Digital Pros & Cons
The advantages and risks of storing and sending information digitally
Do Now: Your school wants to get rid of all paper records and keep everything digital in the cloud. List one advantage and one risk.
Advantages: easy to search, share, and back up; no fading paper. Risks: hacking and privacy leaks, accidental deletion, and losing access if a service shuts down.
A. Advantages and Disadvantages
Advantages
Perfect copies: copying doesn’t lose quality.
Stable storage: data can be checked and backed up in many places.
Fast, easy sharing: send a file around the world in seconds.
Compression: files can be made much smaller.
Error correction: extra bits can detect and fix mistakes.
Disadvantages
Easy to delete: one click can erase years of work.
Security: hackers can steal or change data.
Theft & piracy: perfect copies are easy to steal and share.
Privacy: personal information can be collected and leaked.
Obsolete formats: old file types and devices may become unreadable.
B. Sending Information With Waves
Wi-Fi and cell phones send bits using radio waves and microwaves.
Fiber-optic cables send bits as pulses of infrared light, using total internal reflection to keep the light inside the glass. Review
Higher frequency carrier waves can usually carry more bits per second.
C. Evaluate the Question
Should a museum scan its old photographs and then throw away the originals? Give one reason for and one against.
For: digital copies don’t fade and can be shared worldwide. Against: files could be deleted or become unreadable in the future; keeping originals is a backup.
A band releases its album only as digital downloads. What is one benefit and one risk for the band?
Benefit: cheap to make and instantly available everywhere. Risk: perfect copies can be pirated and shared for free.
Why do hospitals store medical images digitally and keep backups in more than one place?
Digital images can be shared instantly with specialists and never degrade. Multiple backups protect against accidental deletion, hardware failure, or attacks.
D. Engineering Design Challenge
Design a plan for storing your class’s lab data so it is safe for 10 years. List your criteria (what must the plan do?), your constraints (cost, privacy, time), and the trade-offs you made.
Sample plan: Store files in two places (school cloud + external drive) and print a paper copy of key results. Criteria: safe from deletion, readable in 10 years, private. Constraints: low cost, follows school privacy rules. Trade-offs: more backups cost more time and money; using common file formats (PDF, CSV) makes them more likely to open in the future.
Check Your Understanding
5 quick questions — pick an answer to see if you’re right.
1. Which is an advantage of digital storage?
2. Which is a disadvantage of digital information?
3. Fiber-optic cables carry digital information using
4. Keeping backups of digital files in more than one place mainly protects against
5. Why might a 30-year-old digital file be hard to open today?