AZ-802 Deploy and Manage AD DS Practice Question
Exhibit
C:\> repadmin /showrepl
Site-Branch-A\DC-02
DSA Options: IS_GC
Site Options: (none)
DSA object GUID: 4a2b3c4d-5e6f...
==== INBOUND NEIGHBORS =====================================
DC=contoso,DC=com
Site-HQ\DC-01 via RPC
DSA object GUID: 1a2b3c4d-...
Last attempt @ 2023-10-25 10:15:22 failed, result 1722 (0x6ba):
The RPC server is unavailable.Refer to the exhibit. You are troubleshooting a replication issue between the Head Office (Site-HQ) and a Branch Office (Site-Branch-A). Based on the output, what is the most likely cause of the failure?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A firewall is blocking RPC traffic or the source DC is offline.
The error code 1722 (The RPC server is unavailable) typically indicates a network connectivity issue or a service failure on the source domain controller. In the context of Active Directory replication, this often points to a firewall blocking RPC traffic, a failure of the DNS to resolve the source DC's name, or the RPC service being stopped.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The KCC has not yet generated a replication topology for the site.
Why it's wrong here
If the Knowledge Consistency Checker (KCC) had not generated a topology, there would be no inbound neighbor listed in the repadmin output. The fact that DC-01 is listed as a neighbor indicates that the topology exists, but the actual attempt to synchronize data over that connection is failing due to communication errors.
- ✗
There is a mismatch in the Site Link costs between the two sites.
Why it's wrong here
Site Link costs determine the preferred path for replication but do not cause RPC server unavailable errors. A cost mismatch might lead to replication taking an inefficient route, but it would not prevent the RPC service from being reached if a valid network path and proper firewall rules were in place.
- ✗
The destination domain controller lacks the Global Catalog role.
Why it's wrong here
The exhibit explicitly shows 'DSA Options: IS_GC' for DC-02, confirming it is a Global Catalog. Even if it were not a GC, the absence of the role would not cause an RPC error during standard domain partition replication. RPC errors are strictly related to the underlying communication layer between the two servers.
- ✓
A firewall is blocking RPC traffic or the source DC is offline.
Why this is correct
The 'RPC server is unavailable' error is a classic indicator that the destination DC cannot establish a network connection to the RPC endpoint on the source DC. This is frequently caused by network firewalls, the source server being powered off, or critical services like the RPC Endpoint Mapper being blocked or stopped.
Visual reference
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
This AZ-802 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-802 exam.