Mod 3: MAC specifications - PE Flashcards
[True / False]
Wireless capability gives us the ability to convert 1s and 0s into radio waves, and convert radio waves back into 1s and 0s.
True
CSMA/CA is a protocol that operates in which layer of the OSI model?
- Layer 1- Physical Layer
- Layer 2- Data Link Layer
- Layer 3- Network Layer
- None of the above
Layer 2- Data Link Layer
Which technologies, which allow multiple users to send data across a shared medium, do not use Collision Detection or Collision Avoidance?
- CDMA
- TDMA
- CSMA/CD
- CSMA/CA
- Answer A & B
Answer A & B
[TRUE / FALSE]
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.
TRUE
What does RTS/CTS stand for?
- REQUESTED TIME SLOT/CLEARED TIME SLOT
- REQUEST TO SECURE/CLEAR TO SECURE
- REQUEST TO SEND/CLEAR TO SEND
- None of the Above
REQUEST TO SEND/CLEAR TO SEND
When a device first turns on, it must attempt to connect to a what?
- Aerial Point
- Operating Network
- Access Point
- None of the Above
Access Point
[TRUE / FALSE]
Open System and Shared Key are two link-level types of authentication defined by IEEE 802.11 standards.
TRUE
Open System Authentication consists of two communications:
- Authentication Request/Authentication Response
- Authentication Sent/Authentication Cleared
- Authentication Sent/Authentication Received
- Authentication Request/Authentication Received
Authentication Request /Authentication Response
During the Shared Key Authentication Phase, the Access Point sends the challenge phrase back in encrypted text.
[True / False]
False
During the Shared Key Authentication Phase, the Station sends back to the AP the challenge phrase in clear text.
[True / False]
False
WPA/WPA2 complies with the wireless security standard and strongly increases the level of data protection and access control (authentication) for a wireless network.
[True / False]
True
Association only occurs on wireless infrastructure networks, not in peer-peer mode.
[True / False]
True
A station can associate with multiple AP/routers at one time.
[True / False]
False
What are the three 802.11 Frame Types?
- Management, Control, Data
- MAC, Control, Data
- Control, Data, Wifi
- Beacon, Control, Data
Management, Control, Data
Which frame is used in dealing with clients that are JOINING or LEAVING wireless networks?
- Control
- Data
- Management
- None of the Above
Management
What constantly broadcasts signal from a wireless access point announcing itself to clients?
- Probe Request
- Probe Response
- Beacon
- None of the Above
Beacon
Which is used to obtain information from an AP?
- Probe Response
- Probe Request
- Association Request
- Association Response
Probe Request
What is used by an AP to send info about its parameters?
- Probe Response
- Probe Request
- Association Request
- Association Response
Probe Response
What is sent, once it is authenticated to an SSID?
- Probe Response
- Probe Request
- Association Request
- Association Response
Association Request
What is sent back by an AP, in order to accept or deny association?
- Probe Response
- Probe Request
- Association Request
- Association Response
Association Response
Data Frames carry the payload and actual data being sent from the upper layers of the OSI model.
[True / False]
True
Which layer of the OSI model are MAC addresses found?
- Layer 1
- Layer 2
- Layer 3
- Layer 4
Layer 2
MAC addresses are not the PHYSICAL address of the device.
[True / False]
False
Wireless communication frames will include MAC addresses for each device.
[True / False]
True
The destination device will ALWAYS be the receiver device.
[True / False]
False
