TEXAS NETWORK INFRASTRUCTURE
TECHNICIAN PRACTICE EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which OSI layer is responsible for logical addressing?
A. Physical
B. Data Link
C. Network
D. Transport
Logical IP addressing and routing decisions occur at the
Network layer.
2. Which device forwards traffic based on MAC addresses?
A. Router
B. Switch
C. Firewall
D. Modem
Switches operate at Layer 2 and use MAC address tables.
,3. What cable type is most resistant to electromagnetic
interference?
A. UTP
B. STP
C. Fiber optic
D. Coaxial
Fiber optic uses light instead of electrical signals, eliminating
EMI.
4. Which protocol resolves IP addresses to MAC addresses?
A. DNS
B. DHCP
C. ARP
D. ICMP
ARP maps known IP addresses to physical MAC addresses.
5. What is the default port for HTTPS?
A. 21
B. 80
C. 443
D. 3389
,HTTPS traffic is encrypted and uses TCP port 443.
6. Which topology uses a single central device?
A. Bus
B. Star
C. Ring
D. Mesh
Star topology relies on a central hub or switch.
7. What tool tests cable continuity?
A. Multimeter
B. Cable tester
C. OTDR
D. Loopback plug
Cable testers verify continuity, pinout, and shorts.
8. Which IP address class supports the most hosts?
A. Class A
B. Class B
C. Class C
D. Class A
, Class A networks allow over 16 million hosts.
9. What does PoE provide?
A. Data only
B. Cooling
C. Power over Ethernet
D. Encryption
PoE delivers electrical power and data over Ethernet cables.
10. Which layer handles encryption?
A. Transport
B. Presentation
C. Session
D. Network
The Presentation layer handles encryption and data
formatting.
11. Which connector is used with single-mode fiber?
A. RJ-45
B. BNC
C. LC
D. F-type
TECHNICIAN PRACTICE EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which OSI layer is responsible for logical addressing?
A. Physical
B. Data Link
C. Network
D. Transport
Logical IP addressing and routing decisions occur at the
Network layer.
2. Which device forwards traffic based on MAC addresses?
A. Router
B. Switch
C. Firewall
D. Modem
Switches operate at Layer 2 and use MAC address tables.
,3. What cable type is most resistant to electromagnetic
interference?
A. UTP
B. STP
C. Fiber optic
D. Coaxial
Fiber optic uses light instead of electrical signals, eliminating
EMI.
4. Which protocol resolves IP addresses to MAC addresses?
A. DNS
B. DHCP
C. ARP
D. ICMP
ARP maps known IP addresses to physical MAC addresses.
5. What is the default port for HTTPS?
A. 21
B. 80
C. 443
D. 3389
,HTTPS traffic is encrypted and uses TCP port 443.
6. Which topology uses a single central device?
A. Bus
B. Star
C. Ring
D. Mesh
Star topology relies on a central hub or switch.
7. What tool tests cable continuity?
A. Multimeter
B. Cable tester
C. OTDR
D. Loopback plug
Cable testers verify continuity, pinout, and shorts.
8. Which IP address class supports the most hosts?
A. Class A
B. Class B
C. Class C
D. Class A
, Class A networks allow over 16 million hosts.
9. What does PoE provide?
A. Data only
B. Cooling
C. Power over Ethernet
D. Encryption
PoE delivers electrical power and data over Ethernet cables.
10. Which layer handles encryption?
A. Transport
B. Presentation
C. Session
D. Network
The Presentation layer handles encryption and data
formatting.
11. Which connector is used with single-mode fiber?
A. RJ-45
B. BNC
C. LC
D. F-type
