WGU: Network & Security Foundations (C-172)
questions with verified answers
(Data) Segments Packets Frames Bits Ans✓✓✓-Some people fear birthdays
(mnemonic device to remember names for data from level 4 to 1) - "Data" is top 3
layers
(Independent) Basic Service Set Ans✓✓✓-(I)BSS - Infrastructure mode - an
independent (ad hoc) network
3G/4G Ans✓✓✓-3rd generation was developed to provide broadband network
wireless services - international mobile communications standard (IMT 2000). 4th
gen is the successor to 3G and provides download speeds of 100Mbps
802.11a (Wireless-A) Ans✓✓✓-This wireless standard can provide data transfer
rates up to 54Mbps and an operating range up to 75 feet. Uses OFDM
(Orthogonal frequency-division multiplexing) modulation technique operating at a
frequency of 5GHz - supports 8 overlapping channels
802.11ac (Wireless-AC) Ans✓✓✓-This is the latest wireless standard. It provides
single-station data transfer rates of 500Mbps and operates in the 5GHz frequency
band
802.11b (Wireless-B) Ans✓✓✓-This wireless standard can provide data transfer
rates up to 11Mbps with ranges of 100-150 feet. Uses DSSS (Direct Sequence
Spread Spectrum) operating at a frequency of 2.4GHz - supports 3 non-
overlapping channels
802.11f Ans✓✓✓-Allows users to maintain a connection while roaming
,802.11g (Wireless-G) Ans✓✓✓-This wireless standard can provide data transfer
rates up to 54Mbps up to 150 feet. Can use either DSSS of OFDM, operates at
2.4GHz
802.11i Ans✓✓✓-Uses the RSN (Robust Security Network) feature, which defines
2 security methodologies: legacy-based hardware using RC4 and new hardware
based on AES (Advanced Encryption Standard)
802.11n (Wireless-N) Ans✓✓✓-This wireless standard provides data transfer
rates up to 4 x 802.11g speeds (200+Mbps). It operates at either 2.4GHz or 5GHz
-- SPEED increases *MIMO (Multiple input multiple output)
802.1x Ans✓✓✓-Improved wireless security by incorporating authentication of
the user by a central authority - user requests access to wireless network via an
AP. Cisco Systems uses LEAP
Absorption Ans✓✓✓-Light interaction with the atomic structure of the fiber
material; also involves the conversion of optical power to heat
Access point Ans✓✓✓-Used to interconnect wireless devices and provide a
connection to the wired LAN
Application Ans✓✓✓-Top layer of the TCP/IP stack. Used to process requests
from hosts and to ensure a connection is made to an appropriate port.
Application layer (layer 7) Ans✓✓✓-Support for applications: Interacts with
application programs that incorporate a communication component such as your
, Internet browser and email. This layer is responsible for logging the message in,
interpreting the request, and determining what info is needed to support the
request. Examples: HTTP, FTP, SMTP
Application Presentation Session Transport Network Data Physical Ans✓✓✓-All
people seem to need data processing (mnemonic device to remember OSI from 7
to 1)
Application, Transport, Internet, Network Interface Ans✓✓✓-The 4 layers of the
TCP/IP model
ASCII JPEG Ans✓✓✓-Function at layer 6 (presentation)
Backscatter Ans✓✓✓-Reflection of radio waves striking the RFID tag and
reflecting back to the transmitter source with its unique id info
Beacon Ans✓✓✓-Verifies integrity of a wireless link
Bits Ans✓✓✓-Data in layer 1 (physical)
Bluetooth Ans✓✓✓-Based on 802.15 standard, developed to replace the cable
connecting devices. Uses paging procedure to determine whether other
bluetooth devices are available. (also allows itself to be discovered) - operates in
the 2.4GHz ISM band
Bridge Ans✓✓✓-An internetworking device that connects two LANs, making
them to appear to be one. *Can be a rooftop antenna for wifi
questions with verified answers
(Data) Segments Packets Frames Bits Ans✓✓✓-Some people fear birthdays
(mnemonic device to remember names for data from level 4 to 1) - "Data" is top 3
layers
(Independent) Basic Service Set Ans✓✓✓-(I)BSS - Infrastructure mode - an
independent (ad hoc) network
3G/4G Ans✓✓✓-3rd generation was developed to provide broadband network
wireless services - international mobile communications standard (IMT 2000). 4th
gen is the successor to 3G and provides download speeds of 100Mbps
802.11a (Wireless-A) Ans✓✓✓-This wireless standard can provide data transfer
rates up to 54Mbps and an operating range up to 75 feet. Uses OFDM
(Orthogonal frequency-division multiplexing) modulation technique operating at a
frequency of 5GHz - supports 8 overlapping channels
802.11ac (Wireless-AC) Ans✓✓✓-This is the latest wireless standard. It provides
single-station data transfer rates of 500Mbps and operates in the 5GHz frequency
band
802.11b (Wireless-B) Ans✓✓✓-This wireless standard can provide data transfer
rates up to 11Mbps with ranges of 100-150 feet. Uses DSSS (Direct Sequence
Spread Spectrum) operating at a frequency of 2.4GHz - supports 3 non-
overlapping channels
802.11f Ans✓✓✓-Allows users to maintain a connection while roaming
,802.11g (Wireless-G) Ans✓✓✓-This wireless standard can provide data transfer
rates up to 54Mbps up to 150 feet. Can use either DSSS of OFDM, operates at
2.4GHz
802.11i Ans✓✓✓-Uses the RSN (Robust Security Network) feature, which defines
2 security methodologies: legacy-based hardware using RC4 and new hardware
based on AES (Advanced Encryption Standard)
802.11n (Wireless-N) Ans✓✓✓-This wireless standard provides data transfer
rates up to 4 x 802.11g speeds (200+Mbps). It operates at either 2.4GHz or 5GHz
-- SPEED increases *MIMO (Multiple input multiple output)
802.1x Ans✓✓✓-Improved wireless security by incorporating authentication of
the user by a central authority - user requests access to wireless network via an
AP. Cisco Systems uses LEAP
Absorption Ans✓✓✓-Light interaction with the atomic structure of the fiber
material; also involves the conversion of optical power to heat
Access point Ans✓✓✓-Used to interconnect wireless devices and provide a
connection to the wired LAN
Application Ans✓✓✓-Top layer of the TCP/IP stack. Used to process requests
from hosts and to ensure a connection is made to an appropriate port.
Application layer (layer 7) Ans✓✓✓-Support for applications: Interacts with
application programs that incorporate a communication component such as your
, Internet browser and email. This layer is responsible for logging the message in,
interpreting the request, and determining what info is needed to support the
request. Examples: HTTP, FTP, SMTP
Application Presentation Session Transport Network Data Physical Ans✓✓✓-All
people seem to need data processing (mnemonic device to remember OSI from 7
to 1)
Application, Transport, Internet, Network Interface Ans✓✓✓-The 4 layers of the
TCP/IP model
ASCII JPEG Ans✓✓✓-Function at layer 6 (presentation)
Backscatter Ans✓✓✓-Reflection of radio waves striking the RFID tag and
reflecting back to the transmitter source with its unique id info
Beacon Ans✓✓✓-Verifies integrity of a wireless link
Bits Ans✓✓✓-Data in layer 1 (physical)
Bluetooth Ans✓✓✓-Based on 802.15 standard, developed to replace the cable
connecting devices. Uses paging procedure to determine whether other
bluetooth devices are available. (also allows itself to be discovered) - operates in
the 2.4GHz ISM band
Bridge Ans✓✓✓-An internetworking device that connects two LANs, making
them to appear to be one. *Can be a rooftop antenna for wifi
