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WLAN
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WLAN

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Questions and Answers

WLANs offer flexibility and Reduced costs.

True

What capability does WLANs offer for users utilizing personal digital assistants (PDAs)?

  • WLANs enable secure communication between PDAs in many temporary locations.
  • WLANs restrict access to e-mail and voice mail on PDAs to the same location.
  • WLANs allow users to access e-mail, voice mail, and product statuses on PDAs in many temporary locations. (correct)
  • WLANs only provide access to e-mail and voice mail on PDAs at the same location.

    • What is a potential benefit of WLANs (Wireless Local Area Networks) in the context of reduced costs?

  • Implementing robust encryption protocols to ensure data security, thereby reducing potential risks associated with unauthorized access.
  • Utilizing advanced signal processing techniques to optimize network performance and minimize latency, resulting in enhanced user experience and productivity.
  • Flexibility in infrastructure deployment, particularly useful when a company moves into a new building that does not have any wired infrastructure. (correct)
  • Implementing redundant network architectures and failover mechanisms to ensure continuous connectivity and minimize downtime.

    • Which scenario demonstrates a cost-saving advantage of a wireless infrastructure already in place?

    <p>Savings are realized when moving a person within a building, reorganizing a lab, or moving to temporary locations or project sites</p> Signup and view all the answers

    What is the primary networking technology currently used by business network for day-to-day operations inside the office?

    <p>Switch-based LANs</p> Signup and view all the answers

    What trend is a trend regarding workers and access to LAN resources?

    <p>Growing demand for access to LAN resources from locations other than their desks</p> Signup and view all the answers

    Which statement best describes the relationship between WLAN (Wireless Local Area Network) and Ethernet LAN (Local Area Network)?

    <p>WLANs serve as an extension of the Ethernet LAN</p> Signup and view all the answers

    Which technology is used by WLANs (Wireless Local Area Networks) at the physical layer and MAC sub-layer of the data link layer, instead of traditional wired cables?

    <p>Radio frequencies (RF)</p> Signup and view all the answers

    How do WLANs (Wireless Local Area Networks) typically connect clients to the network, as opposed to traditional Ethernet networks?

    <p>Through a wireless access point (AP)</p> Signup and view all the answers

    What type of devices are commonly connected to WLANs (Wireless Local Area Networks), often being powered by batteries?

    <p>Mobile devices</p> Signup and view all the answers

    How do WLANs (Wireless Local Area Networks) manage access to the radio frequency (RF) media or frequency bands?

    <p>By allowing hosts to contend for access on the RF media</p> Signup and view all the answers

    WLANs use a different frame format than wired Ethernet LANs.

    <p>True</p> Signup and view all the answers

    Compared to wired Ethernet LANs, what characteristic of WLANs (Wireless Local Area Networks) leads to increased concern about security?

    <p>More security issues</p> Signup and view all the answers

    how does 802.11 Wireless LAN differ to 802.3 Ethernet LANs at the physical layer?

    <p>lans use cable and wlans use radio frequency(RF)</p> Signup and view all the answers

    how does 802.11 Wireless LAN differ to 802.3 Ethernet LANs at the media access ?

    <p>wlan use collision avoidance and lan use collision detection</p> Signup and view all the answers

    how does 802.11 wireless LAN differ to 802.3 Ethernet LANs at the availability (choose 2)? A) in lans, Cable connection reguired B) in wlans, Anyone with a radio NIC in range of an access point C) in wlans, Cable connection reguired D) in lans, Anyone with a radio NIC in range of an access point

    <p>A B</p> Signup and view all the answers

    does wlans suffer from from signal interference ? T=yes F=no

    <p>True</p> Signup and view all the answers

    does lans suffer from from signal interference ?

    <p>inconsequential</p> Signup and view all the answers

    how does 802.11 Wireless LAN differ to B02.3 Ethernet LANs at the Regulation (choose 2)?

    A) in lans, Additional regulation by local authorities B) in wlans, IEEE standard dictates C) in wlans, Additional regulation by local authorities D) in lans, IEEE standard dictates

    <p>C D</p> Signup and view all the answers

    How do 802.11 wireless LANs extend the 802.3 Ethernet LAN infrastructures?

    <p>By offering alternative connectivity option</p> Signup and view all the answers

    How do clients use a wiresless adapter gain access to a Wireless LAN (WLAN) ?

    <p>Through a wireless device such as a router or access point</p> Signup and view all the answers

    How does the wireless adapter in a client communicate with the wireless router or access point in a Wireless LAN (WLAN)?

    <p>Through radio frequency (RF) signals</p> Signup and view all the answers

    How does the access to network resources by wireless clients compare to clients wired to the network in a Wireless LAN (WLAN)?

    <p>Wireless clients have the same access to network resources as wired clients</p> Signup and view all the answers

    What is the typical data rate range for 802.11 wireless networks?

    <p>1 - 2 Mb/s</p> Signup and view all the answers

    What is the maximum data rate supported by 802.11a and 802.11g wireless networks?

    <p>Up to 54 Mb/s</p> Signup and view all the answers

    What is the maximum data rate supported by 802.11b wireless networks?

    <p>Up to 11 Mb/s</p> Signup and view all the answers

    What is the speculated maximum data rate for 802.11n wireless networks?

    <p>Up to 300 Mb/s</p> Signup and view all the answers

    What is the data rate range for 802.11ac (WiFi 5) wireless networks?

    <p>433 Mb/s - 1.3 Gb/s</p> Signup and view all the answers

    What is the data rate range for 802.11ax (Wi-Fi 6) wireless networks?

    <p>600 Mbps - 9.607 Gbps</p> Signup and view all the answers

    Which modulation technique is used by 802.11b and 802.11g wireless networks?

    <p>Direct Sequence Spread Spectrum (DSSS)</p> Signup and view all the answers

    Which modulation technique is used by 802.11a, 802.11g, and 802.11n wireless networks?

    <p>Orthogonal Frequency Division Multiplexing (OFDM)</p> Signup and view all the answers

    Which frequency band is used by 802.11b, 802.11g, and 802.11n wireless networks, known for its better range and lower possibility to obstruction?

    <p>2.4 GHz</p> Signup and view all the answers

    Which frequency band is used by 802.11a and 802.11n wireless networks?

    <p>5 GHz</p> Signup and view all the answers

    Which device enables a client station to send and receive RF signals in a wireless network?

    <p>Wireless NIC (Network Interface Card)</p> Signup and view all the answers

    Which device enables a client station to send and receive RF signals in a wireless network, particularly for desktops located in an existing, non-wired facility?Which device enables a client station to send and receive RF signals in a wireless network, particularly for desktops located in an existing, non-wired facility?

    <p>E F</p> Signup and view all the answers

    What is the primary function of an access point in a wireless network?

    <p>Connecting wireless clients to the wired LAN</p> Signup and view all the answers

    Which statement accurately describes the function of an access point in a wireless network?

    <p>An access point functions as a Layer 2 device, similar to an 802.3 Ethernet hub.</p> Signup and view all the answers

    What distributed coordination function (DCF) is overseen by access points in wireless networks?

    <p>Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)</p> Signup and view all the answers

    What action does an access point typically take upon receiving data from a client station in a wireless network?

    <p>It sends an acknowledgement to the client station confirming that the data has been received.</p> Signup and view all the answers

    What is the primary purpose of the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol used by access points in wireless networks?

    <p>To avoid collisions and media contention</p> Signup and view all the answers

    What is the primary purpose of the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol used by access points in wireless networks?

    <p>To avoid collisions and media contention</p> Signup and view all the answers

    What problem arises when two client stations, located at maximum range to reach in opposite sides of an access point's reach, attempt to communicate simultaneously without being aware of each other's presence?

    <p>Hidden node (or station) problem</p> Signup and view all the answers

    Which functions are typically performed by WRT300N routers in a network?

    <p>wireless Access point, 10/100 switch, and gateway</p> Signup and view all the answers

    Where is the Linksys WRT300N commonly used according to the provided information?

    <p>Small business or residential settings</p> Signup and view all the answers

    What does the term "wireless network mode" refer to in the context of WLAN protocols?

    <p>The wireless standards or protocols supported by the wireless network 802.11a, b, g, or n</p> Signup and view all the answers

    Why do access points typically support both 802.11g and 802.11b standards?

    <p>Because 802.11g is backward compatible with 802.11b</p> Signup and view all the answers

    What mode is a Linksys access point operating in when configured to allow both 802.11b and 802.11g clients?

    <p>Mixed mode</p> Signup and view all the answers

    What is required for an access point to support both 802.11a and 802.11b/g standards simultaneously?

    <p>A second radio to operate in the different RF band</p> Signup and view all the answers

    What is the purpose of the Service Set Identifier (SSID) in wireless networks?

    <p>It identifies the wireless network and distinguishes it from other networks.</p> Signup and view all the answers

    What is the purpose of the Service Set Identifier (SSID) in wireless networks?

    <p>It identifies the wireless network and distinguishes it from other networks.</p> Signup and view all the answers

    What is the relationship between access points and SSIDs in a network, according to the provided information?

    <p>Multiple access points on a network can share the SSID.</p> Signup and view all the answers

    How are wireless channels typically organized in the 2.4 GHz band for North America and Europe, according to the provided information?

    <p>North America has 11 channels, and Europe has 13 channels.</p> Signup and view all the answers

    What is a recommended best practice for WLANs that require multiple access points?

    <p>Setting access points to use non-overlapping channels to minimize interference</p> Signup and view all the answers

    What channel configuration should be used for two adjacent access points?

    <p>Channels 5 and 10</p> Signup and view all the answers

    Who are "war drivers" and what is their primary objective?

    <p>Individuals who seek free internet access</p> Signup and view all the answers

    What are the primary objectives of hackers?

    <p>Finding information or blocking services</p> Signup and view all the answers

    What risk do employees pose?

    <p>Non Approved Access</p> Signup and view all the answers

    What is the primary purpose of a rogue AP set up by hackers?

    <p>Hack the SSID and codes and set up an additional AP that people use so they can capture data</p> Signup and view all the answers

    What is a requirement for mutual authentication in a wireless network?

    <p>Both the client and the access point need to know a key</p> Signup and view all the answers

    What is the primary purpose of encryption in data communication?

    <p>To hide data using a key and algorithm</p> Signup and view all the answers

    What is the primary function of Intrusion Detection Systems (IDS) in the context of intrusion tools?

    <p>to watch for attempts at breaching security</p> Signup and view all the answers

    Which of the following statements accurately describes one of the 2 security vulnerabilities associated with WEP (Wired Equivalent Privacy)?

    <p>Weak security as static Pre Shared Key-keys weren’t changed-if you guess once, you always had it.</p> Signup and view all the answers

    What security weakness is commonly associated with WEP (Wired Equivalent Privacy)?

    <p>Easily Cracked since Sort keys that also had problems in the way they were used.</p> Signup and view all the answers

    What security features are associated with WPA (Wi-Fi Protected Access)?

    <p>Dynamic keys(Uses TKIP) and more secure system</p> Signup and view all the answers

    Which authentication method can WPA (Wi-Fi Protected Access) also utilize?

    <p>802.1x authentication</p> Signup and view all the answers

    Which features are associated with both 802.11i and WPA2 (Wi-Fi Protected Access 2)?

    <p>Dynamic key exchange, stronger encryption, Includes AES-better encryption and user authentication</p> Signup and view all the answers

    Which encryption method is certified as part of WPA (Wi-Fi Protected Access)?

    <p>TKIP</p> Signup and view all the answers

    Which of the following is one of the primary functions of TKIP (Temporal Key Integrity Protocol)?

    <p>Encrypting the Layer 2 payload</p> Signup and view all the answers

    Why is AES encryption the preferred method in WPA2 (Wi-Fi Protected Access 2)?

    <p>Because it is a WLAN encryption standard used in IEEE 802.11i</p> Signup and view all the answers

    How does AES (Advanced Encryption Standard) differ from TKIP (Temporal Key Integrity Protocol) in terms of ensuring data integrity?

    <p>AES has the same functions as TKIP but uses additional data from the MAC header to recognize tampering</p> Signup and view all the answers

    What function does TKIP (Temporal Key Integrity Protocol) perform to ensure data integrity?

    <p>It performs a message integrity check (MIC) in the encrypted packet</p> Signup and view all the answers

    What could be a potential cause of connectivity issues between access points in an extended service set WLAN?

    <p>Channel setting issues between access points</p> Signup and view all the answers

    How can interference be minimized in a wireless network setup with multiple access points?

    <p>By setting the channels at intervals of five channels, such as channel 1, channel 6, and channel 11</p> Signup and view all the answers

    what is one aspect of RF interference problems in wireless networks?

    <p>Incorrect channel settings</p> Signup and view all the answers

    What channel recommendations are suggested for setting WLAN access points in a small environment to avoid interference from consumer items like cordless phones?

    <p>Channel 1 or Channel 11</p> Signup and view all the answers

    Which channel is commonly used by consumer items like cordless phones?

    <p>Channel 6</p> Signup and view all the answers

    Which standards are used in Wireless LANs?

    <p>IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.11ac, IEEE 802.11ax</p> Signup and view all the answers

    What characterizes a Basic Service Set (BSS)?

    <p>Mobile clients use a single access point for connectivity</p> Signup and view all the answers

    Which statement describes an Extended Service Set (ESS)?

    <p>It includes multiple access points that share a common SSID</p> Signup and view all the answers

    Which practices or methods are commonly used for WLAN security?

    <p>MAC address filtering, SSID masking, and Implementing WPA2.</p> Signup and view all the answers

    What configuration steps are recommended for ensuring consistency between a wireless NIC and an access point?

    <p>Configure both the wireless NIC and access point with the same SSID and ensure that the latest firmware is installed</p> Signup and view all the answers

    What configuration steps are recommended for ensuring consistency between a wireless NIC and an access point?

    <p>Configure both the wireless NIC and access point with the same SSID and ensure that the latest firmware is installed</p> Signup and view all the answers

    Which troubleshooting steps are commonly involved in troubleshooting WLANs?

    <p>Checking channel settings and checking for interference</p> Signup and view all the answers

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