Deep Dive: E2D10
The correct answer is C: Three digipeater hops are requested with one remaining. What the packet path WIDE3-1 designate is that three digipeater hops are requested with one remaining. WIDE3-1 means 3 hops requested, 1 already used, so 2 remaining. For amateur radio operators, this is important for APRS operation. Understanding this helps when operating APRS.
Why Other Answers Are Wrong
Option A: Incorrect. Three stations allowed on frequency, one transmitting isn't what WIDE3-1 means - it's about digipeater hops, not stations on frequency. Stations on frequency isn't the meaning. Option B: Incorrect. Three subcarriers permitted, subcarrier one being used isn't what WIDE3-1 means - it's about digipeater hops, not subcarriers. Subcarriers isn't the meaning. Option D: Incorrect. Three internet gateway stations may receive one transmission isn't what WIDE3-1 means - it's about digipeater hops, not internet gateways. Internet gateways isn't the meaning.
Exam Tip
WIDE3-1 = three digipeater hops requested with one remaining. Think 'W'IDE'3'-'1' = '3' hops requested, '1' used, '2' remaining. WIDE3-1 means 3 hops requested, 1 already used, so 2 remaining. Not stations on frequency, not subcarriers, not internet gateways - just digipeater hops.
Memory Aid
WIDE3-1 = three digipeater hops requested with one remaining. Think 'W'IDE'3'-'1' = '3' hops, '1' used. WIDE3-1 means 3 hops requested, 1 already used, so 2 remaining. Important for APRS operation.
Real-World Example
APRS packet path WIDE3-1: It designates that three digipeater hops are requested, with one hop already used, so two hops remaining. The packet has been digipeated once, and can be digipeated two more times. This is what WIDE3-1 means - three hops requested, one remaining (after one used).
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E2D
Reference: 2024-2028 Question Pool · E2 - Operating Procedures
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E2D topic.