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IPv4 Review IPv4 Header Version: 4 IHL (Internet Header Length): length of the header in 32-bit increments. Value 5 = 5 lines x 32 bits TOS (Type of Service): used to prioritize the IP packet (QoS) Total Length: 65535 bytes Identification, Flags & Fragment Offset. Control of fragmentation Flags: Bit 0 is reserved. If bit 1 is set to 0, fragmentation is allowed. If set to 1, not allowed. If bit 2 is set to 0, then it is the last fragment. If 1, more fragments follow. Time to Live: lifetime of the packet. Each router reduces the value by 1 Protocol: e.g. TCP, UDP, ICMP, etc. Header Checksum: checksum. Rarely used. Source / Destination: destination and source address IPv4 & IPv6 Header Differences ...

Reading the Titanic Dataset [codesyntax lang=“php”]train <- read.csv(“C:/[PFAD]/train.csv”, header = TRUE)[/codesyntax] Information about the data structure [codesyntax lang=“php”]str (train)[/codesyntax] Result: ’train.frame’: 891 obs. of 11 variables: $ survived: int 0 1 1 1 0 0 0 0 1 1 … $ pclass : int 3 1 3 1 3 3 1 3 3 2 … $ name : Factor w/ 891 levels “Abbing, Mr. Anthony”,..: 109 191 358 277 16 559 520 629 417 581 … $ sex : Factor w/ 2 levels “female”,“male”: 2 1 1 1 2 2 2 2 1 1 … $ age : num 22 38 26 35 35 NA 54 2 27 14 … $ sibsp : int 1 1 0 1 0 0 0 3 0 1 … $ parch : int 0 0 0 0 0 0 0 1 2 0 … $ ticket : Factor w/ 681 levels “110152”,“110413”,..: 524 597 670 50 473 276 86 396 345 133 … $ fare : num 7.25 71.28 7.92 53.1 8.05 … $ cabin : Factor w/ 148 levels “”,“A10”,“A14”,..: 1 83 1 57 1 1 131 1 1 1 … $ embarked: Factor w/ 4 levels “”,“C”,“Q”,“S”: 4 2 4 4 4 3 4 4 4 2 … ...

Comment I am a comment Output • print(“Hello World”) • cat(“Hello”, “World”) Information about R Commands # To find information about a specific command, e.g. ‘which’ • apropos(“which”) • help(which) • ?which • RSiteSearch(“which”) Command History & Exit # Show previously entered commands history() # Exit RStudio q() Working Directory # Show my R working directory getwd() # Change Working Directory # Set a new working directory setwd(‘PFAD’) Saving R Commands/Script Save R commands or R script locally save (myTable, file=“C:/Users/axxKreis/Desktop/myTable.RData”) Loading R Commands/Script # Load persisted results load (file=“C:/Users/axxKreis/Desktop/myTable.RData”) ...

Office – Desktop – Small Helpers Atom - Text editor Notepad++ - Text editor IZArc - Archive utility Agent Ransack - Local search OpenOffice - Office suite Dia - Diagram editor KDiff3 - Compares two files or directories WinMerge - Compares two files or directories TailMe - Monitors file growth BareTail - Monitors file growth Cygwin - Unix API emulator InfoRapid - Full-text search tools LingoPad - Multilingual dictionary Xenu’sLink Sleuth - Detects dead links JR Screen Ruler - Desktop ruler FreeMind - Mind mapping tool DM2 - Window control (transparency, bring windows to front, etc.) PDFCreator - Application for creating PDF files Renamer-It! - To rename files Win32 Disk Imager - To copy an image to an SD card GoogleCalendarSync - To synchronize Google Calendar with Outlook QTranslate - Translation program Calibre - E-book Manager (reader) DeskPins - Pin window to foreground Audio – Video ...