ACA Study Guide 2026
Everything you need to pass the ACA exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 ACA Exam Format at a Glance
📚 ACA Topics to Study (44)
✍️ Sample ACA Questions & Answers
1. Which protocol dynamically assigns IP addresses, subnet masks, gateways, and DNS server information to hosts?
DHCP (Dynamic Host Configuration Protocol) automatically provides hosts with IP addressing parameters, eliminating the need for manual static configuration.
2. What is the broadcast address for the subnet 192.168.10.64/26?
The /26 subnet starting at 192.168.10.64 has a block size of 64; the broadcast address is 192.168.10.64 + 63 = 192.168.10.127.
3. What is the loopback address in IPv4, and what is it used for?
The IPv4 loopback address 127.0.0.1 (range 127.0.0.0/8) routes traffic back to the local host, allowing software to test network stack functionality.
4. What is the purpose of IPSec tunnels in Aruba SD-WAN deployments?
Aruba SD-WAN uses IPSec tunnels to encrypt traffic traversing public Internet connections, creating a secure overlay network that protects branch communications regardless of the underlying transport.
5. Which authentication framework is most commonly used for enterprise wireless networks to authenticate users against a RADIUS server?
802.1X with EAP (Extensible Authentication Protocol) is the standard enterprise authentication framework that integrates with RADIUS servers.
6. Aruba's 802.11ax (Wi-Fi 6) access points belong to which product series?
The Aruba AP-500 series (e.g., AP-505, AP-515, AP-535) are Wi-Fi 6 (802.11ax) access points designed for high-density enterprise environments.