OS2 SWE Study Guide. 444 Questions and Correct Answers, With Complete Solution. Updated 2024/2025. 100% Correct.
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OS2 SWE
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OS2 SWE
OS2 SWE Study Guide. 444 Questions and Correct Answers, With Complete Solution. Updated 2024/2025. 100% Correct.
How many Tiers are in the EKMS system?
Four
TIER 0
(Central Facility(NSA)) - Composite of NSA's Fort Meade and Finksburg key facilities that provides centralized key management ser...
OS2 SWE Study Guide. 444 Questions and
Correct Answers, With Complete Solution.
Updated 2024/2025. 100% Correct.
How many Tiers are in the EKMS system?
Four
TIER 0
(Central Facility(NSA)) - Composite of NSA's Fort Meade and Finksburg key facilities that provides
centralized key management services for all forms of key.
TIER 1
(Distribution) - The layer of the EKMS which serves as the intermediate key generation and distribution
center, central offices of record (COR), privilege managers, and registration authorities for
EKMS/COMSEC accounts. Management of the system is a cooperative.
TIER 2
(Cutter Accounts) - The layer of EKMS comprised of the EKMS Accounts that manage key and other
COMSEC material. Most Tier 2 accounts are equipped with a Local Management Device (LMD) that runs
Local COMSEC Management Software (LCMS) and that interfaces with a Key Processor (KP). This suite of
equipment is referred to as a LMD/KP.
TIER 3
(SKLs or DTDs) - The lowest tier or layer of the EKMS architecture which includes but is not limited to;
the AN/CYZ-10 (Data Transfer Device (DTD), AN/PYQ-10 (Simple Key Loader (SKL) and all other means
used to fill key to End Cryptographic Units (ECU s); hard copy material holdings only; and STE keying
material only using Key Management Entities (KMEs) (i.e., Local Elements (LEs)).
Who operates/runs the Central Facility and what tier is the Central Facility?
,Who acts as the Service authority and exercises overall authority for USCG COMSEC matters & is the
program manager?
USCG C4IT Service Center Information Assurance Branch (C4ITSC-BOD-IAB)
At a minimum... how often must a CO conduct spot checks? Bonus... how many may be delegated to the
XO?
At least 4/No more than 2.
The CO, OIC or SCMSRO, as applicable is required to conduct a minimum of (1) spot check per quarter
and may delegate no more than two of the four quarterly spot checks to the Executive Officer.
What are the 3 types of EKMS incidents?
Cryptographic, Personnel, and Physical incident reports.
What is a SF-703?
Cover Sheet Top Secret, COMDTINST M5510.23A
SF700
Security Container Information
SF701
Activity Security Checklist
SF702
Security Container Checksheet
SF703
Top Secret (Coversheet)
SF704
Secret (Cover Sheet)
SF705
Confidential (Cover Sheet)
SF706
Top Secret (Label)
SF707
Secret (Label)
SF708
,Confidential (Label)
SF709
Classified (Label)
SF710
Unclassified (Label)
How often shall Emergency Action Plan (EAP) tests be conducted?
The frequency of the EAP tests shall be at the discretion of the Commanding Officer, but no less than
once per year.
Can Secret material be shipped via USPS registered mail within and between the 50 United States and its
territories?
Yes
What is the default combinations for safes?
50-25-50, when taken out of service, built-in combination locks are then reset to the standard
combination 50-25-50; combination padlocks are reset to the standard combination 10-20-30
What type of incident has occurred when any uninvestigated or unevaluated, investigated or evaluated
occurrence that has the potential to jeopardize the security of COMSEC material or the secure
transmission of classified or sensitive government information?
COMSEC Incident
How deep must the water be to jettison crypto overboard?
1000 fathoms or 6000 feet
What are the types of secured spaces?
-An exclusion area is the most secure type of restricted area.
-A limited area is the second most secure type of restricted area.
-A controlled area is the least secure type of restricted area. It may also serve as a buffer zone for
exclusion and limited areas.
How many AL codes are there in EKMS?
Five;
ALC 1, 2, 4, 6, & 7
AL Code 1
, COMSEC material is continuously accountable to the COR by accounting (serial/register) number from
production to destruction.
AL Code 2
COMSEC material is continuously accountable to the COR by quantity from production to destruction.
AL Code 4
After initial receipt to the COR, COMSEC material is locally accountable by quantity and
handled/safeguarded based on its classification.
AL Code 6
COMSEC material that is electronically generated and continuously accountable to the COR from
production to destruction. AL codes assigned to electronically generated key
AL Code 7
COMSEC material that is electronically generated and locally accountable to the generating facility. AL
codes assigned to electronically generated key
What must be recorded when entering EKMS material into a Watch to Watch inventory?
-ALC
-Short Title
-Edition
-Quantity
Who must be notified when you drill a safe?
CSO, District Security Manager
How long destruction reports should be maintained for Secret publications that were once held in the
library?
4yrs
What COMSEC material is continuously accountable to Central Office of Record (COR) by accounting
number from production to destruction?
ALC1
How often must you change the combos on a safe?
Annually
How many days after appointment must you go to EKMS School?
90 days for Manager & 180 days for alternate
What are four acceptable destruction methods?
Shredding, Burning, Jettisoning, & Smashing
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