Test Post: Visuals, Code, and Callouts

Primary image

Lab layout with capture nodes and telemetry windows

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Inline image with caption

Packet trace snapshot with highlighted rows — Figure 1. Packet trace overview used for quick triage.

Code blocks

# capture a 60s window of DNS queries
sudo tcpdump -i eth0 -s0 -w /tmp/dns.pcap port 53

from collections import Counter

with open("queries.txt") as f:
    counts = Counter(line.strip() for line in f)

for domain, hits in counts.most_common(10):
    print(hits, domain)

Callouts

Use this note style for stable guidance or assumptions.

Use the warning style for active risks or unsafe defaults.

Headings for TOC

Validation notes

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