Cisco Question 300-110 Explanations: Designing Cisco Wireless Networks - VCEDumps 100% Safe Shopping Experience

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Cisco 300-110 Exam Syllabus Topics:

SectionWeightObjectives
WLAN High Availability20%- Design controller high availability
- Design AP high availability
Wired and Wireless Infrastructure30%- Design for data, voice, video, location
- Design wireless bridging (mesh)
- Design radio management
- Physical infrastructure requirements
- Logical infrastructure requirements
- Design high-density wireless networks
Wireless Site Survey25%- Post-deployment site survey
- Planning tools and network metrics evaluation
- Pre-deployment site survey
- Collect design requirements and evaluate constraints
- Predictive site survey
- Material attenuation and its design effects
- Layer 1 site survey analysis
Mobility25%- Site Tags
- Validate mobility tunneling
- Optimize client roaming
- Design mobility groups

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Cisco Designing Cisco Wireless Networks Sample Questions (Q78-Q83):

NEW QUESTION # 78
A customer has two Cisco Catalyst 9800 Series WLCs named WLC-A and WLC-B in an N+1 configuration with the same WLANs but different Layer 3 interfaces for each WLC, and APs in local mode. WLC-A manages Building A APs and WLC-B manages Building B APs. The customer wants users to remain connected and retain their session state including the IP address when moving between buildings. How must this requirement be incorporated into the design?

Answer: A

Explanation:
The requirement for users to retain their session state and IP address when roaming between buildings managed by different WLCs is a Layer 3 roaming scenario. In Cisco ' s wireless architecture, IP address preservation across controller boundaries is achieved through inter-controller mobility - specifically the foreign-anchor mobility tunnel mechanism. When a client roams from Building A (WLC-A) to Building B (WLC-B), WLC-B becomes the foreign controller and WLC-A becomes the anchor controller. WLC-B tunnels the client ' s traffic back to WLC-A, allowing the client to retain its original IP address even while physically associated to an AP managed by WLC-B. This requires a mobility tunnel between WLC-A and WLC-B with both controllers configured in the same mobility group name - the group name is the trust identifier that permits the mobility tunnel and anchor-foreign relationship to form. Without the same group name, the controllers will not form a trusted mobility peer relationship. AP groups (Option C) control SSID and VLAN assignments per AP cluster but have no impact on inter-controller roaming. HA cluster configuration (Option B) creates SSO redundancy, not roaming capability between separate N+1 controllers.
Redundancy port connection (Option D) is used for SSO keepalive and state sync, not mobility tunneling.
Reference: WLSD Study Guide - Inter-Controller Mobility, Mobility Tunnels, Layer 3 Roaming and IP Address Preservation.


NEW QUESTION # 79
A customer has two Cisco WLCs configured in a SSO cluster. The wireless network supports a large warehouse. The customer purchases new iPads to replace legacy scanners. Both devices connect to a single SSID named Scanning by using WPA2 Personal. The customer wants to use a standards-based method for fast roaming on the new iPads. Which approach meets the scanner requirement and still supports the legacy scanners?

Answer: C

Explanation:
The design challenge is enabling IEEE 802.11r Fast BSS Transition for the new iPads (the standards- based fast roaming method) while maintaining backward compatibility for legacy RF scanners that may not support 802.11r. The SSID uses WPA2 Personal (PSK), not 802.1X enterprise authentication -- therefore the correct Fast Transition variant is FT PSK (pre-shared key), not FT 802.1X (Options A and B). The critical configuration parameter is setting Fast Transition to Adaptive mode rather than mandatory. Adaptive mode is a Cisco feature that allows the AP and SSID to support both 802.11r- capable clients (which will use FT PSK for fast roaming) and non-802.11r legacy clients (which will use the standard pre-FT roaming process). In Adaptive mode, legacy scanners that cannot negotiate 802.11r during association will fall back transparently to standard roaming, while the new iPads leverage FT PSK for minimal-interruption handoffs. If Fast Transition is set to mandatory, legacy clients that do not support 802.11r will fail to associate entirely. Option C uses optimized roaming globally, which is a different mechanism and does not address the iPads' specific need for a standards-based fast roaming solution.


NEW QUESTION # 80
How are mobility groups created, excluding mobility anchors?

Answer: C

Explanation:
Mobility groups are created by configuring each Wireless LAN Controller (WLC) to use the same mobility domain name (mobility group name) and defining each WLC as a peer in the static mobility members list of every other WLC in the group. This bidirectional configuration establishes the trusted peer relationship and enables WLCs to exchange client information, security credentials, and state data for seamless roaming. The same mobility group name on all WLCs creates a shared identity; the static peer list defines which controllers are trusted mobility partners and provides their management IP addresses and MAC addresses for tunnel establishment.


NEW QUESTION # 81
The wireless team must configure a new voice SSID for optimized roaming across multiple WLCs with Cisco 8821 phones. Which two settings accomplish this goal? (Choose two.)

Answer: B,C

Explanation:
For optimized roaming across multiple Wireless LAN Controllers (WLCs) with Cisco 8821 IP phones, two critical settings must be configured. First, configuring mobility groups between WLCs (Option A) allows for seamless inter-controller roaming by establishing mobility tunnels between controllers, enabling them to share client security context, preventing re-authentication when a phone roams from an AP on one WLC to an AP on another. Second, using Cisco Centralized Key Management (CCKM) for authentication (Option B) reduces the time required for re- authentication during roaming from a full 802.1X exchange to a single-message re-key process.
CCKM stores the wireless security keys at the WLC level, enabling rapid key re-derivation during roaming without contacting the RADIUS server.


NEW QUESTION # 82
What happens to an AP when a flex profile name is changed in a site tag?

Answer: D

Explanation:
On the Cisco Catalyst 9800 IOS XE WLC platform, the tag-based configuration model uses site tags to associate APs with specific profiles including a flex profile and an AP join profile. The site tag is a fundamental binding element -- when any component of a site tag is modified, including renaming the flex profile associated with that tag, the WLC treats this as a material configuration change requiring the AP to re-evaluate its operational parameters. Specifically, the AP must disconnect its existing DTLS (Datagram Transport Layer Security) control plane tunnel to the WLC and re-establish it. This DTLS session disconnect and rejoin cycle is equivalent to a full AP rejoin: CAPWAP discovery, DTLS handshake, join request, configuration download, and image verification. Client service is interrupted on the affected AP during this process.


NEW QUESTION # 83
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