Question 1

A major function of the MAC layer involves defining procedures for a wireless device to discover the WLAN.

Accepted Answer

The MAC layer is responsible for medium access control, which includes procedures for a wireless device to discover and access the WLAN. These procedures may involve scanning for available access points, authenticating with a network, and associating with an access point. Therefore, the statement is true.

Question 2

A method of roaming between APs that are separated by a router is referred to as which of the following?&#10;A) Layer 2 roaming&#10;B) infrastructure roaming&#10;C) Mobile IP&#10;D) wireless distribution system

Accepted Answer

Mobile IP is designed to enable devices to move between different networks while maintaining a permanent IP address. This is essential for roaming between APs that are separated by a router, as it allows for seamless connectivity and communication across different network segments or IP subnets. Layer 2 roaming, infrastructure roaming, and wireless distribution system (WDS) are related to wireless networking but do not specifically address the challenge of maintaining a consistent IP address across router boundaries.

Question 3

The 802.11n standard adds a feature to CSMA/CA which is necessary for A-MPDU aggregation called which of the following?&#10;A) frame acknowledgement&#10;B) node collision protocol&#10;C) virtual carrier sensing&#10;D) block acknowledgement

Accepted Answer

C

Question 4

The HCF channel access method allows for prioritized traffic types.

Accepted Answer

The HCF channel access method does indeed allow for prioritized traffic types, with higher priority traffic being given preferential access to the channel over lower priority traffic.

Question 5

When an AP accepts or rejects a wireless device it sends a(n)____ frame.&#10;A) association request&#10;B) association response&#10;C) authentication&#10;D) reassociation

Accepted Answer

When a wireless device sends an association request to an AP, the AP responds with an association response frame. This frame indicates whether the device was accepted or rejected for association with the AP. Therefore, the correct answer is B) association response. The other choices, such as authentication and reassociation, are related to different aspects of the wireless connection process.

Question 6

What is the default authentication method according to the 802.11 standard?&#10;A) basic&#10;B) open system&#10;C) shared key&#10;D) private key

Accepted Answer

The default authentication method according to the 802.11 standard is open system, which does not require any authentication or encryption. However, this method is not secure and can leave the network vulnerable to unauthorized access. It is recommended to use more secure authentication methods such as WPA2-PSK or 802.1X/EAP. Option A (basic) and C (shared key) are also available authentication methods but they are less secure than WPA2-PSK or 802.1X/EAP. Option D (private key) is not a commonly used authentication method for Wi-Fi networks.

Question 7

On ESS networks that have multiple access points,the wireless device might actually receive beacon frames from several APs.Which AP would a wireless device generally choose in this case?&#10;A) the closest&#10;B) the one with the fewest wireless devices attached to the AP&#10;C) the one with the strongest signal strength&#10;D) the choice will be random

Accepted Answer

Wireless devices generally choose the access point with the strongest signal strength as it indicates that the access point is closest and has the strongest signal quality. This helps in ensuring good connectivity and faster data transfer rates.

Question 8

At regular intervals the AP sends a ____ frame to both announce its presence and to provide the necessary information for other devices to join the network.&#10;A) master&#10;B) beacon&#10;C) data&#10;D) control

Accepted Answer

The beacon frame is sent by the Access Point (AP) at regular intervals to announce its presence and provide necessary information for other devices to join the network. The master frame does not exist in Wi-Fi networks, and the data and control frames are used for other purposes (such as transmitting actual data or controlling the wireless connection).

Question 9

What is the first step in shared key authentication?&#10;A) AP encrypts challenge text and sends it to wireless device&#10;B) wireless device encrypts challenge text and sends it to AP&#10;C) AP sends wireless device an authentication frame that contains a block of text known as the challenge text&#10;D) wireless device sends an authentication frame to the AP

Accepted Answer

The answer of What is the first step in shared...

Question 10

Increasing the beacon interval will normally increase wireless network traffic as well.

Accepted Answer

The beacon interval is the time between beacon frames sent by the access point. Increasing the beacon interval means the access point will send less beacon frames, resulting in less overall network traffic. However, a longer interval may lead to decreased roaming performance and increased latency.

Question 11

Which is true about wireless authentication methods?&#10;A) open system authentication is an optional secure authentication method&#10;B) shared key authentication requires manual key installation&#10;C) open system authentication uses a 128-bit encryption key&#10;D) only the SSID must be known when using shared key authentication

Accepted Answer

The answer of Which is true about wireless authentication methods?&#10;A)...

Question 12

Which best describes a BSS?&#10;A) a group of wireless devices that is served by a single access point&#10;B) a unique identifier&#10;C) a geographical area where wireless devices reside&#10;D) one or more APs serving a single group of wireless devices

Accepted Answer

The answer of Which best describes a BSS?&#10;A) a group...

Question 13

Which is true of passive scanning?&#10;A) a station listens for a beacon frame with an SSID for a set period of time&#10;B) a station sends out a directed probe&#10;C) a station sends out a broadcast probe&#10;D) APs with a matching SSID will reply with a probe response

Accepted Answer

The answer of Which is true of passive scanning?&#10;A) a...

Question 14

A BSS is served by one or more APs.

Accepted Answer

The answer of A BSS is served by one or...

Question 15

CSMA/CD cannot be used with wireless networks because it is difficult to detect collisions on a wireless LAN.

Accepted Answer

The answer of CSMA/CD cannot be used with wireless networks...

Question 16

Which of the following is true about wireless network operation modes?&#10;A) a WLAN that uses an AP operates in peer-to-peer mode&#10;B) a WLAN that does not use an AP operates in infrastructure mode&#10;C) a WLAN operating in ad hoc mode does not use an AP&#10;D) a WLAN classified as an IBSS uses an AP

Accepted Answer

The answer of Which of the following is true about...

Question 17

Which of the following describes the process of a wireless device switching from one AP to another?&#10;A) roaming&#10;B) handoff&#10;C) routing&#10;D) redirecting

Accepted Answer

The answer of Which of the following describes the process...

Question 18

Following authentication,if the access point accepts the wireless device,it reserves memory space in the AP and establishes a(n)____ ID for it.&#10;A) association&#10;B) device&#10;C) member&#10;D) authentication

Accepted Answer

The answer of Following authentication,if the access point accepts the...

Question 19

Which is true about the CSMA/CD media access method?&#10;A) collisions can't be detected so they are avoided&#10;B) the hidden node problem makes it unsuitable for wireless networks&#10;C) all stations wait a random amount of time after the medium is clear&#10;D) it uses frame acknowledgement

Accepted Answer

The answer of Which is true about the CSMA/CD media...

Question 20

Which of the following is true about RTS/CTS?&#10;A) a station must transmit before the NAV value is zero&#10;B) the RTS is sent by the AP to indicate the medium is being reserved&#10;C) the RTS indicates the length of time needed for the transmission and ACK&#10;D) the RTS/CTS method is most efficient when short data frames are being transmitted

Accepted Answer

The answer of Which of the following is true about...

Question 21

Describe passive scanning.

Accepted Answer

The answer of Describe passive scanning....

Question 22

In shared key authentication,a wireless device sends an authentication frame to the AP.The AP sends back an authentication frame that contains a block of text known as the ____________________.

Accepted Answer

The answer of In shared key authentication,a wireless device sends...

Question 23

____ effectively prevents collisions because every device must wait until it receives permission before it can transmit.&#10;A) CSMA/CD&#10;B) CSMA/CA&#10;C) Polling&#10;D) Fragmentation

Accepted Answer

The answer of ____ effectively prevents collisions because every device...

Question 24

Define Basic Service Set?

Accepted Answer

The answer of Define Basic Service Set?...

Question 25

Describe shared key authentication.

Accepted Answer

The answer of Describe shared key authentication....

Question 26

CSMA/CA reduces collisions is by using explicit frame acknowledgment.Describe how frame acknowledgment works.

Accepted Answer

The answer of CSMA/CA reduces collisions is by using explicit...

Question 27

Which of the following are components of Mobile IP? (Choose all that apply.)&#10;A)home agent&#10;B)IBSS&#10;C)foreign agent&#10;D)care-of-address

Accepted Answer

The answer of Which of the following are components of...

Question 28

What is a management frame?

Accepted Answer

The answer of What is a management frame?...

Question 29

Describe active scanning.

Accepted Answer

The answer of Describe active scanning....

Question 30

Define Extended Service Set.

Accepted Answer

The answer of Define Extended Service Set....

Question 31

A(n)____________________ Service Set is a wireless network that does not use an access point.

Accepted Answer

The answer of A(n)____________________ Service Set is a wireless network...

Question 32

Which of the following are access category classes into which EDCA divides transmissions? (Choose all that apply.)&#10;A)background&#10;B)video&#10;C)binary&#10;D)best effort

Accepted Answer

The answer of Which of the following are access category...

Question 33

Describe Mobile IP.

Accepted Answer

The answer of Describe Mobile IP....

Question 34

Which of the following are true about OSI model data units? (Choose all that apply.)&#10;A)an SDU has been passed down from a higher layer to a lower layer&#10;B)encapsulation occurs when a higher layer adds headers to the PDU&#10;C)an SDU at a given layer is the PDU of the layer below&#10;D)a PDU will be sent to the peer layer at the receiving device

Accepted Answer

The answer of Which of the following are true about...

Question 35

____________________ are standard intervals between the transmissions of data frames and are used for special types of transmissions.

Accepted Answer

The answer of ____________________ are standard intervals between the transmissions...

Question 36

____________________ is a means of reducing collisions and involves dividing the data to be transmitted from one large frame into several smaller ones.

Accepted Answer

The answer of ____________________ is a means of reducing collisions...

Question 37

An access method in which each device is asked,in sequence,if it wants to transmit,is called ___________.

Accepted Answer

The answer of An access method in which each device...

Question 38

Which of the following are wireless LAN service set configurations? (Choose all that apply.)&#10;A)advanced service set&#10;B)basic service set&#10;C)extended service set&#10;D)independent basic service set

Accepted Answer

The answer of Which of the following are wireless LAN...

Question 39

In which access method does the access point serve as the polling device?&#10;A) PCF&#10;B) DCF&#10;C) CSMA/CA&#10;D) contention

Accepted Answer

The answer of In which access method does the access...

Question 40

Describe three of the interframe spaces (IFS)defined in the 802.11 standard.

Accepted Answer

The answer of Describe three of the interframe spaces (IFS)defined...

Question 41

List the four different access category classes defined by EDCA.

Accepted Answer

The answer of List the four different access category classes...

Question 42

Match between columns&#10;                        Premises: device that provides routing services to the mobile computer in Mobile IP&#10;device that provides routing services to the mobile computer in Mobile IP&#10;device that provides routing services to the mobile computer in Mobile IP&#10;device that provides routing services to the mobile computer in Mobile IP&#10;device that provides routing services to the mobile computer in Mobile IP&#10;device that provides routing services to the mobile computer in Mobile IP&#10;device that provides routing services to the mobile computer in Mobile IP&#10;device that provides routing services to the mobile computer in Mobile IP&#10;device that provides routing services to the mobile computer in Mobile IP&#10;the final step in the process of a station being accepted into the wireless network&#10;the final step in the process of a station being accepted into the wireless network&#10;the final step in the process of a station being accepted into the wireless network&#10;the final step in the process of a station being accepted into the wireless network&#10;the final step in the process of a station being accepted into the wireless network&#10;the final step in the process of a station being accepted into the wireless network&#10;the final step in the process of a station being accepted into the wireless network&#10;the final step in the process of a station being accepted into the wireless network&#10;the final step in the process of a station being accepted into the wireless network&#10;a process in which a station first sends out a management probe request frame on an available channel&#10;a process in which a station first sends out a management probe request frame on an available channel&#10;a process in which a station first sends out a management probe request frame on an available channel&#10;a process in which a station first sends out a management probe request frame on an available channel&#10;a process in which a station first sends out a management probe request frame on an available channel&#10;a process in which a station first sends out a management probe request frame on an available channel&#10;a process in which a station first sends out a management probe request frame on an available channel&#10;a process in which a station first sends out a management probe request frame on an available channel&#10;a process in which a station first sends out a management probe request frame on an available channel&#10;the amount of time that a station must wait after the medium is clear&#10;the amount of time that a station must wait after the medium is clear&#10;the amount of time that a station must wait after the medium is clear&#10;the amount of time that a station must wait after the medium is clear&#10;the amount of time that a station must wait after the medium is clear&#10;the amount of time that a station must wait after the medium is clear&#10;the amount of time that a station must wait after the medium is clear&#10;the amount of time that a station must wait after the medium is clear&#10;the amount of time that a station must wait after the medium is clear&#10;a wireless network that does not use an AP&#10;a wireless network that does not use an AP&#10;a wireless network that does not use an AP&#10;a wireless network that does not use an AP&#10;a wireless network that does not use an AP&#10;a wireless network that does not use an AP&#10;a wireless network that does not use an AP&#10;a wireless network that does not use an AP&#10;a wireless network that does not use an AP&#10;a probe request frame sent by a station that contains a specific SSID that the device is searching for&#10;a probe request frame sent by a station that contains a specific SSID that the device is searching for&#10;a probe request frame sent by a station that contains a specific SSID that the device is searching for&#10;a probe request frame sent by a station that contains a specific SSID that the device is searching for&#10;a probe request frame sent by a station that contains a specific SSID that the device is searching for&#10;a probe request frame sent by a station that contains a specific SSID that the device is searching for&#10;a probe request frame sent by a station that contains a specific SSID that the device is searching for&#10;a probe request frame sent by a station that contains a specific SSID that the device is searching for&#10;a probe request frame sent by a station that contains a specific SSID that the device is searching for&#10;the process in which a network device first listens on the wire to see if any other device is currently transmitting&#10;the process in which a network device first listens on the wire to see if any other device is currently transmitting&#10;the process in which a network device first listens on the wire to see if any other device is currently transmitting&#10;the process in which a network device first listens on the wire to see if any other device is currently transmitting&#10;the process in which a network device first listens on the wire to see if any other device is currently transmitting&#10;the process in which a network device first listens on the wire to see if any other device is currently transmitting&#10;the process in which a network device first listens on the wire to see if any other device is currently transmitting&#10;the process in which a network device first listens on the wire to see if any other device is currently transmitting&#10;the process in which a network device first listens on the wire to see if any other device is currently transmitting&#10;a probe request frame sent by a station with a null value as the SSID so that all APs will respond&#10;a probe request frame sent by a station with a null value as the SSID so that all APs will respond&#10;a probe request frame sent by a station with a null value as the SSID so that all APs will respond&#10;a probe request frame sent by a station with a null value as the SSID so that all APs will respond&#10;a probe request frame sent by a station with a null value as the SSID so that all APs will respond&#10;a probe request frame sent by a station with a null value as the SSID so that all APs will respond&#10;a probe request frame sent by a station with a null value as the SSID so that all APs will respond&#10;a probe request frame sent by a station with a null value as the SSID so that all APs will respond&#10;a probe request frame sent by a station with a null value as the SSID so that all APs will respond&#10;an optional access method using RTS/CTS&#10;an optional access method using RTS/CTS&#10;an optional access method using RTS/CTS&#10;an optional access method using RTS/CTS&#10;an optional access method using RTS/CTS&#10;an optional access method using RTS/CTS&#10;an optional access method using RTS/CTS&#10;an optional access method using RTS/CTS&#10;an optional access method using RTS/CTS

Accepted Answer

The Answer of carrier sensing and slot time and directed is...

Deck 6: Medium Access Control Layer Standards