WGU - MSCSIA - C700 - Secure Network
Design - 2019
What happened September 15th 2016? - ✔✔Brian Krebs, (KrepsOnSecurity) was
DDoS'd with Mirai
On what day was Brian Krebs attacked? - ✔✔September 15th 2016
What was M
...
WGU - MSCSIA - C700 - Secure Network
Design - 2019
What happened September 15th 2016? - ✔✔Brian Krebs, (KrepsOnSecurity) was
DDoS'd with Mirai
On what day was Brian Krebs attacked? - ✔✔September 15th 2016
What was Mirai? - ✔✔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? - ✔✔Internet of Things
Connected devices aka smart devices
Smart TVs, Smart Thermostats, Smart Fridges, Smart Speakers etc
What is Dyn? - ✔✔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? - ✔✔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? - ✔✔Internet Service Provider
What are hosts? - ✔✔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? - ✔✔Conducting business on the internet (buying/selling on the
internet)
What accounts for 33% of the internet's traffic? - ✔✔Netflix
What network came before the internet? - ✔✔ARPNET
When was the internet created? - ✔✔Late 1970s
Who sets standards for the internet? - ✔✔Internet Engineering Task Force (IETF)
But standards are optional
Who controls internet addresses? - ✔✔Internet Assigned Name Authority (IANA)
Word/Phrase - ✔✔Definition
2.4 GHz Unlicensed Service Band - ✔✔Unlicensed frequency band around 2.4 GHz.
Used for Wi-Fi, Bluetooth, and other services.
4-Pair Unshielded Twisted Pair (UTP) - ✔✔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 - ✔✔Unlicensed radio band around 5 GHz. Used for
Wi-Fi and other services.
64-bit modified extended unique identifier (EUI-64) - ✔✔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 - ✔✔The IEEE committee responsible for Ethernet
standards.
802.11ac - ✔✔In W-Fi, the fastest physical transmission standard for sale today.
802.11ad - ✔✔802.11 physical layer standard in the 60 Ghz unlicensed band. Has a
theoretical top speed of 7 Gbps.
802.11ax - ✔✔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 - ✔✔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 - ✔✔An advanced form of 802.11 wireless LAN security.
802.11n - ✔✔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 - ✔✔Au
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