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1
Q

What are some ways to reduce the AP coverage area?

A

Reduce AP transmit power
Increase minimum mandatory data rate

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2
Q

Which antenna type should be used for a site-to-site wireless connection?

A

Yagi

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3
Q

What is calculated using the numerical values of the transmitter power level, cable loss, and antenna gain?

A

EIRP

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4
Q

What does the LAP send when multiple WLCs resolve the domain name during the CAPWAP discovery and join process,

A

Unicast discovery request to each WLC

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5
Q

What are the PAGP modes?

A

Desirable
Auto
On

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6
Q

Which DNS lookup does an AP perform when attempting CAPWAP discover?

A

CISCO-CAPWAP-CONTROLLER.local

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7
Q

What feature allows legacy clients in a WLAN to connect while still allowing other clients to use fast transition based on their OUIs?

A

Adaptive 802.11r

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8
Q

What are some common sources of interface for Wi-Fi networks?

A

Radar
Rogue AP

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9
Q

What two components are needed to compute SNR?

A

Noise floor
RSSI

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10
Q

What OSPF network types are compatible and allows communication through the two peering devices?

A

broadcast to non-broadcast
broadcast to broadcast
non-broadcast to non-broadcast
p2p to p2p

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11
Q

Which debugging statement allows you to see hello messages a router has sent/received on interface g1/0?

A

debug ip ospf hello

#debug condition int g1/0

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12
Q

When are multicast RPs needed?

A

To start new sessions with sources and receivers

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13
Q

What EtherChannel mode should be configured on a switch to allow the WLC to connect and increase total throughput and redundancy on the links?

A

On

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14
Q

What must match to establish OSPF neighborship?

A

Hello/dead times
Area ID
Auth type/data
Subnet
MTU size
Stub flag

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15
Q

What should you configure to elect a root port on an upstream switch?

A

Configure port priority

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16
Q

What should you configure to elect a root port on downstream switches?

A

Modify port cost

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17
Q

What is the default port priority?

A

128

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18
Q

What is the order of preference for selecting a path in BGP?

A

Weight
Local preference
AS path
Metric

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19
Q

What is the default local preference value in BGP?

A

100

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20
Q

What mechanisms can secure NTP?

A

Encrypted authentication mechanism
Access list-based restriction scheme

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21
Q

In OSPF, which LSA type points to the ASBR router?

A

Type 4

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22
Q

In OSPF, which LSA type points to the ABR router?

A

Type 3

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23
Q

Where should VTP pruning be enabled?

A

On VTP servers

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24
Q

What could cause an OSPF neighborship to be in the EXSTART/EXCHANGE state?

A

Mismatched MTU size

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25
What should an engineer deploy if a customer has several small branches and wants to deploy a Wi-Fi solution with local management using CAPWAP?
Mobility Express
26
In what type of roaming is the anchoring feature use?
Layer 3
27
Does EIGRP or OSPF support unequal path load balancing?
EIGRP
28
What type of RP is OSPF?
Link state
29
What type of RP is EIGRP
Distance vector
30
What is the EIGRP metric based on?
Delay and bandwidth
31
What routing protocol makes it easy to segment the network logically?
OSPF
32
In EBGP, what does the Active state mean?
The local router is attempting to open a TCP session with the neighboring router
33
What is the default behavior of trunks?
To allow all VLANS
34
What is weight in BGP?
Value assigned to prefix Higher weight is preference Default = 0 Locally significant
35
What is local preference in BGP?
Used to choose outbound paths Applies to whole AS group Default = 100 Higher number is preference
36
What NTP stratum level describes NTP servers that are directly attached to an authoritative time source?
Stratum 1
37
How do you disable bpdu guard?
#no spanning-tree bpduguard enable #shut #no shut
38
What happens if controllers in a mobility group are not using the same virtual interface?
Roaming appears to work but hand-off does not complete and client uses connectivity for a period of time
39
What is the role of the RP in PIM sparse mode?
The RP is the multicast router that is the root of the PIM-SM shared multicast distribution tree
40
What is the process of storing controller IP addresses on an AP for later deployment called?
Priming
41
Why would an AP join a different WLC from the one specified in option 43?
The AP has previously joined a controlled and has been primed with a primary, secondary, and tertiary controller
42
What kind of roaming occurs if APs are connected to different WLCs?
Inter-controller
43
What kind of roaming occurs if the APs are on the same WLC?
Intra-controller
44
What helps LAPs with CAPWAP discovery?
DHCP option 43 Configure ip-helper address
45
In what kind of connection in OSPF is there no DR and BDR?
Point-to-point
46
What is dynamic channel assignment?
Allows client to switch from one channel to another, causes a disruption Default time = 10 minutes
47
What algorithm does EIGRP use?
DUAL algorithm
48
In what IGP can summaries be created anywhere in the IGP topology?
EIGRP
49
What does an RP do in PIM?
Send join messages toward a multicast source SPT
50
How does OSPF behave after a link failure?
Quickly computes new path
51
How does EIGRP behave after a link failure?
Maintains alternative loop-free backup path if available
52
What commands can be used to ensure a switch will become the root bridge?
#spanning-tree 1 root primary #spanning-tree 1 priority {increment of 4096} default is 32768
53
What does setting the DF bit do?
Decide if packets can be sent fragmented or not
54
What mechanism does PIM use to forward multicast traffic using a pull model?
PIM sparse mode
55
What mechanism does PIM use to forward multicast traffic using a push model?
PIM dense mode
56
What does OSPF use to calculate metric?
Bandwidth only
57
What is a possible cause of an EtherChannel misconfiguration that shoes no ports in the summary output?
Correct port members not defined
58
What encryption hashing algorithm does NTP use for authentication?
MD5
59
How is priority configured on STP?
In increments of 16 Default priority is 128
60
What L2 security policies should be used to leverage Wi-Fi 6 speeds on the WLAN?
802.1x OPEN
61
What are ways an AP can discover a WLC?
DHCP option 43 Broadcasting on the local subnet
62
What is the responsibility of a secondary WLC?
Registers LAPs if the primary controller fails
63
What is FlexConnect?
A wireless solution for branch office and remote office deployments Can tunnel traffic back to the controller when connected to the controller
64
How must spanning-tree be configured if you want multiple VLANs?
#spanning-tree portfast trunk in interface config mode
65
What does BPDU filtering do?
Allows you to avoid transmitting BPDUs on PortFast-enabled ports that are connected to an end system
66
What antenna types are omnidirectional?
Ceiling mount Dipole
67
What antenna types are directional?
Yagi Patch directional Parabolic dish
68
How would a LAP discover a WLC within a LAN?
DHCP option 43
69
How would a LAP discover a WLC outside of a LAN?
Use an IP helper address #int vlan [int] #ip helper-address [add]
70
What is the AP decision process priority?
1. WLC it has joined before 2. Primary controller 3. WLC with lowest number of APs

ENCOR (3 decks)

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