imperial.ac.uk

Readiness by lane

Green: imperial.ac.uk. Thin bar: Education & Online Learning peer median.

Priority fixes for imperial.ac.uk

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Accelerate

   HTTP/2 negotiated

   Observed: The TLS handshake selected HTTP/1.1 instead of HTTP/2.

   Why it matters: HTTP/2 sends many files over one connection, which speeds up pages with lots of images, styles and scripts.

   What to do: Enable HTTP/2 on your CDN or server. Most CDNs do this by default.

   On Amazon CloudFront: Choose HTTP/2 (or HTTP/2 and HTTP/3) as supported versions on the distribution.

   80% of Education & Online Learning peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.

   Guide: CDN Guide for Website Owners

2. Priority 2 · Harden

   DMARC policy enforces quarantine or reject

   Observed: The DMARC policy for imperial.ac.uk was p=none, which asks receivers to take no action on failing mail.

   What to do: Publish DMARC with p=none and a reporting address first, fix any legitimate senders that fail SPF or DKIM alignment, then move to quarantine and finally reject.

   36% of Education & Online Learning peers do this.

   Guide: A Practical Website Health Check for Owners

3. Priority 3 · Accelerate

   No render-blocking scripts in <head>

   Observed: The homepage <head> loaded 3 external scripts without async or defer.

   What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.

   42% of Education & Online Learning peers do this.

   Guide: Control Third-Party Scripts Before They Control Your Page

4. Priority 4 · Accelerate

   HTTP/3 advertised

   Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.

   What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.

   On Amazon CloudFront: Select HTTP/3 in the distribution's supported HTTP versions.

   25% of Education & Online Learning peers do this.

   Guide: CDN Guide for Website Owners

What imperial.ac.uk already does well

Practices fewer than half of Education & Online Learning peers use.

• DNSSEC signedDNSSEC delegation (DS record) present.8.1% of peers
• Nameservers spread across providersNameservers spread across more than one operator.13% of peers
• Content Security Policy presentContent-Security-Policy present.25% of peers

What we saw

Homepage checked

https://www.imperial.ac.uk/

Homepage response

HTTP 200

TLS

TLSv1.3

Certificate

Let's Encrypt, 89-day validity, expiring 2026-11-23

CDN or edge

Amazon CloudFront

DNS operators

2 self-run or other nameserver domains

HSTS

max-age 365 days, includeSubDomains, preload

DMARC policy

p=none

Homepage HTML

56 KB, gzip

Images on homepage

8 (jpg 41)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other Education & Online Learning sites

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• estacio.br77
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• infoedu.uz77
• maktabkhooneh.org77

Education & Online Learning readiness benchmark