WGU - MSCSIA - C700 - Secure Network Design – 2019| 674
QUESTIONS WITH COMPLETE ANSWERS
What happened September 15th 2016? Correct Answer: Brian Krebs, (KrepsOnSecurity) was
DDoS'd with Mirai
On what day was Brian Krebs attacked? Correct Answer: September 15th 2016
What was Mirai? Correct Answer: The Botnet that was used against Brian Krebs on September
15th 2016
It sent 620 Gbps of traffic
Was over 2x the amount Akamai had ever encountered
It used the IoT such as DVRs, security cameras and home routers
What is the IoT? Correct Answer: Internet of Things
Connected devices aka smart devices
Smart TVs, Smart Thermostats, Smart Fridges, Smart Speakers etc
What is Dyn? Correct Answer: A DNS hosting service that was hit by Mirai. It was used by
Netflix, Tumblr, Amazon, Twitter, Spotify and Tumblr
When did the internet first become commercial? Correct Answer: 1995
Prior to that the "Internet's Acceptable Use Policy" prohibited commercial use because it was
supported by the National Science Foundation (NSF).
In 1995 NSF pulled out and the internet became commercial
What is an ISP? Correct Answer: Internet Service Provider
What are hosts? Correct Answer: All computers connected to a network that participate directly
in network communication are classified as hosts.
Hosts are also called end devices.
What is e-commerce? Correct Answer: Conducting business on the internet (buying/selling on
the internet)
What accounts for 33% of the internet's traffic? Correct Answer: Netflix
,What network came before the internet? Correct Answer: ARPNET
When was the internet created? Correct Answer: Late 1970s
Who sets standards for the internet? Correct Answer: Internet Engineering Task Force (IETF)
But standards are optional
Who controls internet addresses? Correct Answer: Internet Assigned Name Authority (IANA)
Word/Phrase Correct Answer: Definition
2.4 GHz Unlicensed Service Band Correct Answer: Unlicensed frequency band around 2.4 GHz.
Used for Wi-Fi, Bluetooth, and other services.
4-Pair Unshielded Twisted Pair (UTP) Correct Answer: The type of wiring typically used in
Ethernet networks. 4-pair UTP contains eight copper wires organized as four pairs. Each wire is
covered with dielectric insulation, and an outer jacket encloses and protects the four pairs.
5 GHz Unlicensed Service Band Correct Answer: Unlicensed radio band around 5 GHz. Used
for Wi-Fi and other services.
64-bit modified extended unique identifier (EUI-64) Correct Answer: In most IPv6 addresses,
the interface ID that specifies a particular device on a subnet is 64 bits long. Typically the 64-bit
address is derived from a 48-bit EUI-48 address (formerly called a MAC address). If so, it is a
modified extended unique identifier (EUI-64).
802 LAN/MAN Standards Committee Correct Answer: The IEEE committee responsible for
Ethernet standards.
802.11ac Correct Answer: In W-Fi, the fastest physical transmission standard for sale today.
802.11ad Correct Answer: 802.11 physical layer standard in the 60 Ghz unlicensed band. Has a
theoretical top speed of 7 Gbps.
802.11ax Correct Answer: Planned successor to the 802.11ac standard. Will be able to
accommodate a substantial increase in density—the number of wireless hosts that can be served
by an access point.
802.11ay Correct Answer: In the 60 GHz band, the Wi-Fi successor to 802.11ad. Adds MU-
MIMO and other improvements, should raise the basic speed to 20 to 30 Gbps and is likely to
allow bonding for even higher speeds. Under development.
802.11i Correct Answer: An advanced form of 802.11 wireless LAN security.
,802.11n Correct Answer: Version of the 802.11 WLAN standard that uses MIMO and
sometimes doubled bandwidth to achieve a rated speed of 100 Mbps or more and longer range
than earlier speed standards.
802.1X Authentication Server Correct Answer: Authentication server used in 802.1X initial
authentication mode.
802.1X Authenticator Correct Answer: In Wi-Fi transmission, the wireless access point.
802.1X Initial Authentication Mode Correct Answer: An initial authentication mode used in
802.11i. Requires the use of an authentication server. Called enterprise mode by the Wi-Fi
Alliance.
802.1X Port-Based Network Access Control Correct Answer: In Ethernet, a standard for access
control on switch ports.
802.3 MAC Layer Standard Correct Answer: The data link layer standard for Ethernet.
802.3 Working Group Correct Answer: Working group in the IEEE 802 LAN/MAN Standards
Committee that creates Ethernet standards.
Absorptive Attenuation Correct Answer: In wireless transmission, the attenuation of a signal but
water along the way absorbing its signal power. In optical fiber, attenuation due to the absorption
of signal strength as a signal propagates.
Access Card Correct Answer: Small card with a magnetic stripe or microprocessor that gives
you access to your computer or to a room.
Access Control List (ACL) Correct Answer: An ordered list of pass/deny rules for a firewall or
other device.
Access Control Correct Answer: Limiting who may have access to each resource and limiting
his or her permissions when using the resource.
Access Link Correct Answer: In networks, a transmission line that connects a station to a
switch. In telephony, the line used by the customer to reach the PSTN's central transport core.
Acknowledgment (ACK) Correct Answer: An acknowledgment message, sent by the receiver
when a message is received correctly. An acknowledgment frame, sent by the receiver whenever
a frame is received; used in CSMA/CA+ACK in 802.11.
Acknowledgment Number Field Correct Answer: In TCP, a header field that tells what TCP
segment is being acknowledged in a segment.
Ad-hoc wireless network Correct Answer: A self-organizing wireless network.
, ADSL Modem Correct Answer: Modem used in Asynchronous Digital Subscriber line service.
Terminates the carrier's connection.
Advanced Persistent Threat (APT) Correct Answer: Attack occurring over a long period of time.
The user employs many advanced methods to get deeper and deeper into the target system.
Advanced Research Projects Agency (ARPA) Correct Answer: An agency within the U.S.
Department of Defense that funded the creation of the ARPANET and the Internet.
Advertisement Message Correct Answer: Bluetooth LE clients periodically send this type of
message to advertise their presence.
Aggregate Throughput Correct Answer: Throughput shared by multiple users; individual users
will get a fraction of this throughput.
Agility Correct Answer: The ability to rapidly change how the network operates when
conditions change.
Alphanumeric Correct Answer: Strictly speaking, letters and numbers. However, often used to
refer to all keyboard characters and, often, some control codes.
Alternative States Correct Answer: In physical transmission, a change in a transmission medium
that can signal one data pattern that represents a particular bit pattern. Different (alternative)
states signal different bit patterns.
Amazon Web Services (AWS) Correct Answer: A cloud service provided by Amazon.
American Standard Code for Information Interchange (ASCII) Correct Answer: Code for
representing all American keyboard characters plus some control codes.
Amplitude Correct Answer: The maximum (or minimum) intensity of a wave. In sound, this
corresponds to volume (loudness).
Antenna Correct Answer: A physical structure that transmits radio signals.
Antivirus (AV) Program Correct Answer: Program to remove malware from arriving messages
and from the computer's disk drive.
Application Architecture Correct Answer: The arrangement of how application layer functions
are spread among computers to deliver service to users.
Application Messages Correct Answer: A message sent from one networked application to
another over a network.
Application Program Interfaces (API) Correct Answer: A standardized interface between
programs.
QUESTIONS WITH COMPLETE ANSWERS
What happened September 15th 2016? Correct Answer: Brian Krebs, (KrepsOnSecurity) was
DDoS'd with Mirai
On what day was Brian Krebs attacked? Correct Answer: September 15th 2016
What was Mirai? Correct Answer: The Botnet that was used against Brian Krebs on September
15th 2016
It sent 620 Gbps of traffic
Was over 2x the amount Akamai had ever encountered
It used the IoT such as DVRs, security cameras and home routers
What is the IoT? Correct Answer: Internet of Things
Connected devices aka smart devices
Smart TVs, Smart Thermostats, Smart Fridges, Smart Speakers etc
What is Dyn? Correct Answer: A DNS hosting service that was hit by Mirai. It was used by
Netflix, Tumblr, Amazon, Twitter, Spotify and Tumblr
When did the internet first become commercial? Correct Answer: 1995
Prior to that the "Internet's Acceptable Use Policy" prohibited commercial use because it was
supported by the National Science Foundation (NSF).
In 1995 NSF pulled out and the internet became commercial
What is an ISP? Correct Answer: Internet Service Provider
What are hosts? Correct Answer: All computers connected to a network that participate directly
in network communication are classified as hosts.
Hosts are also called end devices.
What is e-commerce? Correct Answer: Conducting business on the internet (buying/selling on
the internet)
What accounts for 33% of the internet's traffic? Correct Answer: Netflix
,What network came before the internet? Correct Answer: ARPNET
When was the internet created? Correct Answer: Late 1970s
Who sets standards for the internet? Correct Answer: Internet Engineering Task Force (IETF)
But standards are optional
Who controls internet addresses? Correct Answer: Internet Assigned Name Authority (IANA)
Word/Phrase Correct Answer: Definition
2.4 GHz Unlicensed Service Band Correct Answer: Unlicensed frequency band around 2.4 GHz.
Used for Wi-Fi, Bluetooth, and other services.
4-Pair Unshielded Twisted Pair (UTP) Correct Answer: The type of wiring typically used in
Ethernet networks. 4-pair UTP contains eight copper wires organized as four pairs. Each wire is
covered with dielectric insulation, and an outer jacket encloses and protects the four pairs.
5 GHz Unlicensed Service Band Correct Answer: Unlicensed radio band around 5 GHz. Used
for Wi-Fi and other services.
64-bit modified extended unique identifier (EUI-64) Correct Answer: In most IPv6 addresses,
the interface ID that specifies a particular device on a subnet is 64 bits long. Typically the 64-bit
address is derived from a 48-bit EUI-48 address (formerly called a MAC address). If so, it is a
modified extended unique identifier (EUI-64).
802 LAN/MAN Standards Committee Correct Answer: The IEEE committee responsible for
Ethernet standards.
802.11ac Correct Answer: In W-Fi, the fastest physical transmission standard for sale today.
802.11ad Correct Answer: 802.11 physical layer standard in the 60 Ghz unlicensed band. Has a
theoretical top speed of 7 Gbps.
802.11ax Correct Answer: Planned successor to the 802.11ac standard. Will be able to
accommodate a substantial increase in density—the number of wireless hosts that can be served
by an access point.
802.11ay Correct Answer: In the 60 GHz band, the Wi-Fi successor to 802.11ad. Adds MU-
MIMO and other improvements, should raise the basic speed to 20 to 30 Gbps and is likely to
allow bonding for even higher speeds. Under development.
802.11i Correct Answer: An advanced form of 802.11 wireless LAN security.
,802.11n Correct Answer: Version of the 802.11 WLAN standard that uses MIMO and
sometimes doubled bandwidth to achieve a rated speed of 100 Mbps or more and longer range
than earlier speed standards.
802.1X Authentication Server Correct Answer: Authentication server used in 802.1X initial
authentication mode.
802.1X Authenticator Correct Answer: In Wi-Fi transmission, the wireless access point.
802.1X Initial Authentication Mode Correct Answer: An initial authentication mode used in
802.11i. Requires the use of an authentication server. Called enterprise mode by the Wi-Fi
Alliance.
802.1X Port-Based Network Access Control Correct Answer: In Ethernet, a standard for access
control on switch ports.
802.3 MAC Layer Standard Correct Answer: The data link layer standard for Ethernet.
802.3 Working Group Correct Answer: Working group in the IEEE 802 LAN/MAN Standards
Committee that creates Ethernet standards.
Absorptive Attenuation Correct Answer: In wireless transmission, the attenuation of a signal but
water along the way absorbing its signal power. In optical fiber, attenuation due to the absorption
of signal strength as a signal propagates.
Access Card Correct Answer: Small card with a magnetic stripe or microprocessor that gives
you access to your computer or to a room.
Access Control List (ACL) Correct Answer: An ordered list of pass/deny rules for a firewall or
other device.
Access Control Correct Answer: Limiting who may have access to each resource and limiting
his or her permissions when using the resource.
Access Link Correct Answer: In networks, a transmission line that connects a station to a
switch. In telephony, the line used by the customer to reach the PSTN's central transport core.
Acknowledgment (ACK) Correct Answer: An acknowledgment message, sent by the receiver
when a message is received correctly. An acknowledgment frame, sent by the receiver whenever
a frame is received; used in CSMA/CA+ACK in 802.11.
Acknowledgment Number Field Correct Answer: In TCP, a header field that tells what TCP
segment is being acknowledged in a segment.
Ad-hoc wireless network Correct Answer: A self-organizing wireless network.
, ADSL Modem Correct Answer: Modem used in Asynchronous Digital Subscriber line service.
Terminates the carrier's connection.
Advanced Persistent Threat (APT) Correct Answer: Attack occurring over a long period of time.
The user employs many advanced methods to get deeper and deeper into the target system.
Advanced Research Projects Agency (ARPA) Correct Answer: An agency within the U.S.
Department of Defense that funded the creation of the ARPANET and the Internet.
Advertisement Message Correct Answer: Bluetooth LE clients periodically send this type of
message to advertise their presence.
Aggregate Throughput Correct Answer: Throughput shared by multiple users; individual users
will get a fraction of this throughput.
Agility Correct Answer: The ability to rapidly change how the network operates when
conditions change.
Alphanumeric Correct Answer: Strictly speaking, letters and numbers. However, often used to
refer to all keyboard characters and, often, some control codes.
Alternative States Correct Answer: In physical transmission, a change in a transmission medium
that can signal one data pattern that represents a particular bit pattern. Different (alternative)
states signal different bit patterns.
Amazon Web Services (AWS) Correct Answer: A cloud service provided by Amazon.
American Standard Code for Information Interchange (ASCII) Correct Answer: Code for
representing all American keyboard characters plus some control codes.
Amplitude Correct Answer: The maximum (or minimum) intensity of a wave. In sound, this
corresponds to volume (loudness).
Antenna Correct Answer: A physical structure that transmits radio signals.
Antivirus (AV) Program Correct Answer: Program to remove malware from arriving messages
and from the computer's disk drive.
Application Architecture Correct Answer: The arrangement of how application layer functions
are spread among computers to deliver service to users.
Application Messages Correct Answer: A message sent from one networked application to
another over a network.
Application Program Interfaces (API) Correct Answer: A standardized interface between
programs.
