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CCNP Encor 350-401 > Chapter 18: Wireless Infrastructure > Flashcards

Chapter 18: Wireless Infrastructure Flashcards

1
Q

An AP that offers one or more fully functional, standalone basic service sets.

A

Autonomous AP

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2
Q

What must an autonomous AP be configured with to enable remote management?

A

Management IP

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3
Q

T/F

A dedicated management VLAN must be added to every trunk link to reach an autonomous AP.

A

True

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4
Q

T/F

Autonomous APs become easier to manage and configure as the wireless network expands.

A

False

As the wireless network expands, the infrastructure becomes more difficult to configure correctly and becomes less efficient.

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5
Q

T/F

Wireless traffic can travel between autonomous APs without having to travel across the wired network.

A

True

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6
Q

An AP that must join a WLC to become fully functional.

A

Lightweight

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7
Q

Define split-MAC architecture

A

The AP handles most of the real-time 802.11 processes and the WLC performs the management functions.

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8
Q

What is used to logically connect an AP and a WLC?

A

CAPWAP tunnel

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9
Q

A topology where the WLC is placed in a central location to maximize the number of APs that can be connected to it.

A

Centralized/Unified WLAN

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10
Q

What kind of link is used to connect a lightweight AP to an access layer switch?

A

Access link

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11
Q

T/F

Wireless traffic can travel between lightweight APs without having to travel across the wired network.

A

False.

Traffic is carried across the CAPWAP tunnel to the WLC.

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12
Q

Round-Trip Time (RTT) between AP and WLC

A

Less than 100ms

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13
Q

What can occur if the RTT between AP and WLC is too high?

A

The APs might decide the WLC is not responding fast enough. This can cause the AP to disconnect and find a faster WLC to connect to.

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14
Q

A wireless topology where the WLC is embedded in the switch hardware.

A

Embedded WLAN.

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15
Q

Benefit of embedded topology

A

Cost-effective

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16
Q

Mobility Express topology

A

A Cisco AP also runs software that acts as a WLC.

17
Q

How many APs can a Mobility Express WLC support?

A

100

18
Q

List the AP State Machine Steps

A
  1. AP boots
  2. WLC discovery
  3. CAPWAP
  4. WLC Join
  5. Download image
  6. Download config
  7. Run state
  8. Reset
19
Q

T/F

Lightweight AP software can be manually controlled from the WLC.

A

False

The WLC that the AP connects to determines the software the lightweight AP runs.

20
Q

What methods does a AP use to build a list of available WLCs to join?

A
  1. Prior knowledge of WLCs
  2. DHCP and DNS info to suggest some controllers.
  3. Broadcast on local subnet to solicit controllers.
21
Q

An AP send a CAPWAP Discovery Request as :

A. Unicast
B. Multicast
C. Broadcast to local subnet

A

A. Unicast

OR

C. Broadcast to local subnet

22
Q

What port is used for a CAPWAP Discovery Request?

A. TCP 5246
B. UDP 5246
C. TCP 5247
D. UDP 5247

A

B. UDP 5246

23
Q

What ports does CAPWAP use?

A

5246 (Control)

5247 (Data)

24
Q

CAPWAP is described in which RFC?

A. 5545
B. 3261
C. 5321
D. 5415

A

D. 5415

25
Q

What do WLCs respond to a CAPWAP Discovery Request with?

A

CAPWAP Discovery Response

26
Q

What does an AP send to a WLC when it tries to join the WLC?

A

CAPWAP Join Request

27
Q

What determines the number of APs that a WLC can support?

A

Platform or License

28
Q

List the 4 AP priority values.

A

Low
Medium
High
Critical

29
Q

Default keepalive interval

A

30 seconds

30
Q

What happens if an AP does not detect a response to a keepalive?

A

The AP sends 4 more keepalives at 3-second intervals.

31
Q

List the AP modes

A 
Local
Monitor
FlexConnect
Sniffer
Rogue detector
Bridge
Flex+Bridge
SE-Connect
32
Q

A measure of how effectively an antenna can focus RF energy in a certain direction.

A

Gain

33
Q

The electrical field wave’s orientation.

A

Polarization

34
Q

What occurs if the transmitter polarization does not match the receiver polarization?

A

Signal loss

35
Q

2 types of antennas

A

Omnidirectional

Directional

36
Q

Why do directional antennas have a higher gain than omnidirectional antennas?

A

They focus RF energy in one general direction.

37
Q

What type of antenna gives the highest gain of all WLAN antennas?

A

Parabolic dish antenna

CCNP Encor 350-401 (10 decks)

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