nerdexam
CompTIA

CAS-003 · Question #318

Given the following information about a company's internal network: User IP space: 192.168.1.0/24 Server IP space: 192.168.192.0/25 A security engineer has been told that there are rogue websites…

The correct answer is A. Use a protocol analyzer on 192.168.1.0/24 B. Use a port scanner on 192.168.1.0/24. Rogue websites hosted outside the proper server space are likely running on machines in the user subnet, so the engineer must scan and capture traffic on 192.168.1.0/24 to find unauthorized web servers.

Enterprise Security Operations

Question

Given the following information about a company's internal network:

User IP space: 192.168.1.0/24 Server IP space: 192.168.192.0/25 A security engineer has been told that there are rogue websites hosted outside of the proper server space, and those websites need to be identified. Which of the following should the engineer do? (Choose 2)

Options

  • AUse a protocol analyzer on 192.168.1.0/24
  • BUse a port scanner on 192.168.1.0/24
  • CUse an HTTP interceptor on 192.168.1.0/24
  • DUse a port scanner on 192.168.192.0/25
  • EUse a protocol analyzer on 192.168.192.0/25
  • FUse an HTTP interceptor on 192.168.192.0/25

How the community answered

(24 responses)
  • A
    50% (12)
  • C
    4% (1)
  • D
    25% (6)
  • E
    13% (3)
  • F
    8% (2)

Why each option

Rogue websites hosted outside the proper server space are likely running on machines in the user subnet, so the engineer must scan and capture traffic on 192.168.1.0/24 to find unauthorized web servers.

AUse a protocol analyzer on 192.168.1.0/24Correct

A protocol analyzer (packet capture) running on the 192.168.1.0/24 subnet will reveal HTTP and HTTPS traffic originating from hosts in that range, exposing unauthorized web servers that are serving content outside the designated 192.168.192.0/25 server space.

BUse a port scanner on 192.168.1.0/24Correct

A port scanner targeting 192.168.1.0/24 will enumerate open ports on each host, and any machines with ports 80 or 443 open are candidates for rogue web servers operating in the user address space rather than the authorized server subnet.

CUse an HTTP interceptor on 192.168.1.0/24

An HTTP interceptor on the user subnet captures outbound client browsing requests and responses, not the presence of servers hosting rogue sites on those same machines.

DUse a port scanner on 192.168.192.0/25

Scanning the legitimate server space 192.168.192.0/25 would only enumerate authorized servers; rogue websites are explicitly defined as hosted outside this range.

EUse a protocol analyzer on 192.168.192.0/25

A protocol analyzer on the authorized server subnet 192.168.192.0/25 monitors traffic to and from known servers and would not reveal rogue services running in the user IP space.

FUse an HTTP interceptor on 192.168.192.0/25

An HTTP interceptor on the server subnet 192.168.192.0/25 monitors communication with authorized servers and cannot identify unauthorized web servers operating in the 192.168.1.0/24 user range.

Concept tested: Identifying unauthorized web servers via port scanning and traffic capture

Source: https://nmap.org/book/man-port-scanning-basics.html

Topics

#rogue server detection#network scanning#protocol analysis#user subnet monitoring

Community Discussion

No community discussion yet for this question.

Full CAS-003 Practice