WGU C172 Network and Security – Foundations
questions with verified answers
1000BaseFX Ans✓✓✓-1000Mbps over fiber
1000BaseT Ans✓✓✓-Gigabit Ethernet. 1000Mbps over twisted-pair
100BaseFX Ans✓✓✓-100Mbps over fiber
100BaseT Ans✓✓✓-Fast Ethernet. 100Mbps over twisted-pair
10Base2 Ans✓✓✓-ThinNet. 10Mbps over coax, up to 185 m
10Base5 Ans✓✓✓-ThickNet. 10Mbps over coax, up to 500 m
10BaseF Ans✓✓✓-10Mbps over multimode fiber-optic cable
10BaseFL Ans✓✓✓-10Mbps over 850 nm multimode fiber-optic cable
10BaseT Ans✓✓✓-10Mbps over twisted-pair
10GBaseT Ans✓✓✓-Another name for 10GE when over copper
10GE Ans✓✓✓-10Gb Ethernet
,1518 bytes Ans✓✓✓-Maximum length of an Ethernet frame
3 basic steps to isolate network problem Ans✓✓✓-Is the connection to the
machine down? (layer 1)
Is the network down? (layer 3)
Is a service on a specific machine down? (layer 7)
3 blocks for private IP addresses Ans✓✓✓-10.0.0.0-10.255.255.255
172.16.0.0-172.31.255.255
192.168.0.0-192.168.255.255
3 types of IPv6 address Ans✓✓✓-unicast
multicast
anycast
64 bytes Ans✓✓✓-Minimum length of an Ethernet frame
6to4 prefix Ans✓✓✓-A technique that enables IPv6 hosts to communicate over
the IPv4 Internet
802.11a Ans✓✓✓-Wireless standard, 54Mbps, 75 ft, 5Ghz
802.11ac Ans✓✓✓-Latest wireless standard, single-station data transfer rates of
500Mbps, 5Ghz
, 802.11b Ans✓✓✓-Wireless standard, 11Mbps, 100-150 ft, 2.4GHz
802.11g Ans✓✓✓-Wireless standard, 54Mbps, 150 ft, 2.4GHz
802.11i Ans✓✓✓-WLANs standard providing improved data encryption for
802.11a, 802.11b, and 802.11g
802.11n Ans✓✓✓-Wireless standard, 4 x 802.11g speeds (200+Mbps). 2.4GHz or
5GHz
802.11r Ans✓✓✓-WLAN standard is designed to speed hand-offs between access
points/cells, critical for VoIP
absorption Ans✓✓✓-Light interaction with the atomic structure of the fiber
material; also involves the conversion of optical power to heat
access lists (ACLs) Ans✓✓✓-A basic form of firewall protection
access point Ans✓✓✓-A transceiver used to interconnect a wireless and a wired
LAN
ACR Ans✓✓✓-Compares the signal level from a transmitter at the far end to the
crosstalk measured at the near end
ad hoc Ans✓✓✓-Another term used to describe an independent network
questions with verified answers
1000BaseFX Ans✓✓✓-1000Mbps over fiber
1000BaseT Ans✓✓✓-Gigabit Ethernet. 1000Mbps over twisted-pair
100BaseFX Ans✓✓✓-100Mbps over fiber
100BaseT Ans✓✓✓-Fast Ethernet. 100Mbps over twisted-pair
10Base2 Ans✓✓✓-ThinNet. 10Mbps over coax, up to 185 m
10Base5 Ans✓✓✓-ThickNet. 10Mbps over coax, up to 500 m
10BaseF Ans✓✓✓-10Mbps over multimode fiber-optic cable
10BaseFL Ans✓✓✓-10Mbps over 850 nm multimode fiber-optic cable
10BaseT Ans✓✓✓-10Mbps over twisted-pair
10GBaseT Ans✓✓✓-Another name for 10GE when over copper
10GE Ans✓✓✓-10Gb Ethernet
,1518 bytes Ans✓✓✓-Maximum length of an Ethernet frame
3 basic steps to isolate network problem Ans✓✓✓-Is the connection to the
machine down? (layer 1)
Is the network down? (layer 3)
Is a service on a specific machine down? (layer 7)
3 blocks for private IP addresses Ans✓✓✓-10.0.0.0-10.255.255.255
172.16.0.0-172.31.255.255
192.168.0.0-192.168.255.255
3 types of IPv6 address Ans✓✓✓-unicast
multicast
anycast
64 bytes Ans✓✓✓-Minimum length of an Ethernet frame
6to4 prefix Ans✓✓✓-A technique that enables IPv6 hosts to communicate over
the IPv4 Internet
802.11a Ans✓✓✓-Wireless standard, 54Mbps, 75 ft, 5Ghz
802.11ac Ans✓✓✓-Latest wireless standard, single-station data transfer rates of
500Mbps, 5Ghz
, 802.11b Ans✓✓✓-Wireless standard, 11Mbps, 100-150 ft, 2.4GHz
802.11g Ans✓✓✓-Wireless standard, 54Mbps, 150 ft, 2.4GHz
802.11i Ans✓✓✓-WLANs standard providing improved data encryption for
802.11a, 802.11b, and 802.11g
802.11n Ans✓✓✓-Wireless standard, 4 x 802.11g speeds (200+Mbps). 2.4GHz or
5GHz
802.11r Ans✓✓✓-WLAN standard is designed to speed hand-offs between access
points/cells, critical for VoIP
absorption Ans✓✓✓-Light interaction with the atomic structure of the fiber
material; also involves the conversion of optical power to heat
access lists (ACLs) Ans✓✓✓-A basic form of firewall protection
access point Ans✓✓✓-A transceiver used to interconnect a wireless and a wired
LAN
ACR Ans✓✓✓-Compares the signal level from a transmitter at the far end to the
crosstalk measured at the near end
ad hoc Ans✓✓✓-Another term used to describe an independent network
