Question

A system analyst receives multiple alerts from the systems reporting they cannot access the Internet. After tracking down the problem to the UTM IP address 120 136 1.1, the analyst notices the issues occurred with the latest threat feed, which updated the UTM blocklist IPv4 Blocklist Feed 172.10.0.0/16 23.221. 15.0/24 2.0.0.0/7 192.0.0.0/24 222.224.0.0/18 11.255.255.0/24 172.111.0.0/16 120.0.0.0/5 40.23. 100/24 Reviewing the above blocklist, which of the following is the MOST likely reason for the unwanted behavior on the UTM? OA The threat feed contained a mistyped subnet mask in the list, causing the UTM to block its own internal traffic processing. OB The network's public IP was entered as part of the external threat feed, causing the UTM to block only external-bound traffic. C. The network's private internal address range was included in the feed blocking internal traffic from leaving the network D The threat feed contained the IANA range reserved for experimental IP addresses, which the UTM was unable to process causing inbound and outbound traffic stoppage.

Answer 1

Answer: Option 'D'

In the blocked IP feed, There is an IP address 192.168.0.0/24. IETF has reserved this IP address (used for special purpose) for protocol assignments. If this IP address is blocked by any firewall then internet will no longer work due to stoppage of inbound and outbound traffic.