Two providers are not two internet rows | Rapid course Security architecture and engineering

Open, free learning for anyone who wants to protect people and technology. No account is required to read this text or its worked answers.

Lesson map

Lesson 11. Map, example, EX057.

flowchart TD
  A["Prose: two internet providers"] --> B["Print: one internet row, 2 services"]
  B --> C{"Split the row into two providers?"}
  C -->|No| D["Keep internet 2 service(s)"]
  C -->|Yes| E["The script has one internet key"]

The row counts services that list internet. It does not name providers.

Logical drawing

prose
    two internet providers
script key
    internet
services that list it
    online banking
    branch PCs
print
    internet       2 service(s)
        |
        +-- one row
        +-- providers are not named
        +-- lab_deps.py is not edited

Learning outcomes

After this chapter, you should be able to:

Keep the prose mention of two providers.
Keep one print row, internet with 2 services.
Name neither provider.

11.1 The row counts a key, not a contract.

The supplier paragraph says Saltmarsh uses two internet providers. The laboratory key is a single word, internet. Online banking and branch PCs list that key, so the print says internet supports 2 services. A classmate splits the row into two named providers and assigns one service to each. The file names neither provider, and it does not say which service uses which contract. Leah leaves the single row. She does not edit lab_deps.py.

11.2 Worked example

Lesson table; scroll horizontally to read all columns →

Idea	Evidence	Decision
"The prose says two providers."	The supplier paragraph	May stay
"The print has one internet row of 2."	The published output	May stay
"Print two provider names."	No names in the file	Refuse
"Give each provider one service."	The script does not say that	Refuse

Synthetic case. No carrier is invented. The row stays one line.

Errors and limits

One row does not prove the two providers are equal, and it does not prove one of them is spare. The file does not say.

Apply

EX057 — How many internet rows? The prose names two internet providers. The print shows one row, internet with 2 services. A classmate prints two named providers. What do you keep, and what do you not invent?
Show marking criteria
Rubric: 3 = two providers stay in the prose; the print stays one row of 2 services; name neither provider; do not edit the script;; 2 = the print stays one row;; 1 = one of those;; 0 = none.