The FortiGate sniffer command diagnose sniffer packet any '...' 4 0 l uses verbosity level 4. According to the FortiOS Command Line Interface (CLI) Reference, verbosity level 4 is defined to "print header of packets with interface name."

The exhibit's output confirms this:

1. Interface name (A): The line begins with port1 out, explicitly showing the interface.

2. IP header (C): The summary line 10.0.1.254 -> 10.0.1.10 icmp: echo request contains information parsed from the IP and ICMP headers.

3. Ethernet header (B): The hexadecimal dump below the summary line displays the raw packet data, which starts with the Layer 2 Ethernet header (containing source and destination MAC addresses).

Therefore, all three are present in the output.

D. Application header: The sniffer does not parse or explicitly display application (Layer 7) headers in this mode. The protocol shown, ICMP, operates at the network layer.

E. Packet payload: Verbosity level 4 is specified to show only packet headers. While the payload is present within the raw hexadecimal dump, levels designed to show payload data (e.g., 2, 5, 6) also include an ASCII representation, which is absent here.

1. Fortinet FortiOS 7.4.0 CLI Reference: In the diagnose sniffer packet command documentation

the description for verbosity level 4 is "print header of packets with interface name." This supports that the primary information displayed includes headers and the interface name. (FortiOS 7.4.0 CLI Reference

p. 1985).

2. FortiGate Infrastructure 7.4 Study Guide: The troubleshooting chapter explains packet sniffing. It clarifies the verbosity levels

stating that level 4 adds the interface name to the header information provided by level 1. The guide distinguishes header-only levels (1

4) from levels that also display data/payload (2

3

5

6). (FortiGate Infrastructure 7.4 Study Guide

"Troubleshooting" chapter

section "Packet Sniffer").

3. Fortinet Document Library: The technical article "Troubleshooting Tip: Using the FortiOS built-in packet sniffer" details the output for each verbosity level. It shows that the hex dump is included in level 4

but the descriptive text emphasizes that its purpose is to display headers

contrasting with levels that are meant to display "header and data". (Document ID: FD33742).