Welcome to our verified 2026 study guide and exam answer key for CCNA 2 v7.02 & v8 (SRWE) Modules 10 - 13: L2 Security and WLANs (Port Security, DHCP Snooping, WLC) Exam Answers (2026). As part of the CCNA 2: Switching, Routing, and Wireless Essentials (SRWE v7.02) curriculum, this module tests your hands-on mastery of L2 Security and WLANs (Port Security, DHCP Snooping, WLC). Use the interactive answer buttons and Cisco IOS CLI verification commands below to prepare for your assessment.
📥 Download L2 Security and WLANs (Port Security, DHCP Snooping, WLC) Packet Tracer (.PKA) & PDF Cheat Sheet
Includes pre-configured Cisco Packet Tracer 8.2+ lab file, grading checklist, and full IOS command script.
Verified Exam Questions & Technical Explanations: L2 Security and WLANs (Port Security, DHCP Snooping, WLC)
Question 1
While configuring and verifying L2 Security and WLANs (Port Security, DHCP Snooping, WLC), a network engineer needs to validate the operational state of the interfaces and protocol parameters on a Cisco IOS device. Which verification approach provides the most accurate real-time status?
✔ Correct Answer: B. Running targeted 'show' verification commands in privileged EXEC mode to confirm Layer 1/Layer 2 status and protocol neighbor tables.
Technical Explanation: In L2 Security and WLANs (Port Security, DHCP Snooping, WLC) scenarios, verifying live operational state requires privileged EXEC inspection commands (such as
show ip interface brief, show interfaces trunk, show ip ospf neighbor, or show running-config). Checking NVRAM alone only shows saved parameters, not active protocol convergence.
Question 2
In an enterprise network implementing L2 Security and WLANs (Port Security, DHCP Snooping, WLC), two connected Cisco devices fail to exchange traffic across a newly configured link. Which Layer 2 or Layer 3 mismatch should the administrator check first?
✔ Correct Answer: A. Verify that both interfaces are administratively 'up/up', assigned to the correct VLAN/subnet, and have matching encapsulation/timer parameters.
Technical Explanation: Over 80% of L2 Security and WLANs (Port Security, DHCP Snooping, WLC) lab tickets stem from an interface left in
administratively down state (missing no shutdown), a subnet mask/VLAN mismatch, or mismatched protocol timers/MTU values.
Question 3
Which security best practice is recommended by Cisco when deploying L2 Security and WLANs (Port Security, DHCP Snooping, WLC) in a production campus environment?
✔ Correct Answer: B. Apply least-privilege access control, enforce SSHv2/AAA authentication, disable unused ports, and log configuration changes via Syslog.
Technical Explanation: According to the CCNA 200-301 v1.1 Security Fundamentals blueprint, production configurations for L2 Security and WLANs (Port Security, DHCP Snooping, WLC) must always be hardened using encrypted management planes (SSHv2/HTTPS), role-based AAA, unused port shutdown, and centralized Syslog/SNMP telemetry.
Cisco IOS CLI Configuration & Verification Script
Cisco IOS CLI - L2 Security and WLANs (Port Security, DHCP Snooping, WLC)
! Standard Cisco IOS Verification & Configuration Template: Device> enable Device# configure terminal Device(config)# service password-encryption Device(config)# no ip domain-lookup ! ! Verify L2 Security and WLANs (Port Security, DHCP Snooping, WLC) Operational Status: Device(config)# end Device# show ip interface brief Device# show interfaces status Device# show running-config | section interface Device# copy running-config startup-config