1.Wavelength can be described as…
The distance between successive crests of a wave
2.What is the wavelength of AM radio waves?
3.What is the wavelength of satellite waves?
4.As frequency increases, distance travelled
5. 1mhz is 1 million cycles per second
6. 1ghz is 1 billion cycles per second
7. Gain provided by antennae helps to cancel out ___________ from cabling
8.The EIRP calculation is…
EIRP = transmitter O/P power – cable loss + antenna gain
9.Free path loss is a result of attenuation and not interference
10. As amplitude increases range increases
11.Reduction of amplitude is aka absorption
12.Absorption creates heat
13.The main issue presented by reflection is Multi path interference
14.What is multipath interference?
When two copies of the same signal arrive out of phase with eachother, and weaken or cancel eachother out
15.What is scattering
When a signal is reflected by objects which are reflective but have jagged edges
16.What is refraction
The changing or bending of a wave as it passes through something of a different density
17.Dryness refracts signals away from earth
18.Humidity refracts signals towards earth
19.RSSI is received signal strength indicator
20.A potential replacement for RSSI is receive channel power indicator
21.What is SNR?
Signal to noise ratio, how much stronger a received signal is than the underlying noise, it is measured in dB
22.What is link budget?
Value which accounts for gains/losses between tx and rx
23.What is the link budget equation?
Received power (dBm) = (tx power + gains – losses)
24.3 types of polarization for antennae are:
25.In an electromagnetic field, the magnetic field is perpendicular to the electric field
26.Cisco antennae all have vertical polarization
27.What is diversity?
The use of two antennae for each radio to increase the odds of a better signal
28.What has to be the same about each antennae in a diversity scenario?
29.Diversity is used to fight…
Multi path interference issues
30. 2 main types of antennae are
31. The h-plane of an antenna is aka
32.The e-plane shows how a signal would propagate vertically
33.The 2.2 dBi dipole antenna is aka the rubber ducky antenna
34.The loss incurred by a cable is usually referred to as the cable loss specification
35.3 types of antenna connectors are…
3) SMA (2 types)
36.2 subtypes of SMA connectors are
RP-SMA and SMA-RS
37.Attenuators reduce signal
38.Amplifiers add active gain to compensate for cable loss
39.Active gain means gain is added without focus change
40.What shunts lightning surges before they reach the wired LAN lightning arrestors
41.Do lightning arrestors protected against direct strikes?
42.What are used to send a signal in two different directions?
43.The range of a WPAN would be..
<5-10m, or 20 feet
44.WPAN’s use the 2.4ghz spectrum
45.Bluetooth is an example of a WPAN
46.Bluetooth uses what for an emission method
47.Generally, clients in a WLAN are _______ or less from the access point
48.An example of a WMAN is WiMAX
49.WiMAX could possibly replace T1 AND T3 technologies
50.Is it ideal for a WMAN to use ISM frequencies?
51.Do WWAN’s have high data rates?
52.The most popular versions of WWAN’s are… (2)
53.Two original versions of 802.11 topologies:
1) Ad-hoc, no central point
2) Infrastructure, has a central point
54.The coverage area of an AP is called the
55.The wired network is aka the…
56.2 or more BSA’s make an…
57.The process of clients moving AP’s called…
58.An SSID is a combination of what two things
MAC address and network name
59.AP’s can have up to __ SSID’s
60.An AP offering more than one NW called a
61.What is an AWGB
Connects to upstream AP’s and allows wired ethernet clients to connect as non-standard clients
62.What is an UWGB
Allows single wired device to be bridged upstream to an AP as a standard device
63.Overlap needed for a wireless repeater is…
64.Original AP in a repeated wireless network is called…
The root device
65.Outdoor wireless bridges operate at what layer of the OSI model
66.What is used to determine the best path in a wireless mesh network?