élève a branché un routeur domestique sur une prise murale. Quelle fonction du commutateur empêche cela ?
Answers
APort mirroring to copy traffic to a monitorLa recopie de port pour copier le trafic vers une sonde
BSpanning Tree Protocol to block switching loopsLe protocole Spanning Tree pour bloquer les boucles de commutation
CDHCP snooping, trusting only the server's portLa surveillance DHCP (DHCP snooping), qui ne fait confiance qu'au port du serveur
DLink aggregation to bond several cables togetherL'agrégation de liens pour regrouper plusieurs câbles
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