Select ALL accurate descriptions of these Network Mapper (Nmap) options and outputs.

### Why this is right - **A** is correct: `-PE` uses Internet Control Message Protocol (ICMP) echo requests for host discovery. - **B** is correct: `-sU` probes User Datagram Protocol (UDP) services. - **C** is correct: `-oN` writes scan results in normal text format to the named file. ### The concept Nmap options select scan methods, discovery behavior, timing, and output format. These functions are separate: a timing option changes scan pacing, while an output option saves results. Because scans send traffic, use them only on approved targets and within the approved scope. ### The other options - **D. `-T4` saves results in Extensible Markup Language (XML) format.**: `-T4` is a timing template. The `-oX` option is used for XML output. ### Terms - **Nmap**: Network Mapper. A network discovery and scanning tool. - **ICMP**: Internet Control Message Protocol. Carries network control messages such as echo requests. - **UDP**: User Datagram Protocol. A transport protocol used by some network services. - **XML**: Extensible Markup Language. A structured data format. ### Remember Keep scan method, timing, and output options separate: `-sU`, `-T4`, and `-oX` do different jobs.