practice questions notes

Question 1

_____ matches the hostname to the IP address

Answer 1

The forward lookup zone

Question 2

_____ matches the IP address to the hostname

Answer 2

A reverse lookup zone

Question 3

Dynamic DNS (DDNS)

Answer 3

enables clients or the DHCP server to update records in the zone database automatically (whenever an IP address lease is created or renewed).

Question 4

The CNAME record

Answer 4

provides alternate names (or aliases) to hosts that already have a host record. Using a single A record with multiple CNAME records means that when the IP address changes, only the A record needs to be modified

Question 5

_____ are assigned by the DHCP server using the device’s MAC address.

Answer 5

Reservations

Question 6

Whenever the device with the specified MAC address connects to the network, the DHCP server assigns the reserved static IP configuration to that device. (true/false)

Answer 6

true

Question 7

Reservations are static IP addresses that are not dynamically assigned by the DHCP server. (true/false)

Answer 7

true

Question 8

The IP range

Answer 8

defines the range of IP addresses that the DHCP server can assign

Question 9

The default gateway

Answer 9

defines where data packets that leave the network should go

Question 10

_____ are IP addresses that the DHCP server will not assign.

Answer 10

Exclusions

Question 11

_____ monitors all network traffic, looking for anything out of the ordinary

Answer 11

The intrusion prevention system (IPS)

Question 12

When malicious or suspicious packets are detected, the IPS blocks the packets and notifies the network security team so further action can be taken. (true/false)

Answer 12

true

Question 13

_____ is responsible for monitoring and controlling all incoming and outgoing traffic.

Answer 13

The firewall

Question 14

The firewall controls the flow of data based on rules that have been configured by the network administrator. Most firewalls are configured to detect the type of traffic, the source and destination addresses, and ports. (true/false)

Answer 14

true

Question 15

Many UTM appliances use _____ software to detect and prevent malware from infecting the network

Answer 15

anti-malware

Question 16

_____ maps internal private IP addresses to a public IP address.

Answer 16

Network Address Translation (NAT

Question 17

Unified Threat Management (UTM) appliance…

Answer 17

combines multiple functions into one single device, including the firewall, IPS, content filtering, VPN support, and much more.

Question 18

_____ are two majors concerns for IoT users

Answer 18

Hackers and privacy

Question 19

Because IoT devices are closely connected, all a hacker has to do is exploit one vulnerability to manipulate all the data, rendering it unusable. Additionally, companies that make and distribute consumer IoT devices could use those devices to obtain and sell users’ personal data. (true/false)

Answer 19

true

Question 20

_____ are two radio protocols that many IoT devices work with because they are designed for low-data rate, low-power applications. These protocols link all IoT devices to form a mesh network.

Answer 20

Zigbee and Z-Wave

Question 21

Zensys

Answer 21

is the developer of the Z-Wave wireless mesh networking technology.

Question 22

_____ is a fictitious alien species that inhabits the Milky Way.

Answer 22

Zerg

Question 23

Zbot

Answer 23

is a Trojan virus that targets Windows computers to extract sensitive financial information.

Question 24

_____ learns from your habits and schedule, allows you to control the climate in your home remotely, shows you energy consumption in real time, and adjusts itself depending on ambient conditions.

Answer 24

A smart thermostat

Question 25

smart switch

Answer 25

allows you to control hardwired lights, ceiling fans, fireplaces, small appliances, and garbage disposals.

Question 26

_____ can change colors, track motion, stream audio over Bluetooth, and double as a connected camera, but it's only smart when turned on.

Answer 26

A smart bulb

Question 27

A smart plug

Answer 27

is an easy solution for making appliances such as lamps, coffee makers, and toasters smart.

Question 28

_____ uses an RF transmitter and may include such features as motion detection, scheduled recording, remote viewing, and automatic cloud storage.

Answer 28

A smart security camera

Question 29

A smart door lock

Answer 29

uses a wireless protocol and a cryptographic key to execute the authorization process. A smart door can also monitor access and send alerts related to a device's status.

Question 30

_____ uses voice recognition software and activates through a Wake Word or Hot Word.

Answer 30

A smart speaker/digital assistant

Question 31

IoT systems that work together to make communication between two endpoints possible?

Answer 31

-Data storage -Gateway system

Question 32

Two of the four IoT systems that work together for endpoint communication include the gateway system and data storage. (true/false)

Answer 32

true

Question 33

_____ connects an IoT device to the cloud

Answer 33

gateway system

Question 34

_____ is the system in the cloud that stores, processes, and analyzes the data

Answer 34

data storage

Question 35

The access gateway is the layer of the IoT architecture that compresses the gathered data to an optimal size for analysis. (true/false)

Answer 35

true

Question 36

_____ is another layer of the IoT architecture that includes cloud processes, such as device information discovery and access control.

Answer 36

Middleware

Question 37

Wi-Fi is one of the IoT's communication protocols. (true/false)

Answer 37

true

Question 38

distributed control system (DCS)

Answer 38

is a customized, all-in-one package that contains the needed PLCs, SCADA controller, and HMI.

Question 39

_____ is a specialized controller that can be programmed to perform specific tasks.

Answer 39

programmable logic controller (plc)

Question 40

Supervisory control and data acquisition (SCADA)

Answer 40

controllers are used to monitor and control PLC systems. SCADA controllers adjust the system based on the data acquired from sensors.

Question 41

_____ can be either a touchscreen control panel or software running on a typical computer system. _____ allows the operator to make configuration changes in the system.

Answer 41

The human-machine interface (HMI)

Question 42

Embedded devices are sealed systems, which means that they are typically unknown environments. (true/false)

Answer 42

true explanation: This means that the security administrator will not always know which hardware is in the device.