HTTP Headers: it.wikipedia.org

date
server
x-content-type-options
content-language
accept-ch
last-modified
content-type
content-encoding
age
accept-ranges
x-cache
x-cache-status
server-timing
strict-transport-security
report-to
nel
set-cookie
x-client-ip
cache-control
content-security-policy
content-security-policy-report-only
vary
content-length
x-request-id
x-analytics

Strict-Transport-Security (HSTS) forces browsers to use HTTPS. Content-Security-Policy (CSP) prevents XSS attacks by controlling which resources can load. X-Content-Type-Options stops MIME-type sniffing. X-Frame-Options blocks clickjacking by preventing iframe embedding.

it.wikipedia.org's security score of 60/100 reflects how many of these protective headers are configured. Higher scores indicate better defense against common web attacks.