Acronyms

Question 1

AS

Answer 1

Autonomous System

Question 2

BLE

Answer 2

Bluetooth Low Energy

Question 3

HT

Answer 3

High Throughput

Question 4

DHCP

Answer 4

Dynamic Host Configuration Protocol

• assigns IP addresses to each device on a network
• no more than 1 per broadcast domain (unless they use DHCP Relay)
• use ipconfig / ifconfig
• DHCP IP pool is called DHCP scope

Question 5

AAA

Answer 5

Authentication, Authorization, and Accounting

• provided by RADIUS (ports 1812 - 1813) and TACAS (port 49)

Question 6

DSL

Answer 6

Digital Subscriber Line

• 2 modes: symmetric (upload = download speeds) and asymmetric (download > upload speeds)
• DSL filter is used to clear phone line of DSL noise
• almost always uses PPoE

Question 7

VPN

Answer 7

Virtual Private Network

• creates a secure tunnel so a remote machine or network can be part of a local network
• VPN connection protocol:
  1. PPTP (Point-to-Point Tunneling Protocol)
  2. L2TP (Layer 2 Tunneling Protocol)
  3. SSL (Secure Sockets Layer)

Question 8

MTBF

Answer 8

Mean Time Between Failure

MTBF = MTTR + MTTF
MTTR = Mean Time to Repair
MTTF = Mean Time to Failure

Question 9

PPP

Answer 9

Point-to-Point Protocol

• layer 2 communications protocol between 2 routers directly
• can provide connection, authentication, transmission, encryption, and compression
• used by ISPs for customer dial-up access to the Internet

Question 10

AUP

Answer 10

Acceptable Use Policy

Question 11

ATP

Answer 11

Asynchronous Transfer Mode

Question 12

FIPS

Answer 12

Federal Information Processing Standard

Question 13

FDDI

Answer 13

Fiber Distributed Data Interface

Question 14

ICANN

Answer 14

Internet Corporation for Assigned Names and Numbers

Question 15

EMI

Answer 15

Electromagnetic Interference

Question 16

DR

Answer 16

Designated Router

Question 17

AP

Answer 17

Access Point

Question 18

FM

Answer 18

Frequency Modulation

Question 19

IDF

Answer 19

Intermediate Distribution Frame

Question 20

MIMO

Answer 20

Multiple Input, Multiple Output

Question 21

CSMA/CD

Answer 21

Carrier-Sense Multiple Access / Collision Detection

• used in ethernet to avoid collisions

Question 22

CSMA/CA

Answer 22

Carrier-Sense Multiple Access / Collision Avoidance

• used for wireless (802.11) because there is no way to detect collisions in the world of wireless

Question 23

HA

Answer 23

High Availability

• supported w/fault tolerance and redundancy
• use; raid array, redundant power supply, UPS, clustering, and failover systems and link aggregation

Question 24

ICS

Answer 24

Industrial Control Systems

parts: machine sensors, ICS server/controller, actuator, interface
- designed for systems in close proximity that can be accessed quickly

Question 25

SCADA

Answer 25

Supervisory Control & Data Aggregation

• a type of ICS designed for long-distance
• more autonomous to handle things before a human gets there
• have Remote Terminal Units (RTUs) [normal ICS do not have these]

Question 26

SIEM

Answer 26

Security Information and Event Management

• aggregation (collects and stores data)
• correlation (alerts if something goes wrong and triggers for thresholds)

ex: Splunk, ELK, ArcSight

Question 27

COPE

Answer 27

Corporate Owned Personally Enabled

• mobile deployment option
• corporate issued device that uses corp-specified apps but allows for personally installed apps and usage

Question 28

EAP

Answer 28

Extensible Authentication Protocol

• allows for authentication flexibility (envelope) by negotiating what each system can do
• used almost exclusively for wireless networks
• similar to Kerberos