2026 Actual Cisco 300-110 Dumps, Updated Exam Questions for Guaranteed Pass

300-110 free sample questions and answers

Cisco 300-110 practice quiz with correct answers for search indexing.

1. Question 1

   Which issue occurs when wireless access points transmit by using the highest power level in a building that has brick walls?

   Ahidden node
   

   Bwideband interference
   

   Creflection
   

   Dnarrowband interference
   

   Correct answer: A

   The hidden node problem is a classic RF design flaw that emerges when APs transmit at excessive power levels relative to the attenuation characteristics of the environment. In a brick-walled building, AP signals penetrate walls with significant attenuation. When an AP transmits at maximum power, its signal propagates far beyond the intended cell boundary and reaches client devices that may be physically near other APs but unable to detect the original transmitting AP due to wall attenuation between them. These clients can hear the distant AP's signal but cannot hear each other --- making them hidden from one another. This leads to simultaneous transmissions, frame collisions at the AP receiver, and dramatic throughput degradation. The 802.11 CSMA/CA mechanism depends on all stations being able to sense the medium before transmitting; hidden nodes defeat this mechanism entirely. The WLSD curriculum consistently identifies excessive AP transmit power in high-attenuation environments as a primary cause of hidden node conditions. The solution is to reduce AP transmit power so that cell sizes remain appropriate for the physical environment. Reference: WLSD Study Guide --- RF Design Fundamentals, Hidden Node Problem, Transmit Power and Cell Size Optimization.

   
   

2. Question 2

   During a post-deployment site survey, issues are found with non-Wi-Fi interference. What should the engineer use to identify the source of the interference?

   ANetwork analysis module
   

   BWireless intrusion prevention
   

   CWireshark
   

   DCisco spectrum expert
   

   Correct answer: D

   Cisco Spectrum Expert is a dedicated spectrum analysis tool designed to identify and analyze non-Wi-Fi interference sources at Layer 1. During a post-deployment site survey, it can detect interference from various devices such as cordless phones, Bluetooth devices, microwave ovens, video cameras, and other unlicensed RF emitters. The tool provides a visual representation of the RF environment across the frequency spectrum, allowing engineers to pinpoint the exact source of interference and characterize it by duty cycle, frequency, and interference pattern. A network analysis module (Option A) operates at Layer 2 and above, unable to detect non-802.11 RF emissions. Wireless intrusion prevention (Option B) detects rogue APs and 802.11 attacks but not Layer 1 RF noise. Wireshark (Option C) is a packet capture tool for Layer 2-7 analysis and cannot detect non-Wi-Fi RF energy. Reference: WLSD Study Guide --- Layer 1 Spectrum Analysis, Post-Deployment Survey, Non-Wi-Fi Interference Identification.

   
   

3. Question 3

   A wireless engineer must design a backhaul link. The engineer has a mesh access point that has a wired connection back to the infrastructure. What must be changed in the AP role before a change is made in the AP mode?

   Amonitor
   

   BRAP
   

   Cbridge
   

   Dlocal
   

   Correct answer: B

   In Cisco mesh networking architecture, access points are classified into two primary roles: Root Access Points (RAP) and Mesh Access Points (MAP). A RAP is an access point that maintains a wired Ethernet backhaul connection back to the network infrastructure, while a MAP operates wirelessly, relying on mesh backlinks to upstream RAPs. When an engineer needs to change an AP mode --- such as switching to bridge mode to extend the mesh --- the AP role must first be defined correctly. The AP must be designated as a RAP before any mode-level configuration changes are applied. This sequencing is critical because the AP role defines the fundamental backhaul path; changing the mode without first establishing the role results in misconfiguration and potential connectivity loss. The RAP communicates directly with the wired infrastructure via its Ethernet port, making it the gateway for all downstream MAPs in the mesh topology. Options A (monitor), C (bridge), and D (local) refer to AP modes, not roles, and cannot be configured until the role is properly defined. Reference: WLSD Study Guide --- Mesh Networking Fundamentals, Outdoor Wireless Design, AP Role and Mode Configuration.

   
   

4. Question 4

   A wireless engineer is using Ekahau site survey to validate that an existing wireless network is operating as expected. Which type of survey should be used to identify end-to-end network performance?

   AGPS assisted
   

   BSpectrum analysis
   

   CPassive
   

   DActive ping
   

   Correct answer: D

   An active ping survey is used to validate network performance by sending and receiving data packets to measure end-to-end network performance, including latency, packet loss, and throughput. Ekahau site survey tools can perform active ping surveys to test the connectivity and performance of the wireless network while the surveyor walks the floor plan, producing a geographically correlated map of network performance metrics. This differs fundamentally from passive surveys, which only measure signal strength from beacons. A GPS-assisted survey (Option A) is used for large outdoor areas to automate location tracking. Spectrum analysis (Option B) identifies Layer 1 RF conditions but does not measure network performance. A passive survey (Option C) measures RSSI and SNR but does not test actual data connectivity or throughput. Active ping is the correct tool for validating that the network delivers the expected end-to-end service levels. Reference: WLSD Study Guide --- Ekahau Survey Types, Active Survey Methodology, Post-Deployment Validation.

   
   

5. Question 5

   An engineer must configure the virtual IP address on multiple controllers in a mobility group. Which rule must the engineer follow to ensure proper roaming?

   AEnsure that the DNS entry is tied to the virtual IP address of the WLC.
   

   BUse a unique IP address for each WLC.
   

   CEnsure that the DNS Host Name field is defined.
   

   DUse the same IP address for each WLC.
   

   Correct answer: D

   In a Cisco wireless mobility group, all Wireless LAN Controllers (WLCs) must be configured with the same virtual IP address to ensure proper roaming. The virtual IP address is a Layer 3 construct used by wireless clients during the DHCP renewal process when roaming between subnets managed by different WLCs. All WLCs in the same mobility group use the same virtual IP (typically from the unused 1.1.1.0/24 or similar non-routable space) so that clients receive consistent DHCP server responses regardless of which controller they are associated with. If different virtual IP addresses were used (Option B), clients roaming between controllers would experience DHCP failures during inter-controller roaming because the DHCP server address seen by the client would change. Options A and C relate to DNS hostname configuration, which is useful for AP discovery but does not affect the roaming behavior of client devices. The virtual IP address consistency across all mobility group members is a fundamental requirement for seamless inter-controller roaming. Reference: WLSD Study Guide --- Mobility Group Configuration, Virtual IP Address, Inter-Controller Roaming Requirements.