Nokia Network Routing Specialist I (NRS I)
Certification Exam Prep – Questions & Answers
| Grade A | 100% Correct (Verified Answers)
Networking Fundamentals
1. What is the primary purpose of the Address Resolution
Protocol (ARP)?
A) To map an IP address to a MAC address
B) To map a MAC address to an IP address
C) To map a hostname to an IP address
D) To map an IP address to a hostname
2. Which protocol is used to automatically assign IP addresses
to hosts on a network?
A) ARP
B) DNS
C) DHCP
D) TCP
3. 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
,4. The TCP protocol is characterized as:
A) Connectionless and unreliable
B) Connection-oriented and reliable
C) Connectionless and reliable
D) Connection-oriented and unreliable
5. A VLAN is used primarily to:
A) Increase network bandwidth
B) Connect different buildings
C) Create logical broadcast domains within a physical network
D) Block all broadcast traffic
6. What is the main function of a default gateway?
A) To forward traffic within the same subnet
B) To forward traffic destined for remote networks
C) To assign IP addresses
D) To resolve domain names
7. Which layer of the OSI model is responsible for logical
addressing and routing?
A) Data Link Layer
B) Network Layer
C) Transport Layer
D) Physical Layer
,8. What does TTL in an IP header prevent?
A) Packet fragmentation
B) Packet encryption
C) Packet loss
D) Infinite routing loops
9. ICMP is primarily used for:
A) Encrypting data packets
B) Routing packets between networks
C) Diagnostic and error reporting
D) Transporting data reliably
10. What is the purpose of the "checksum" field in IP, TCP, and
UDP headers?
A) To encrypt the packet payload
B) To detect corruption in the header
C) To prioritize traffic
D) To identify the application
IP Routing Fundamentals
11. What is the primary function of a router?
A) To connect devices within the same LAN
B) To forward packets between different IP networks
C) To filter MAC addresses
D) To amplify electrical signals
, 12. A routing table contains:
A) A list of all MAC addresses on the network
B) A list of all active TCP sessions
C) Paths to reach specific network destinations
D) A list of all VLANs
13. What is a static route?
A) A route that is learned from a routing protocol
B) A route that is automatically discovered
C) A manually configured route
D) A default route
14. The command show router route-table is used to:
A) Display the ARP table
B) Display the MAC address table
C) Display the IP routing table
D) Display the interface status
15. What is the administrative distance (AD)?
A) The cost of a route
B) The physical distance to a destination
C) The trustworthiness of a routing information source
D) The number of hops to a destination
16. Which has a lower (more preferred) administrative
distance?
A) OSPF
Certification Exam Prep – Questions & Answers
| Grade A | 100% Correct (Verified Answers)
Networking Fundamentals
1. What is the primary purpose of the Address Resolution
Protocol (ARP)?
A) To map an IP address to a MAC address
B) To map a MAC address to an IP address
C) To map a hostname to an IP address
D) To map an IP address to a hostname
2. Which protocol is used to automatically assign IP addresses
to hosts on a network?
A) ARP
B) DNS
C) DHCP
D) TCP
3. 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
,4. The TCP protocol is characterized as:
A) Connectionless and unreliable
B) Connection-oriented and reliable
C) Connectionless and reliable
D) Connection-oriented and unreliable
5. A VLAN is used primarily to:
A) Increase network bandwidth
B) Connect different buildings
C) Create logical broadcast domains within a physical network
D) Block all broadcast traffic
6. What is the main function of a default gateway?
A) To forward traffic within the same subnet
B) To forward traffic destined for remote networks
C) To assign IP addresses
D) To resolve domain names
7. Which layer of the OSI model is responsible for logical
addressing and routing?
A) Data Link Layer
B) Network Layer
C) Transport Layer
D) Physical Layer
,8. What does TTL in an IP header prevent?
A) Packet fragmentation
B) Packet encryption
C) Packet loss
D) Infinite routing loops
9. ICMP is primarily used for:
A) Encrypting data packets
B) Routing packets between networks
C) Diagnostic and error reporting
D) Transporting data reliably
10. What is the purpose of the "checksum" field in IP, TCP, and
UDP headers?
A) To encrypt the packet payload
B) To detect corruption in the header
C) To prioritize traffic
D) To identify the application
IP Routing Fundamentals
11. What is the primary function of a router?
A) To connect devices within the same LAN
B) To forward packets between different IP networks
C) To filter MAC addresses
D) To amplify electrical signals
, 12. A routing table contains:
A) A list of all MAC addresses on the network
B) A list of all active TCP sessions
C) Paths to reach specific network destinations
D) A list of all VLANs
13. What is a static route?
A) A route that is learned from a routing protocol
B) A route that is automatically discovered
C) A manually configured route
D) A default route
14. The command show router route-table is used to:
A) Display the ARP table
B) Display the MAC address table
C) Display the IP routing table
D) Display the interface status
15. What is the administrative distance (AD)?
A) The cost of a route
B) The physical distance to a destination
C) The trustworthiness of a routing information source
D) The number of hops to a destination
16. Which has a lower (more preferred) administrative
distance?
A) OSPF
