Prep and try our PW0-205 valid and latest training questions & answers

Which three of the following are true regarding the duration/ID field in unfragmented Data frames?

• A. When a Data frame is sent to a multicast address, the duration/ID field is always set to
  32,768.
• B. The duration/ID field is always set to zero unless Data is sent to the broadcast address of FF:FF:FF:FF:FF:FF.
• C. The duration/ID field is measured in microseconds and always rounded up to the next highest integer.
• D. If the More Fragments bit in the Frame Control field of the MAC header is set to 0, then the duration/ID field is also set to 0
• E. The duration/ID field is set to include the SIFS and ACK frame that follow the data frame.
• F. Valid frames with a duration/ID field value of ?32,767 are used by receiving stations to update their NAV.

An administrator decides to optimize wireless LAN performance by adjusting the fragmentation threshold on each access point to a value much lower than the default of
2346 bytes. She notices that when wireless client stations are doing prolonged data transfers from a wired server, that downstream performance is better than it was before her adjustments. One problem she has not yet solved is why performance in the upstream direction has not been improved due to these adjustments. As a wireless protocol analyst, which of the following explanations would you give to the administrator?

• A. When configuring fragmentation threshold values, it's important to enable RTS/CTS also in order to get effective bi-directional results.
• B. Fragmentation thresholds settings are only effective in the downstream direction (toward the wireless client stations) as specified by the IEEE 802.11 standard.
• C. Fragmentation is only supported bi-directionally when Antenna Diversity is enabled on both wireless client stations and the access point.
• D. World Mode (also known as Multi-Domain Operation) must be enabled for fragmentation to be bi-directional due to regulatory requirements in most countries.
• E. The administrator must enable client fragmentation support by configuring the access point to broadcast a special message to the clients in each beacon. This message will automatically notify the wireless client stations to use the same fragmentation threshold value used by the access point.
• F. Fragmentation thresholds are uniquely set on each wireless client station and access point and affect only transmissions from that node in particular.

When the ToDS bit is set to 1 and the FromDS bit is set to 0 in the Frame Control field of an 802.11 Data frame, what might this indicate about the infrastructure and the wireless conversation?

• A. A wireless client station could be sending data to a wireless client station across an access point.
• B. A wireless client station must be sending data directly to the access point for the purpose of managing the access point.
• C. A wireless client station could be sending data directly to another wireless client station as part of an IBSS.
• D. A wireless client station must be sending data to a wireless station where the frame has to traverse a Wireless Distribution System (WDS).
• E. A wireless client station could be sending data to a wired station through an access point.

James is a sales associate for ABC Company. Sitting at his desk, James can use the wireless LAN with no problems. James takes his laptop downstairs to ABC Company Engineering department. James finds that he cannot connect to the Internet or the company intranet, but his wireless LAN card utilities shows that he is associated to the wireless network. Engineers are reporting no network connectivity problems over the wireless LAN. When using a protocol analyzer, what will you most likely find as the cause of the problem?

• A. James has a static IP configured on his laptop, and he has now roamed across a layer 3 network boundary.
• B. Someone has placed a rogue DHCP server on the Engineering network.
• C. ABC Company administrator has configured protocol filters on the Engineering department access points.
• D. An ARP storm is consuming the wireless medium bandwidth making network connectivity almost impossible.
• E. ABC Company administrator has configured different security mechanisms for the Sales and Engineering departments.

Before accurate statistical troubleshooting with a wireless protocol analyzer can be performed on a wireless LAN, which of the following must be completed?

• A. Directional traffic filtering
• B. Baseline traffic analysis
• C. Traffic injection analysis
• D. Operational traffic policy
• E. Quality of Service (QoS) design