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| Section | Weight | Objectives |
|---|---|---|
| Wired and Wireless Infrastructure | 30% | - Design high-density wireless networks - Design wireless bridging (mesh) - Design radio management - Logical infrastructure requirements - Design for data, voice, video, location - Physical infrastructure requirements |
| Wireless Site Survey | 25% | - Collect design requirements and evaluate constraints - Pre-deployment site survey - Predictive site survey - Layer 1 site survey analysis - Planning tools and network metrics evaluation - Post-deployment site survey - Material attenuation and its design effects |
| WLAN High Availability | 20% | - Design AP high availability - Design controller high availability |
| Mobility | 25% | - Optimize client roaming - Validate mobility tunneling - Design mobility groups - Site Tags |
Eine breite Vielzahl von Cisco 300-110 Prüfungsfragen und Antworten aus ZertFragen sind logisch. Cisco 300-110 Zertifizierungsantworten aus ZertFragen sind gleich wie die in der realen Prüfung. Vor dem Kauf der Cisco 300-110 Echte Fragen können Sie kostenlose Demo zum Teil auf der Website www.ZertFragen.de herunterladen.
58. Frage
A university has three campus locations and the main data center. Each campus location has a Cisco Catalyst
9800-40 WLC that manages 600 APs. The data center has a Catalyst 9800-40 WLC, which serves as N+1 backup for each campus WLC. A consulting engineer must install four additional Catalyst 9800-40 WLCs to serve as high availability SSO pairs for each campus, but only two have been approved due to budget restrictions. Requirements: Data center WLC must always be available as N+1 backup, Campus1 WLC must operate with zero downtime, and in the event of multiple campus outages, the AP priority order is to support Campus3, Campus2, then Campus1. Which design approach must the consulting engineer take?
Antwort: B
Begründung:
This design scenario requires careful interpretation of the SSO pair function and AP priority semantics. The SSO requirement for Campus1 zero downtime means Campus1 ' s WLC must be paired in an SSO relationship - SSO provides hitless failover with no AP disassociation and no client reauthentication. The data center WLC, which must always remain available as N+1 backup for all campuses, is the logical SSO partner for Campus1 WLC. The SSO pair presents as a single logical entity, ensuring the data center WLC remains active and capable of serving as N+1 backup while simultaneously providing SSO for Campus1. The AP priority for the N+1 backup scenario defines the recovery order when the backup controller must simultaneously handle APs from multiple campuses. In Cisco WLC AP failover priority, priority 1 is Critical (highest). The stated recovery order - Campus3 first, Campus2 second, Campus1 last - maps to: Campus3 APs assigned priority 4 (Cisco ' s highest numeric value in the 4-tier system, equating to the highest service recovery priority in this context), Campus2 APs priority 2, and Campus1 APs priority 1 (lowest, recovered last). Option C correctly pairs the data center WLC with Campus1 WLC for SSO and assigns AP priorities in the correct descending recovery order. Reference: WLSD Study Guide - SSO High Availability, N+1 Redundancy, AP Failover Priority Design.
59. Frage
An engineer is designing a WLAN to support wireless VoIP handsets in an enterprise campus.
Which set of RF design targets must be met at the cell edge?
Antwort: A
Begründung:
Cisco's validated design targets for voice over WLAN require a stronger and cleaner signal than data-only deployments because voice is delay- and loss-sensitive and cannot tolerate retransmissions. The cell edge RSSI target is -67 dBm, which ensures the handset can sustain a high enough data rate to keep airtime consumption low. The SNR target is 25 dB, which provides sufficient margin above the noise floor for reliable demodulation without excessive retries. Cell overlap of 20% ensures the handset can find and associate to the next AP before the current signal degrades, allowing roams to complete without dropped audio. Data-only designs typically use -72 dBm and 20 dB SNR with 15% to 20% overlap, which is insufficient for voice. Overly aggressive targets such as -62 dBm with 35% overlap create unnecessary co-channel interference and increase cost.
60. Frage
A wireless engineer must design a WLAN for a university that requires outdoor Wi-Fi access. Which obstruction has the greatest effect on wireless signal propagation?
Antwort: C
Begründung:
In outdoor wireless deployments, foliage - particularly dense trees - represents the most significant and variable RF obstruction that engineers must account for during site survey and design. Trees are problematic for multiple compounding reasons: the high water content of living tissue causes signal absorption consistent with the principle that water is an effective absorber of 2.4 GHz and 5 GHz RF energy; the irregular branching structure causes multi-path scattering; and foliage density changes seasonally, meaning signal propagation characteristics measured during winter may differ substantially from summer readings when leaves are fully developed. A fully leafed deciduous tree can attenuate a 5 GHz signal by 6-15 dB depending on density and depth. Wind (Option A) causes only momentary mechanical movement of foliage and is not an obstruction itself. Rain (Option B) causes some absorption at higher frequencies but its effect at 2.4 GHz and
5 GHz in typical conditions is marginal compared to foliage. Poles (Option D) are thin structures with minimal RF impact. Outdoor surveys for university campuses must specifically account for tree locations, canopy density, and seasonal variation. Reference: WLSD Study Guide - Outdoor Wireless Design, Environmental RF Attenuation Factors, Outdoor Site Survey Considerations.
61. Frage
An educational organization recently deployed an anchored WLAN and has a high number of client connections at any given time that stream video. The wireless infrastructure includes two Cisco 9800 WLCs. To prevent web traffic being slow, an engineer must configure the deployment to prevent excessive fragmentation of the client data. Which configuration must the engineer apply?
Antwort: B
Begründung:
In an anchored WLAN deployment, client traffic is encapsulated within CAPWAP mobility tunnels between the foreign WLC (where the AP joins) and the anchor WLC (in the DMZ or designated network segment). This tunneling adds encapsulation overhead -- CAPWAP/mobility tunnel headers consume a portion of the available MTU on the transport path. When video streaming clients generate large TCP segments, these segments may exceed the effective MTU of the mobility tunnel path, causing IP fragmentation at the WLC or along the path to the anchor.
Fragmentation significantly degrades throughput and increases CPU overhead for high-volume video traffic. The correct solution is TCP MSS Clamping -- reducing the Maximum Segment Size value advertised in TCP SYN packets so that TCP endpoints negotiate a segment size remaining below the fragmentation threshold. The Cisco 9800 WLC supports TCP MSS adjustment, which intercepts TCP handshake packets and rewrites the MSS option to a value accounting for CAPWAP tunnel overhead.
62. Frage
A network engineer is configuring high availability on an access point. What is the maximum number of controllers that can be configured?
Antwort: B
Begründung:
When configuring high availability on a Cisco access point, the AP can be configured with a maximum of three controllers: a primary controller, a secondary controller, and a tertiary controller. This three- tier hierarchy defines the failover order -- the AP first attempts to join its primary controller, then the secondary if the primary is unavailable, and finally the tertiary if both the primary and secondary are unreachable. After exhausting all three configured options, the AP enters a discovery process to find any available controller. This three-controller configuration (primary, secondary, tertiary) allows network engineers to implement N+1 redundancy where critical APs can be directed to specific backup controllers in a deliberate sequence. Limiting the configuration to only 2 controllers (as stated in Option B which would be incorrect) would reduce redundancy options for environments with geographically distributed controllers requiring specific failover paths.
63. Frage
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