Messaging
Communications
Networks
Key Management
History
100

The letter representation for an 'Immediate' message

"O"

100

An area that cannot receive radio transmissions but is within range

Skip Zone / Silent Zone

100

Maximum length of an ethernet cable

100 Meters (285 feet)

100

Maximum time allowed for destruction

24 hours, or upon turnover

100

Name of the person - why we have Two-Person-Integrity

Johnny Walker

200

This type of message is submitted if an event is predicted to generate media interest

OPREP-3 Navy Blue

200

Layer of the atmosphere that affects HF communications

Ionosphere

200

Maximum file size for an e-mail attachment

10mb

200

What is an SF-701 Form

Activity Security Checklist. Posted at the entrance to spaces.

200

Helped design the COBOL programming language

Coined the term "Computer Bug"

Grace Hopper

300

Format Line 5

Message Precedence + Date-Time Group

Example: R 201530Z JUN 21

300

Maximum distance for Line Of Site Communications (Non-Satcom)

Approximately 25 nautical miles

300

Setting restrictions for IP services/e-mails/phones while underway

River City

300

How often are Local Element spot checks performed

Once a month

300

Ship captured by North Korea

USS Pueblo (AGER-2)

400

Precedence for a 'Priority' message

Three hours or less

400

Frequency range for SHF Communications

3 - 30 Ghz

400

Server that scans the shipboard networks

ACAS (Assured Compliance Assessment Solution)

400

When endorsing Flag Officer comments are considered adverse by the officer reported on, the officer reported on must respond by letter to who

PERS-32

400

This group of radiomen and cryptologists worked together during WWII on the roof of the Navy building in Washington DC.

On The Roof Gang

500

Message describing radiological accidents or the loss of nuclear armaments

Broken Arrow

500

Acronym for EHF-TIP

Extremely High Frequency Time Division Multiple Access Interface Processor

500

Acronym for MSU

Mandatory Security Update

500

Evaluation rankings in the comments field is?

a. Mandatory

b. Authorized

c. Preferred

Authorized

500

Created by Walt Disney artists to depict Naval communicators

Oscar the octopus

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