Wireless Questions
Here you will find answers to Wireless Questions
Question 1
Which two of these are functions of an access point in a Split MAC Network Architecture? (Choose two)
A. EAP Authentication
B. MAC layer encryption or decryption
C. 802.1Q encapsulation
D. Process probe response
Answer: B D
Question 2
Lightweight access points are being deployed in remote locations where others are already operational.
The new access points are in a separate IP subnet from the wireless controller. OTAP has not been enabled at any locations.
Which two methods can the AP use to locate a wireless controller? (Choose two)
A. local subnet broadcast
B. NV-RAM IP address
C. DHCP
D. primary, secondary, tertiary
E. DNS
F. master
Answer: C E
Question 3
Which two of the following statements represent a preferred wireless LWAPP implementation? (Choose two)
A. verify open ports for:
Layer 2 LWAPP on ethertype OxABAB
Layer 3 LWAPP on TCP 12222 and TCP 12223
B. verify open ports for:
Layer 2 LWAPP on ethertype OxBBBB
Layer 3 LWAPP on UDP 12222 and UDP 12223
C. verify open ports for:
Layer 2 LWAPP on ethertype OxBABA
Layer 3 LWAPP on UDP 12222 and TCP 12223
D. use of Layer 3 LWAPP is preferred over Layer 2 LWAPP
E. use of Layer 2 LWAPP is preferred over Layer 3 LWAPP
Answer: B D
Question 4
A lightweight access point is added to a working network. Which sequence will it use to associate itself with a wireless LAN controller?
A. master, primary, secondary, tertiary, greatest AP capacity
B. greatest AP capacity, primary, secondary, tertiary, master
C. primary, secondary, tertiary, master, greatest AP capacity
D. primary, secondary, tertiary, greatest AP capacity, master
Answer: C
Question 5
Which three of these describe the best practice for Cisco wireless outdoor Mesh network deployment? (Choose three)
A. RAP implemented with 20 to 32 MAP nodes
B. RAP implemented with 20 or fewer MAP nodes
C. mesh hop counts of 8 to 4
D. mesh hop counts of 4 or fewer
E. client access via 802.11 b/g and backhaul with 802.11 a
F. client access via 802.11 a and backhaul with 802.11 b/g
Answer: B D E
Question 6
Which two of these represent a best practice implementation of a Split MAC LWAPP deployment in a Cisco Unified Wireless Network? (Choose two)
A. Each wireless client authentication type maps to a shared SSID which in turn maps to a common shared VLAN.
B. Each wireless client authentication type maps to a unique SSID which in turn maps to a unique VLAN.
C. Each wireless client authentication type maps to a unique SSID which in turn maps to a common shared VLAN.
D. 802.1 Q trunking extends from the wired infrastructure to the access point for translation into SSID(s).
E. 802.1 Q trunking extends from the wired infrastructure to a wireless LAN controller for translation into SSID(s).
F. 802.1 Q trunking extends from the wired infrastructure to a wireless LAN controller.
Then the 802.1 Q packet is encapsulated in LWAPP and sent to the access point for transmission over the SSID(s).
Answer: B E
Question 7
Which two of these are required for wireless client mobility deployment when using a Cisco Unified Wireless Network? (Choose two)
A. assigned master controller
B. matching mobility group name
C. matching RF group name
D. matching RF power
E. matching security
F. matching RF channel
Answer: B E
Question 8
Which two wireless attributes should be considered during a wireless site survey procedure? (Choose two)
A. encryption
B. channel
C. authentication
D. power
E. SSID
Answer: B D
Question 9
Which two statements best describe Cisco Wireless LAN Guest Access in a Cisco Unified Wireless Network? (Choose two)
A. Dedicated guest VLANs are extended throughout the network to the access points for path isolation.
B. Dedicated guest VLANs are only extended to the wireless controllers in the network to ensure path isolation.
C. Dedicated guest access in the DMZ extends from the origination to the termination controllers without dedicated guest VLANs.
D. Guest tunnels can originate and terminate on any wireless controller platform.
E. Guest tunnels have limitations on which wireless controllers can originate the tunnel.
F. Guest tunnels have limitations on which wireless controllers can terminate the tunnel.
Answer: C F
Question 5 Answer is A,D,E
Mesh Design Recommendations
There is a < 10-ms latency per hop. Typically 2 ms to 3 ms.
■ For outdoor deployment, four or fewer hops are recommended for best performance.
A maximum of eight hops is supported.
■ For indoor deployment, one hop is supported.
■ For best performance, 20 MAP nodes per RAP is recommended. Up to 32 MAPs is
supported per RAP.
■ Throughput: one hop =14 Mbps, two hops = 7 Mbps, three hops = 3 Mbps, four hops
= 1 Mbps.
@ Jaff,
The question clearly reads, “describe the best practice”, which matching best performance numbers would be 20 MAPs per RAP. Just because something support n devices, doesn’t mean that it performs well.
Q6,
Which two of these represent a best practice implementation of a Split MAC LWAPP deployment in a Cisco Unified Wireless Network? (Choose two)
A. Each wireless client authentication type maps to a shared SSID which in turn maps to a common shared VLAN.
B. Each wireless client authentication type maps to a unique SSID which in turn maps to a unique VLAN.
C. Each wireless client authentication type maps to a unique SSID which in turn maps to a common shared VLAN.
D. 802.1 Q trunking extends from the wired infrastructure to the access point for translation into SSID(s).
E. 802.1 Q trunking extends from the wired infrastructure to a wireless LAN controller for translation into SSID(s).
F. 802.1 Q trunking extends from the wired infrastructure to a wireless LAN controller.
Then the 802.1 Q packet is encapsulated in LWAPP and sent to the access point for transmission over the SSID(s).
Answer: B E
“B” is definitely the answer.
Regarding to “E”, however, in CCDA Cert Guide 4 Ed, Chapter 5, Q36, the answer is D “to access point” (not E “to WLC”).
– D. 802.1 Q trunking extends from the wired infrastructure to the access point for translation into SSID(s).
– E. 802.1 Q trunking extends from the wired infrastructure to a wireless LAN controller for translation into SSID(s).
On page 165, figure 5-5, the diagram shows the CAPWAP that “extends to WLC” but it is showing not LWAPP.
This question is asking about LWAPP, which one is correct?
@hisulley – Believe it or not the correct answer is E in the real world. I am unsure what crack Steve Jordan or Anthony Bruno are smoking but in the real world you would rarely extend VLANS to the AP since you just tunnel the traffic back. This isn’t that Aerohive bullshit where you need to do that.
We will forever be unsure what the real answer is because no one admits fault to having the wrong answer and Cisco will not reveal the answer.
@hisulley and @crazy88
not only in the real world. Even in the prep guide (4th ed.) this seems a bit contradictory.
Fig 5.5, on page 165: the pic clearly depicts the traffic from the wired infrastructure (on the right hand side) to the WLC to the LWAP to the wireless client (or vice versa, does not matter). After all, this figure is about the difference between an autonomous AP versus CAPWAP AP with WLC.
This is why on page 164 where they are explaining Fig 5.5, they are mentioning:
“Figure 5-5 shows the difference between an autonomous AP and a CAPWAP using WLC.
Autonomous APs act as a 802.1Q translational bridge with a trunk to the LAN switch. In
CAPWAP with WLC, the AP uses a CAPWAP tunnel, and the WLC establishes the
802.1Q trunk to the LAN switch.”…but in the CAPWAP it is not an AP but an LWAP.
Since in this figure an LWAP is used and not an autonomous AP, IMHO, the correct answers are indeed B and E and that their answer is simply wrong. I do not know whether they will publish an errata correcting this mistake/contradiction, but this is what I can understand by both these facts.
Same holds for Fig 5.4, page 163
Same page (p. 163) where they are also mentioning: “With the Cisco UWN split-MAC operation, the control and data messages are split. LWAPs communicate with the WLCs using control messages over the wired network. LWAPP or CAPWAP data messages are encapsulated and forwarded to and from wireless clients. The WLC manages multiple APs, providing configuration information and firmware updates as needed.”
and since someone may mention the LWAPP,
“Layer 3 LWAPP tunnels are used between the LWAP and the WLC.”
sorry if these do not make sense, I am merely providing my understanding
What is the best practice for placement of WLC?
1.Distributed throughout in building distribution
2.centralized at the core
Question 5 is good!
“Number of MAPs per RAP—There is no current software limitation of how many MAPs per RAP you can configure. However, it is suggested that you limit this to 20 MAPs per RAP to avoid bottle necks in your mesh. “
Cisco site mentions what theos said. But just because there is no software limitations the book guide presents 20-32 as the best practice. The site clearly suggests 20 or fewer. And I don’t have a clue if cisco tests lean more to their official guide books or their site info.
Are all these questions still current?
No mention of OTAP in the reference guide, thanks again Cisco!
Can someone explain the logic behind Q5 answer E?