ESTUDYR
COMPTIA NETWORK+ CERTIFICATION (EXAM N10-007)
MOST TESTED QUESTIONS AND ANSWERS GRADED A+
WITH RATIONALES
1. What does OSI stand for?
A. Open Standards Interface
B. Operational Systems Integration
C. Open Systems Interconnection (Correct)
D. Open System Internet
Rationale: OSI is the Open Systems Interconnection model — a seven-layer conceptual
framework for network communication.
2. What does TCP/IP stand for?
A. Transmission Control Protocol/Internet Privacy
B. Transmission Control Protocol/Internet Protocol (Correct)
C. Transfer Control Packet/Internet Protocol
D. Transport Control Process/Internet Protocol
Rationale: TCP/IP is the core suite of protocols that underpin the Internet: Transmission Control
Protocol and Internet Protocol.
3. What is the correct top → bottom order of the seven OSI layers?
A. Physical, Data Link, Network, Transport, Session, Presentation, Application
B. Application, Network, Transport, Data Link, Physical, Presentation, Session
C. Application, Presentation, Session, Transport, Network, Data Link, Physical (Correct)
D. Physical, Session, Transport, Network, Data Link, Presentation, Application
Rationale: The OSI order from Layer 7 down to 1 is Application, Presentation, Session,
Transport, Network, Data Link, Physical.
4. A helpful bottom-up mnemonic for OSI layers is:
A. All People Seem To Need Data Processing
B. Please Do Not Throw Sausage Pizza Away
,ESTUDYR
C. Please Do Not Throw Sausage Pizza Away (Correct)
D. People Prefer Sandwiches To Nibble Daily
Rationale: "Please Do Not Throw Sausage Pizza Away" maps to Physical, Data Link, Network,
Transport, Session, Presentation, Application (bottom→top).
5. What is UTP?
A. Unprocessed Transmission Protocol
B. Unshielded Twisted Pair cable (Correct)
C. Universal Transfer Port
D. Unified Transport Packet
Rationale: UTP is Unshielded Twisted Pair cable, typically containing four twisted wire pairs
used for Ethernet networking.
6. Which OSI layer defines cabling, physical media and basic electrical/optical/radio
functions?
A. Layer 2 — Data Link
B. Layer 3 — Network
C. Layer 1 — Physical (Correct)
D. Layer 4 — Transport
Rationale: Layer 1 (Physical) handles the physical transmission of raw bits over a medium
(cables, fiber, radio).
7. True or false: The NIC is considered part of the OSI Physical layer.
A. True
B. False (Correct)
C. Only for wireless NICs
D. Only for fiber NICs
Rationale: NIC functionality spans Data Link (LLC/MAC) primarily; cabling and media are
Physical Layer. NIC often implements Layer 2 functions.
, ESTUDYR
8. A MAC address is best described as:
A. A 32-bit logical address assigned by DHCP
B. A variable-length application identifier
C. A 48-bit hardware (physical) address burned into the NIC (Correct)
D. A human-readable hostname
Rationale: MAC addresses are 48-bit physical addresses (often shown in 12 hex digits) assigned
by manufacturers.
9. Which of the following is another correct name for a MAC-48 address?
A. IP-48
B. OUI-64
C. EUI-48 (Correct)
D. MAC-24
Rationale: MAC-48 is the original term; the IEEE now calls this EUI-48 (Extended Unique
Identifier).
10. How many hex characters are required to show a 48-bit MAC address?
A. 6 hex characters
B. 8 hex characters
C. 12 hex characters (Correct)
D. 24 hex characters
Rationale: Each hex digit = 4 bits → 48 bits / 4 = 12 hex characters (e.g., 00-40-05-60-7D-49).
11. What does the first 6 hex digits (first 24 bits) of a MAC address represent?
A. Device serial number
B. Organizationally Unique Identifier (OUI) — the manufacturer (Correct)
C. Network prefix assigned by admin
D. The device’s IP address
Rationale: The OUI identifies the NIC manufacturer; the last 24 bits are the device’s unique ID.
COMPTIA NETWORK+ CERTIFICATION (EXAM N10-007)
MOST TESTED QUESTIONS AND ANSWERS GRADED A+
WITH RATIONALES
1. What does OSI stand for?
A. Open Standards Interface
B. Operational Systems Integration
C. Open Systems Interconnection (Correct)
D. Open System Internet
Rationale: OSI is the Open Systems Interconnection model — a seven-layer conceptual
framework for network communication.
2. What does TCP/IP stand for?
A. Transmission Control Protocol/Internet Privacy
B. Transmission Control Protocol/Internet Protocol (Correct)
C. Transfer Control Packet/Internet Protocol
D. Transport Control Process/Internet Protocol
Rationale: TCP/IP is the core suite of protocols that underpin the Internet: Transmission Control
Protocol and Internet Protocol.
3. What is the correct top → bottom order of the seven OSI layers?
A. Physical, Data Link, Network, Transport, Session, Presentation, Application
B. Application, Network, Transport, Data Link, Physical, Presentation, Session
C. Application, Presentation, Session, Transport, Network, Data Link, Physical (Correct)
D. Physical, Session, Transport, Network, Data Link, Presentation, Application
Rationale: The OSI order from Layer 7 down to 1 is Application, Presentation, Session,
Transport, Network, Data Link, Physical.
4. A helpful bottom-up mnemonic for OSI layers is:
A. All People Seem To Need Data Processing
B. Please Do Not Throw Sausage Pizza Away
,ESTUDYR
C. Please Do Not Throw Sausage Pizza Away (Correct)
D. People Prefer Sandwiches To Nibble Daily
Rationale: "Please Do Not Throw Sausage Pizza Away" maps to Physical, Data Link, Network,
Transport, Session, Presentation, Application (bottom→top).
5. What is UTP?
A. Unprocessed Transmission Protocol
B. Unshielded Twisted Pair cable (Correct)
C. Universal Transfer Port
D. Unified Transport Packet
Rationale: UTP is Unshielded Twisted Pair cable, typically containing four twisted wire pairs
used for Ethernet networking.
6. Which OSI layer defines cabling, physical media and basic electrical/optical/radio
functions?
A. Layer 2 — Data Link
B. Layer 3 — Network
C. Layer 1 — Physical (Correct)
D. Layer 4 — Transport
Rationale: Layer 1 (Physical) handles the physical transmission of raw bits over a medium
(cables, fiber, radio).
7. True or false: The NIC is considered part of the OSI Physical layer.
A. True
B. False (Correct)
C. Only for wireless NICs
D. Only for fiber NICs
Rationale: NIC functionality spans Data Link (LLC/MAC) primarily; cabling and media are
Physical Layer. NIC often implements Layer 2 functions.
, ESTUDYR
8. A MAC address is best described as:
A. A 32-bit logical address assigned by DHCP
B. A variable-length application identifier
C. A 48-bit hardware (physical) address burned into the NIC (Correct)
D. A human-readable hostname
Rationale: MAC addresses are 48-bit physical addresses (often shown in 12 hex digits) assigned
by manufacturers.
9. Which of the following is another correct name for a MAC-48 address?
A. IP-48
B. OUI-64
C. EUI-48 (Correct)
D. MAC-24
Rationale: MAC-48 is the original term; the IEEE now calls this EUI-48 (Extended Unique
Identifier).
10. How many hex characters are required to show a 48-bit MAC address?
A. 6 hex characters
B. 8 hex characters
C. 12 hex characters (Correct)
D. 24 hex characters
Rationale: Each hex digit = 4 bits → 48 bits / 4 = 12 hex characters (e.g., 00-40-05-60-7D-49).
11. What does the first 6 hex digits (first 24 bits) of a MAC address represent?
A. Device serial number
B. Organizationally Unique Identifier (OUI) — the manufacturer (Correct)
C. Network prefix assigned by admin
D. The device’s IP address
Rationale: The OUI identifies the NIC manufacturer; the last 24 bits are the device’s unique ID.
