Objective 1.023% of exam

Networking Concepts

N10-009 Practice Questions

Networking Concepts is 23% of N10-009, covering OSI models, IPv4/IPv6 addressing, switching, routing, wireless, and cloud. Expect drag-and-drop, multiple-choice, and performance-based questions where you subnet, select ports, or identify a topology. You must apply concepts, not just recall definitions.

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What this objective tests

N10-009 Networking Concepts — Key Topics

Subnet IPv4/IPv6, read a routing table, and match OSI layers to devices. Get VLANs and 802.1Q trunking right: verify with show vlan brief and show interfaces trunk on Cisco switches.

Identify OSI layer for protocols like TCP, UDP, ARP, and ICMP.
Calculate subnets and host ranges from CIDR notation such as /26.
Differentiate 802.11 standards, frequencies, and wireless security types.
Compare routing protocols including OSPF, BGP, and static routes.

Common exam traps

Where candidates lose marks on Networking Concepts

⚠Confusing Layer 2 switches with Layer 3 routers when selecting devices for a topology.
⚠Forgetting that IPv6 uses 128-bit addresses and does not support broadcast, only multicast.
⚠Mixing up TCP and UDP port numbers for common services like DNS, DHCP, and SNMP.

N10-009 Networking Concepts — Practice Questions

30 questions from this objective · 23% of your N10-009 exam

Question 2easymultiple choice

Review the full subnetting walkthrough →

A device is configured with IP address 192.168.1.130 and subnet mask 255.255.255.192. What is the network address of this device?

Question 3easymultiple choice

Review the full subnetting walkthrough →

A network engineer is designing a subnet that can support at least 10 hosts. Which subnet mask would provide exactly 14 usable host addresses?

Question 4easymultiple choice

Networking Concepts

N10-009 Networking Concepts — Key Topics

Where candidates lose marks on Networking Concepts

N10-009 Networking Concepts — Practice Questions

A device is configured with IP address 192.168.1.130 and subnet mask 255.255.255.192. What is the network address of this device?

A network engineer is designing a subnet that can support at least 10 hosts. Which subnet mask would provide exactly 14 usable host addresses?

A network engineer needs to transfer a large database file from one server to another across a WAN link. The transfer must be reliable and guarantee that the data arrives without errors. Which transport layer protocol should the engineer use?

A network engineer needs to assign IP addresses to a new subnet that will support exactly 25 devices. Which subnet mask would provide the minimum number of usable host addresses while still accommodating the requirement?

A company needs a subnet that will support exactly 50 devices. Which subnet mask provides the minimum number of usable host addresses while still accommodating the requirement?

A technician needs to connect two different networks and forward traffic based on IP addresses. Which of the following devices operates at Layer 3 of the OSI model and should be used?

A network administrator needs to create a subnet that supports exactly 50 hosts. Which subnet mask provides the smallest subnet that meets this requirement?

A network engineer configures OSPF on two routers with a primary link (1 Gbps) and a backup link (100 Mbps). The engineer expects traffic to always use the primary link unless it fails, but the router is sending traffic over the backup link. What is the most likely cause?

A network engineer is troubleshooting connectivity issues between two data center switches that are configured to support jumbo frames with an MTU of 9000. The link is a 10 Gigabit Ethernet fiber connection. Large file transfers fail, but small transfers succeed. What is the most likely cause?

Which of the following devices operates at Layer 3 of the OSI model and makes forwarding decisions based on destination IP addresses?

A network engineer is configuring IPv6 on a router interface. Which of the following is a valid global unicast IPv6 address?

A network engineer is explaining to a manager why wireless networks often have lower throughput than wired Ethernet. Which of the following best describes the primary reason for this difference?

At which layer of the OSI model does logical addressing (e.g., IP addresses) and routing occur?

Which of the following is a characteristic of a connectionless protocol at the transport layer?

Drag and drop the steps to configure a static route on a network router into the correct order.

Drag and drop the steps to recover a lost router password on a Cisco device into the correct order.

Match each network device to its primary function.

A network administrator is troubleshooting a connectivity issue and suspects the problem is related to the physical cabling. At which layer of the OSI model should the administrator begin their investigation?

A network technician is explaining the concept of encapsulation to a junior technician. At which OSI layer does a packet get encapsulated with a source and destination IP address?

A network engineer is designing a new IPv6 addressing scheme. The company has been assigned a /48 prefix and needs to support up to 250 subnets. Which subnet size should be used to minimize waste while meeting the requirement?

A network technician is explaining the difference between a hub and a switch to a junior technician. Which statement correctly describes a key difference between these devices?

A network engineer needs to connect two network segments that use different physical media: one segment uses copper Ethernet and the other uses fiber optic. The device must forward frames based on MAC addresses and must not perform any routing. Which device should the engineer choose?

A network engineer is troubleshooting a communication issue between two hosts. The engineer determines that the data is being segmented at the source and reassembled at the destination, but the segments are arriving out of order. Which OSI layer is responsible for sequencing the segments?

A network technician is assigned a subnet mask of 255.255.255.248. How many usable host addresses are available in this subnet?

A network technician is explaining the OSI model to a junior technician. The technician mentions that the Transport layer is responsible for end-to-end communication and data segmentation. Which protocol operates at the Transport layer?

Which of the following protocols is used to automatically assign IP addresses to devices on a network?

Which of the following is a characteristic of UDP when compared to TCP?

A network device receives a frame and forwards it based on the destination MAC address. The device does not modify the frame and only floods unknown unicast frames. At which layer of the OSI model does this device operate?

All N10-009 Objectives

Networking Concepts

N10-009 Networking Concepts — Key Topics

Where candidates lose marks on Networking Concepts

N10-009 Networking Concepts — Practice Questions

A device is configured with IP address 192.168.1.130 and subnet mask 255.255.255.192. What is the network address of this device?

A network engineer is designing a subnet that can support at least 10 hosts. Which subnet mask would provide exactly 14 usable host addresses?

A network engineer needs to transfer a large database file from one server to another across a WAN link. The transfer must be reliable and guarantee that the data arrives without errors. Which transport layer protocol should the engineer use?

A network engineer needs to assign IP addresses to a new subnet that will support exactly 25 devices. Which subnet mask would provide the minimum number of usable host addresses while still accommodating the requirement?

A company needs a subnet that will support exactly 50 devices. Which subnet mask provides the minimum number of usable host addresses while still accommodating the requirement?

A technician needs to connect two different networks and forward traffic based on IP addresses. Which of the following devices operates at Layer 3 of the OSI model and should be used?

A network administrator needs to create a subnet that supports exactly 50 hosts. Which subnet mask provides the smallest subnet that meets this requirement?

A network engineer configures OSPF on two routers with a primary link (1 Gbps) and a backup link (100 Mbps). The engineer expects traffic to always use the primary link unless it fails, but the router is sending traffic over the backup link. What is the most likely cause?

A network engineer is troubleshooting connectivity issues between two data center switches that are configured to support jumbo frames with an MTU of 9000. The link is a 10 Gigabit Ethernet fiber connection. Large file transfers fail, but small transfers succeed. What is the most likely cause?

Which of the following devices operates at Layer 3 of the OSI model and makes forwarding decisions based on destination IP addresses?

A network engineer is configuring IPv6 on a router interface. Which of the following is a valid global unicast IPv6 address?

A network engineer is explaining to a manager why wireless networks often have lower throughput than wired Ethernet. Which of the following best describes the primary reason for this difference?

At which layer of the OSI model does logical addressing (e.g., IP addresses) and routing occur?

Which of the following is a characteristic of a connectionless protocol at the transport layer?

Drag and drop the steps to configure a static route on a network router into the correct order.

Drag and drop the steps to recover a lost router password on a Cisco device into the correct order.

Match each network device to its primary function.

A network administrator is troubleshooting a connectivity issue and suspects the problem is related to the physical cabling. At which layer of the OSI model should the administrator begin their investigation?

A network technician is explaining the concept of encapsulation to a junior technician. At which OSI layer does a packet get encapsulated with a source and destination IP address?

A network engineer is designing a new IPv6 addressing scheme. The company has been assigned a /48 prefix and needs to support up to 250 subnets. Which subnet size should be used to minimize waste while meeting the requirement?

A network technician is explaining the difference between a hub and a switch to a junior technician. Which statement correctly describes a key difference between these devices?

A network engineer needs to connect two network segments that use different physical media: one segment uses copper Ethernet and the other uses fiber optic. The device must forward frames based on MAC addresses and must not perform any routing. Which device should the engineer choose?

A network engineer is troubleshooting a communication issue between two hosts. The engineer determines that the data is being segmented at the source and reassembled at the destination, but the segments are arriving out of order. Which OSI layer is responsible for sequencing the segments?

A network technician is assigned a subnet mask of 255.255.255.248. How many usable host addresses are available in this subnet?

A network technician is explaining the OSI model to a junior technician. The technician mentions that the Transport layer is responsible for end-to-end communication and data segmentation. Which protocol operates at the Transport layer?

Which of the following protocols is used to automatically assign IP addresses to devices on a network?

Which of the following is a characteristic of UDP when compared to TCP?

A network device receives a frame and forwards it based on the destination MAC address. The device does not modify the frame and only floods unknown unicast frames. At which layer of the OSI model does this device operate?

All N10-009 Objectives