802 Layer 2 PE

Question 1

Wireless capability gives us the ability to convert 1s and 0s into radio waves, and convert radio waves back into 1s and 0s.

Answer 1

True

Question 2

CSMA/CA is a protocol that operates in which layer of the OSI model?

Answer 2

Layer 2- Data Link Layer

Question 3

Which technologies, will allow multiple users to send data across a shared medium, do not use Collision Detection or Collision Avoidance?

A. CDMA

B. TDMA

C. CSMA/CD

D. CSMA/CA

E. Answer A & B

Answer 3

ANSWER A & B

Question 4

Wireless networks often use a Collision Avoidance (CA) protocol. Where a device will wait a random amount of time, before attempting to send data again, if it recognizes the medium as being busy.

Answer 4

True

Question 5

What does RTS/CTS stand for?

Answer 5

REQUEST TO SEND/CLEAR TO SEND

Question 6

When a device first turns on, it must attempt to connect to a what?

Answer 6

Access Point

Question 7

Open System and Shared Key are two link-level types of authentication defined by IEEE 802.11 standards.

Answer 7

True

Question 8

Open System Authentication consists of two communications:

Answer 8

Authentication Request/Authentication Response

Question 9

During the Shared Key Authentication Phase, the Access Point sends the challenge phrase back in encrypted text.

Answer 9

False. It sends it back in CLEAR text.

Question 10

During the Shared Key Authentication Phase, the Station sends back to the AP the challenge phrase in clear text.

Answer 10

False. The Station sends it ENCRPYTED

Question 11

WPA/WPA2 complies with the wireless security standard and strongly increases the level of data protection and access control (authentication) for a wireless network.

Answer 11

True

Question 12

Association only occurs on wireless infrastructure networks, not in peer-peer mode.

Answer 12

True

Question 13

A station can associate with multiple AP/routers at one time.

Answer 13

False.

Question 14

What are the three 802.11 Frame Types?

Answer 14

Management, Control, Data

Question 15

Which frame is used in dealing with clients that are JOINING or LEAVING wireless networks?

Answer 15

Management

Question 16

What constantly broadcasts signal from a wireless access point announcing itself to clients?

Answer 16

Beacon

Question 17

Which is used to obtain information from an AP?

Answer 17

Probe Request

Question 18

What is used by an AP to send info about its parameters?

Answer 18

Probe Response

Question 19

What is sent, once it is authenticated to an SSID?

Answer 19

Association Request

Question 20

What is sent back by an AP, in order to accept or deny association?

Answer 20

Association Response

Question 21

Data Frames carry the payload and actual data being sent from the upper layers of the OSI model.

Answer 21

True

Question 22

Which layer of the OSI model are MAC addresses found?

Answer 22

Layer 2

Question 23

MAC addresses are not the PHYSICAL address of the device.

Answer 23

False

Question 24

Wireless communication frames will include MAC addresses for each device.

Answer 24

True

Question 25

The destination device will ALWAYS be the receiver device.

Answer 25

False