D. Preventing broadcast storms 15. Users arrive at the office after a weekend and the hosts that were shut down over the week- end are restarted but cannot access the LAN or Internet. Hosts that were not shut down are working fine. Where can the problem be? A. The DNS server more machines our network B. The DHCP server C. The proxy server D. The firewall 16. You need a device that can prevent your users from accessing certain websites. Which device should you install? A. Firewall B. IDS C. IPS D. Proxy server 17. Which device creates separate collision domains and a single broadcast domain? A. Hub B. Router C. Switch LOAP D. Modem * LDAPS 38