Active Directory Trust Types

Here are three relatable analogies for each Active Directory trust type


1. Parent-Child Trust

a. Family Tree:
Like a parent trusting their child—if you’re born into the family, you get access to the fridge and the Wi-Fi password by default.

b. Automatic Club Membership:
When you join a parent club, you’re automatically in all its sub-clubs—no extra registration needed.

c. Elevator Access:
Every child on a building floor gets a parent’s elevator pass, riding up or down without security checks.



2. Tree-Root Trust

a. Connecting Neighboring Campuses:
When two school campuses under the same university want to share resources, they connect main offices so all students can check out books from any library.

b. Superheroes Forming Alliances:
The Justice League and the Avengers both operate under the larger “Superhero Universe.” Their base domains share resources easily—when needed, heroes join forces.

c. Regional Train Pass:
A ticket for one route automatically includes transfers to other routes within the regional train network—no extra ticket necessary.



3. Forest Trust

a. Merging Companies:
When two companies merge, their employees get access to each other’s lunchroom—though you still need ID for that third-party supplier.

b. Nationwide Library Network:
Local libraries team up, letting members borrow books from any across the country—but only if their libraries have agreed to share.

c. Cross-Universe Deals:
DC Comics and Marvel agree the Flash can visit Stark Tower, but Flash can’t just go into Disney unless more deals are made.



4. Shortcut Trust

a. Secret Tunnel in a Castle:
Instead of walking the long hallway through every room, shortcut trusts let you take the “hidden tunnel” straight to the treasure room.

b. VIP Lane at Security:
Normally, you’d wait in line to check your bags, but with a shortcut, you skip to the front for faster clearance.

c. Express Delivery Bypass:
Rather than following the entire postal chain, mail gets a direct priority route—reaching its destination much quicker.



5. External Trust

a. Invite-Only Party:
Your office shares secrets with a friend at a rival company, but not with their entire company—one-on-one, not one-to-many.

b. Guest Wi-Fi Password:
You give the guest Wi-Fi only to a specific vendor, not to every visitor—access is limited and temporary.

c. Special Trading Agreement:
Two towns negotiate a deal so their markets can trade, but it doesn't mean either town can trade with the other towns nearby.



6. Realm Trust

a. Foreign Exchange Student Program:
A Windows school sets up trust with a Linux school so students can attend classes in both—cross-platform compatibility.

b. Translator at Diplomatic Summit:
Participants speak different languages, but with a realm trust (the translator), everyone communicates securely.

 c. Universal Adapter Plug:
You can plug your Windows device into a Kerberos-powered outlet overseas thanks to that handy realm trust