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IT Infrastructure & Security - Fall 2019


(12/18) Points have been updated with Quiz #3, Hands-on Linux, the Tech Brief Marked up Refs, and final grades. They were posted to eServices this morning, should be there for you later this afternoon. Sorry to be up to the deadline getting them posted. This activity blinds me and I need to look away from y'all's papers and the screens more than at them. What I saw was pretty good, now I get to spend a few days settling my eyes...

If there are any errors that affect grades they'll be handled on a change of grade form after the break.

(12/12) Debugging your website? VCUNet aggressively caches .html, .css., .js, images and videos! Since there are large numbers of students in classes clicking on stuff at the same time, VCUNet caches these files and delivers them locally rather than getting them fresh off info300.net every time. It complicates debugging!

To see your changes in html You Must 'explicitly refresh' the page with ctrl-r or clicking the browser's refresh button. To see changes in your css and js file you need to use Ctrl-u on a pc or View Source on a Mac, then click on the links in the <head of your document and explicity refresh each of them.

This showed up in a few questons in email today and a couple students in the the evening section tonite.

Bootstrappers! LOOK at the files you've downloaded and make sure you've pasted them into vi or otherwise copied them correctly! The latest versions of Bootstrap need javascript and jquery references to be whole. Not clicking I to get into Insert mode in vi looks like it's the problem...

(12/9) Flags on the HOL Progress Pages: The best way you can show that you're using the command line and vi is to keep your sftp clients closed except when using them to copy framework components or graphics into your web project. Use the command line to navigate around your site and vi to edit your html and css files after they're in place and that will show in the logs. Avoid copying Unicode into your projects by editing on a Mac or PC and copying to the server...

Some sftp clients will aggressively try to reconnect with the server if your ISP, or VCUNet, closes the connection and that can result in lots of Flags...

(12/9) End of Term: Quiz #3 will include questions from the Storage topic and about the HOL project. Topics beyond Storage are recommended reading, especially Transaction Logging & Backup and Professional & Security Standards. These can be very helpful for interviews and careers. The other un-covered topics like number systems and data types get repeated in other courses but nobody else is going to harp on the value of transaction logs and backups for regular audtis of data integrity and occasionally recovering from a data disaster...

(12/4) HOL Part #2, Outline in place properly formatted, was scored from these snapshots taken the morning after the deadline:

Password Check after Deadline

(12/3) A few students in classes today have asked 'How do I edit my html and css?' The only good answer is 'by navigating to your web directory with the command line and editing the html and files with vi.' This whole exercise is about working on a unix server in the cloud, getting comfortable with the command line, and the vim editor. Your log entries clearly demonstrate your progress with the command line and vi.

(11/21) Quiz #3 and the last three class meetings will cover these topics:

(11/12) HOL Project: Please read the pages for the HOL Project and ask questions about them. Please log in to info300.net from any where you'll be working off-campus so we can see if the firewall's blocking your IP address. If your Mac ssh or Windows Putty blips out without giving you the login prompt, while you're sitting there google on 'what is my ipv4 address' to see what it is and send me an email with IP address and the time you tried. If I find you were rejected in the firewall's log I can open up your subnet, or we'll know the problem is in your or your employer's firewall...

(11/12) Due Dates for HOL, Refs & Tech Brief:

(11/12) The exam period will be used for Quiz #3 and makeup or retake for Quiz #1 and/or Quiz #2. If you want to retake both Quizzes #1 and #2 a one hour exam with questions from both quizzes worth 40 points will be available. The score earned on a retake will replace the earlier score whether it improves the grade or not.

Prior notes have been moved to Prior Notes...

Current Topics:

Tech Market Brief & Hands on Linux:

(11/12) Working server-side with linux command line and the vi editor. Develop an outline for a brief on an approved topic about the IT marketplace, suitable for a blog or portfolio at LinkedIn. Publish the brief as a mobile-friendly website, responsive, standards-compliant, a clear example of semantic markup that fits the outline.


(11/21) Current Storage Tech: HDD, SSD, Flash, Hyperconverged, Cloud, &c; EDP History: Cards, Tape, Drum, Disc, SSD; HDD Geometry and Management: CHS vs. LBA, Slack Space, Fragmentation, &c; RAID; Attachment: DAS, NAS, SAN, NFS, The Cloud; Transaction Logging & Backup... (Study Questions)

Data Representation

(12/3) Computers are Binary machines but they input, store, compute, and output all kinds of data. Numbers are represented more or less directly as Binary, Decimal, and Hex Integers, Float, and Decimal. Characters are represented as ASCII, EBCDIC, and UniCode. When data moves from one platform to another, there's usually some translation or conversion involved... (Study Questions)

Security & Professional Standards

(12/5) Continuing security issues; Pillars of Information Security: CIAAN; Protection; EDI; Threat vectors; Professional Standards: COBIT, ITIL, GES, SOX, PCI, HIPAA, &c... (Study Questions


4 or 5 Generations of Programming Languages; Types of Software: Malware, Security, Version Control & Divers Others...

Data Structures & Algorithms

Watch this spot...

Prior Topics:


(8/20) Syllabus, Provost's Policies, Classroom Behavior &c, No Wandering Out and Back Into Class, Quiz & Makeup Policy...


(8/20) Platforms: Hardware, Software, Dependence, Independence, Cross-Platform, Scalability; VARs, Vertical Markets, CPUs; Operating Systems: FOSS & Proprietary; 7 Modern OS Functions; Range of Hardware Platforms: Embedded through Super (Study Questions)

LAN Project:

(10/10) Memo From the Boss, Visio demo, Intro to Networking, DMZ Firewall, Rack Diagram, Office Floorplan with Network Drops, Read and Follow Directions, Prep Purchase Orders & Summaries of up-front purchases and recurring costs. Dlv #1 Due Thursday the 17th; Dlv #2 Due at the beginning of class on Tuesday Nov 5th Thursday Nov 7th.


(9/17) Definitions; Sketch Internet & Ethernet; Visualizing & Securing Network Traffic; Setup a LAMP Stack; Infrastructure & Regulation, Management; Data Centers & IX; LANs; Network Management and Security Tools; Visualizing Traffic: Internet, LAN, WiFi Analysis, RF Spectrum, Firewall & its Logs, Packet Sniffing, Port Scanning; Networks Surveyed by Name, Size, & Technology; PSTN, Ethernet, Internet, VPN, Real Private Networks; The Ground & Fried Networks... Quiz #2 TBA: Study Questions

Data Centers

(11/7) Data Center Fundamentals; Tradeoffs: Onsite vs. Data Center, Mainframe vs. Server Farms... (Study Questions)

G Saunders,
Dept of Information Systems
VCU School of Business

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