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Net+ > Deploying And Troubleshooting Wireless Networks > Flashcards

Deploying And Troubleshooting Wireless Networks Flashcards

1
Q

IEEE standards for wireless networking based on spread spectrum radio transmission in the 2.4 GHz and 5 GHz bands. The standard, known as WiFi, has six main iterations: a, b, g, WiFi 4n, WiFi 5ac, and Wifi 6ax. These specify different modulation techniques, supported distances and data rates, plus special features such as channel bonding, MIMO and MU-MIMO

A

802.11 standards

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2
Q

Mechanism used by 802.11 WiFi standards to cope with contention over the shared access media

A

Carrier Sense Multiple Access with Collision Avoidance (CSNA/CA)

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3
Q

Portion of the radio frequency spectrum in which wireless products operate, such as 2.4 GHz band or 5GHz band.

A

Frequency band

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4
Q

Subdivision of frequency bands used by WiFi products into smaller channels to allow multiple networks to operate at the same location without interfering with one another.

A

Channel

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5
Q

Use of multiple reception and transmission antennas to boost bandwidth via spatial multiplexing and to boost range and signal reliability via spatial diversity

A

Multiple input multiple output (MIMO)

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6
Q

Capability to aggregate one or more adjacent channels to increase bandwidth

A

Channel bonding

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7
Q

Use of spatial multiplexing to connect multiple MU-MIMO capable station’s simultaneously, providing the stations are not in the same directional path

A

Multiuser MIMO (MU-MIMO)

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8
Q

Mobile telephony standards divided into 2G (GSM; up to about 14 Kbps), 2.5G (GPRS, HSCSD, and EDGE; up to about 48 Kbps) and 3G (WCDMA; up to about 2 Mbps)

A

Cellular radio

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9
Q

Standard for cellular radio communications and data transfer. These phones use a SIM card to identify the subscriber and network provider. 4G and later data standards are developed for this.

A

Global system for mobile communication (GSM)

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10
Q

Method of multiplexing a communications channel using a code to key the modulation of a particular signal. CDMA is associated with Sprint and Verizon cellular networks.

A

Code Division Multiple Access (CDMA)

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11
Q

Packet data communications specification providing an upgrade path for both GSM and CDMA2000 cellular networks. Advanced version is designed to provide 4G standard network access.

A

Long term evolution (LTE)

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12
Q

Device that provides a connection between wireless devices and can connect to wired networks, implementing an infrastructure mode WLAN

A

Access point (AP)

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13
Q

MAC address if an access point supporting a basic service arwa

A

Basic service set identifier (BSSID)

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14
Q

Character string that identifies a particular wireless LAN (WLAN)

A

Service set identifier (SSID)

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15
Q

Network name configured in multiple access points to form an extended service area

A

Extended service set identifier (ESSID)

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16
Q

Documentation about a location for the purposes of building an ideal wireless Infrastructure; it often contains optimum locations for wireless antenna and access point placement to provide the required coverage for clients and identifying sources of interference

A

Site survey

17
Q

In a WiFi site survey a diagram showing signal strength and channel utilization at different locations.

A

Heat map

18
Q

WLAN configured with multiple access points in an extended service set allowing clients to remain connected to the network within an extended service area.

A

Roaming

19
Q

Device that provides wireless LAN management for multiple APs

A

Wireless LAN controller

20
Q

Access point whose firmware contains enough processing logic to be able to function autonomously and handle clients without the use of a wireless controller

A

Fat AP

21
Q

Access point for hat requires a wireless controller in order to function

A

Thin AP

22
Q

Type of wireless network where connected devices communicate directly with each other instead of over an established medium.

A

Independent Basic Service Set (IBSS)

23
Q

Loss of signal strength due to distance and environmental factors

A

Radio frequency (RF) attenuation

24
Q

Signal strength as measured at the receiver using either decibel units or an index value

A

Received signal strength indicator (RSSI)

25
Q

Device or software that can report characteristics of a WLAN such as signal strength and channel utilization

A

WiFi analyzer

26
Q

Specially arranged metal wires that can send and receive radio signals typically implemented as either an omnidirectional or a unidirectional type.

A

Antenna type

27
Q

Orientation of the wave propagating from antenna

A

Polarization

28
Q

Signal loss caused by an external antenna connected to an access point over cabling

A

Antenna cable attenuation

29
Q

Signal strength from a transmitter, measured as the sun of transmit power, antenna cable/connector loss and antenna gain

A

Effective isotopic radiated power (EIRP)

30
Q

Troubleshooting issue where access points within range of one another are configured to use the same channel, causing increased contention

A

Co-channel interference (CCI)

31
Q

Troubleshooting issue where access points within range of one another are configured to use different but overlapping channels causing increased noise

A

Adjacent channel interference (ACI)

32
Q

Device that can detect the source of interference on a wireless network

A

Spectrum analyzer

33
Q

Standards for authentication and encrypting access to WiFi networks

A

WiFi Protected Access (WPA)

34
Q

Wireless network authentication mode where a passphrase-based mechanism is used to allow group authentication to a wireless network. The pass phrase is used to derive an encryption key.

A

Pre-shared key (PSK)

35
Q

Personal authentication mechanism for WiFi networks introduced with WPA3 to address vulnerabilities in the WPA-PSK method

A

Simultaneous authentication of equals (SAE)

36
Q

Wireless network authentication mode where the access point acts as pass through for credentials that are verified by an AAA server

A

Enterprise authentication

37
Q

Management frame handling process by which a station is disconnected from an access point

A

Disassociation

38
Q

Wireless network authentication mode where guest (unauthenticated) access is permitted.

A

Open authentication

39
Q

Web page or website to which a client is redirected before being granted full network access

A

Captive portal

Net+ (18 decks)

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