Ch. 15 Packet Flashcards
Which standard is the common wireless networking standard?
IEEE 802.11
Which term represents the condition of whether a wireless device is connected?
Link state
Which term represents a measurement of how well a wireless device is connecting to other devices?
Signal strength
Which wireless network mode operates by allowing two or more PCs to communicate directly with-out cabling or any other intermediary hardware?
Ad hoc
What type of unit is formed by two or more wireless nodes communicating in ad hoc mode?
Independent Basic Service Set (IBSS)
What type of unit is formed by a single WAP servicing a given area?
Basic Service Set (BSS)
What type of unit is formed by a single wireless access point servicing a given area that has been extended by adding more access points?
Extended Service Set (ESS)
Which term defines the most basic infrastructure mode network – a BSS of one WAP and one or more wireless nodes?
Basic Service Set Identifier (BSSID)
What is used as the Basic Service Set Identifier (BSSID) for a Basic Service Set (BSS)?
The MAC address of the WAP
What do wireless nodes in an Independent Basic Service Set (IBSS) use in place of the Basic Ser-vice Set Identifier (BSSID value in each frame?
A randomly generated value
Which term did Wi-Fi people create to use as another level of naming to describe a standard name applied to the BSS or IBSS to help the connection happen?
Service Set Identifier (SSID)
Which spread-spectrum broadcasting method sends data out on different frequencies at the same time?
DSSS
Which term describes a portion of the available spectrum available for Wi-Fi network communication?
Channel
How many channels were defined by the 802.11 standard?
14
Which of the channels defined by the 802.11 standard may be used by a WAP using the 2.4-GHz band in the United States?
1 through 11
__________ broadcasts data in small, discrete chunks over the different frequencies available within a certain frequency range.
Spread-spectrum
Which 802.11 collision avoidance method is currently implemented?
Distributed Coordination Function (DCF)
What happens when frames are transmitted on the network from two different devices at the same time, corrupting each other’s signals?
A collision occurs.
Which term describes the predetermined silence period that is added to the length of a packet to determine the waiting period for a network device after it has detected traffic on the media?
Interframe gap
Which Wi-Fi standard offers speeds of up to 54 Mbps, a range of up to about 300 feet, operates in the 2.4 GHz frequency, and is backward-compatible with an earlier, popular Wi-Fi standard?
802.11g
Which Wi-Fi standard offers speeds of up to 100 Mbps (or higher), a range of up to about 300 feet, and operates in the 2.4-GHz and 5.0-GHz frequencies?
802.11n
Which term describes a method that enables an administrator to limit access to a network based on the physical addresses of wireless NICs?
MAC address filtering
Which standard includes secure authentication using a RADIUS server and password encryption using EAP?
IEEE 802.1X
Which statement describes a weakness in WEP that allows it to be easily cracked?
The size of the encryption key
Which key sizes does WEP use?
40 bits and 104 bits
Which term describes a graphical representation of the radio frequency (RF) sources on a site?
Heat map
What is the gain of the typical WAP antenna?
2 dB
Which settings should be modified when there are overlapping Wi-Fi signals?
Channel and frequency
Which wireless bridge can talk to more than one other bridge at a time and can connect multiple network segments?
Point-to-multipoint
Which wireless bridge can only communicate with a single other bridge and are used to connect two wireless network segments?
Point-to-point
One of the big challenges to larger enterprise networks are the large number of clients that might be on a single __________ at any given moment.
SSID
A(n) __________ access point is simply an unauthorized access point (AP).
rogue
