@endtoendpaper: Notes

Create and Wipe Storage Device in Linux for Security+ Exam

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Look at disks and devices

sudo fdisk -l
fdisk for creating, deleting, resizing, changing, moving partitions on a hard drive
f stands for fixed disk or format disk
/dev/sda are device paths or available DISKS
dev stands for device paths
sd is short for SCSI mass Storage Device
Under each will be partitions

Quantitative Risk Assessments

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Single Loss Expectancy (SLE)
- How much loss is experienced during one negative incident?
- Multiply Asset Value (AV) by the exposure factore (EF)
- $24,000 * 12.5% = $3,000

Annualized Rate of Occurrence (ARO)
- Expected number of yearly occurrences

Annualized Loss Expectancy (ALE)
- Total yearly cost of b

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Fiber Connector Types

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1. ST connectors: These connectors are the most common type of commercial fiber optic connector. These connectors utilize an exposed plastic tube housing the optical fiber.

2. SC-Connector: SC is short for Subscriber Connect is one of the most frequently used conn

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Kanban Board Hierarchy

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Epic
|
Story - Task - Bug
\ | /
Sub-Task

😀
Epic - Goal or large user story
Story - Typically development work and focused on the user's perspective ("User Stories")
Task - Often maintenance and operations work
Bug - Defect in
Su

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Rails Concerns

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# shared model methods( callbacks, validates, scopes, associations) - instance and class

module Item  
extend ActiveSupport::Concern
  
  # instance associations, scopes, validations, callbacks, methods, private methods  
  included do    
    belongs_to :user    
    has_many :collaborations, as:

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Ruby blocks

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Like JavaScript anonymous undefined functions

With the yield statement

def test
   puts "You are in the method"
   yield
   puts "You are again back to the method"
   yield
end
test {puts "You are in the block"}


def test
   yield 5
   puts "You are in the method test"
   yield 100
end
test {|i| puts

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OSI Layers to TCP/IP (Transmission Control Protocol) Layers

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7 - Application -> Application

6 - Presentation -> Application

5 - Session -> Application

4 - Transport -> Transport

3 - Network -> Network

2 - Data Link -> Network Interface

1 - Physical -> Network Interface

Mnemonic: All People Seem To Need Data Processing (OSI)

TCP/IP: Application - Transport - Network I

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Straight Through vs Crossover Cables

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Straight through is the most common type and is used to connect computers to hubs or switches. They are most likely what you will find when you go to your local computer store and buy a patch cable.

Crossover Ethernet cable is more commonly used to connect a computer to a computer and may be a littl

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