Minnesota Network Infrastructure
Engineer Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which layer of the OSI model is responsible for logical addressing and
routing?
A. Data Link
B. Network
C. Transport
D. Session
Answer: B
The Network layer (Layer 3) is responsible for logical addressing such
as IP addresses and routing packets between different networks.
2. What protocol is primarily used for dynamic IP address assignment?
A. DNS
B. DHCP
, C. FTP
D. ARP
Answer: B
DHCP automatically assigns IP addresses and network configuration
parameters to devices on a network.
3. Which routing protocol is considered a link-state protocol?
A. RIP
B. EIGRP (classic mode)
C. OSPF
D. BGP
Answer: C
OSPF is a link-state routing protocol that builds a complete map of
the network topology for efficient routing.
4. What is the default subnet mask for a Class C IP address?
A. 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
D. 255.255.255.255
Answer: C
Class C networks use 255.255.255.0 as the default subnet mask,
allowing 256 addresses per network.
5. Which device operates primarily at Layer 2 of the OSI model?
A. Router
, B. Switch
C. Gateway
D. Firewall
Answer: B
A switch operates at the Data Link layer and forwards frames based
on MAC addresses.
6. What is the purpose of VLANs in a network?
A. Increase bandwidth
B. Encrypt traffic
C. Segment broadcast domains
D. Replace routers
Answer: C
VLANs logically segment networks into separate broadcast domains
for improved performance and security.
7. Which protocol resolves IP addresses to MAC addresses?
A. DNS
B. ARP
C. ICMP
D. SNMP
Answer: B
ARP maps IP addresses to physical MAC addresses within a local
network.
, 8. What does NAT primarily do?
A. Encrypt data
B. Translate IP addresses
C. Route packets
D. Assign MAC addresses
Answer: B
Network Address Translation modifies IP address information in
packet headers for routing purposes.
9. Which port does HTTPS use by default?
A. 21
B. 80
C. 443
D. 22
Answer: C
HTTPS uses port 443 for secure web communication over TLS/SSL.
10. What is the function of a default gateway?
A. Assign IP addresses
B. Connect different networks
C. Encrypt traffic
D. Filter spam
Answer: B
A default gateway routes traffic from a local network to external
networks.
Engineer Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which layer of the OSI model is responsible for logical addressing and
routing?
A. Data Link
B. Network
C. Transport
D. Session
Answer: B
The Network layer (Layer 3) is responsible for logical addressing such
as IP addresses and routing packets between different networks.
2. What protocol is primarily used for dynamic IP address assignment?
A. DNS
B. DHCP
, C. FTP
D. ARP
Answer: B
DHCP automatically assigns IP addresses and network configuration
parameters to devices on a network.
3. Which routing protocol is considered a link-state protocol?
A. RIP
B. EIGRP (classic mode)
C. OSPF
D. BGP
Answer: C
OSPF is a link-state routing protocol that builds a complete map of
the network topology for efficient routing.
4. What is the default subnet mask for a Class C IP address?
A. 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
D. 255.255.255.255
Answer: C
Class C networks use 255.255.255.0 as the default subnet mask,
allowing 256 addresses per network.
5. Which device operates primarily at Layer 2 of the OSI model?
A. Router
, B. Switch
C. Gateway
D. Firewall
Answer: B
A switch operates at the Data Link layer and forwards frames based
on MAC addresses.
6. What is the purpose of VLANs in a network?
A. Increase bandwidth
B. Encrypt traffic
C. Segment broadcast domains
D. Replace routers
Answer: C
VLANs logically segment networks into separate broadcast domains
for improved performance and security.
7. Which protocol resolves IP addresses to MAC addresses?
A. DNS
B. ARP
C. ICMP
D. SNMP
Answer: B
ARP maps IP addresses to physical MAC addresses within a local
network.
, 8. What does NAT primarily do?
A. Encrypt data
B. Translate IP addresses
C. Route packets
D. Assign MAC addresses
Answer: B
Network Address Translation modifies IP address information in
packet headers for routing purposes.
9. Which port does HTTPS use by default?
A. 21
B. 80
C. 443
D. 22
Answer: C
HTTPS uses port 443 for secure web communication over TLS/SSL.
10. What is the function of a default gateway?
A. Assign IP addresses
B. Connect different networks
C. Encrypt traffic
D. Filter spam
Answer: B
A default gateway routes traffic from a local network to external
networks.
