Free CompTIA N10-009 Exam Dumps Questions

- (Topic 3)
A network administrator is investigating a network event that is causing all communication to stop. The network administrator is unable to use SSH to connect to the switch but is able to gain access using the serial console port. While monitoring port statistics, the
administrator sees the following:

Which of the following is MOST likely causing the network outage?

Correct Answer:B

- (Topic 3)
After router and device configurations are applied, internet access is not possible. Which of the following is the most likely cause?

Correct Answer:C

The default gateway is the IP address of the router that connects a network to the internet or another network. The default gateway is usually configured on the devices that need to access the internet or other networks, such as PCs, servers, or routers. If the router was configured with an incorrect default gateway, it would not be able to forward packets to the correct destination, and internet access would not be possible.
The other options are not the most likely causes of the issue. The Ethernet interface is the physical port that connects a device to a network using a cable. If the Ethernet interface was configured with an incorrect IP address, it would cause a problem with the local network connectivity, not the internet access. The loopback address is a special IP address that refers to the device itself, usually used for testing or troubleshooting purposes. If the router was configured with an incorrect loopback address, it would not affect the internet access, as the loopback address is not used for routing packets to other networks. The serial interface is another type of physical port that connects a device to a network using a serial cable, often used for WAN connections. If the serial interface was configured with the incorrect subnet mask, it would cause a problem with the WAN connectivity, not the internet access, as the subnet mask is used to determine the network and host portions of an IP address.
ReferencesWhat is a Default Gateway? | HowStuffWorksWhat is an Ethernet Interface? - Definition from TechopediaWhat is a Loopback Address? - Definition from TechopediaWhat is a Serial Interface? - Definition from Techopedia

- (Topic 3)
A network administrator is preparing answers for an annual risk assessment that is required for compliance purposes. Which of the following would be an example of an internal threat?

Correct Answer:A
Insider threat= insider threat is defined as the threat that an employee or a contractor will use his or her authorized access, wittingly or unwittingly, to do harm

- (Topic 3)
Which of the following routing protocols is hierarchal by nature and uses the router ID to control convergence?

Correct Answer:B
OSPF stands for Open Shortest Path First, which is a link-state routing protocol that is hierarchal by nature and uses the router ID to control convergence. OSPF divides a large network into areas, which are logical groupings of routers that share the same topology information. Each area has a unique identifier and a designated router that connects it to the backbone area (area 0). OSPF uses the router ID, which is a 32-bit number that uniquely identifies each router in the network, to establish adjacencies and exchange routing information. OSPF also uses the router ID to break ties when choosing the best path to a destination. OSPF converges faster than distance-vector routing protocols such as RIP and EIGRP, as it uses the Dijkstra algorithm to calculate the shortest path based on the link cost. BGP, on the other hand, is a path-vector routing protocol that is used to exchange routing information between autonomous systems on the Internet. BGP does not use the router ID to control convergence, but rather uses attributes such as AS path, local preference, and MED to select the best route. BGP is not hierarchal by nature, as it does not divide the network into areas, but rather uses prefixes and policies to control the routing behavior.
References
✑ 1: OSPF – N10-008 CompTIA Network+ : 2.1
✑ 2: CompTIA Network+ N10-008 Certification Study Guide, page 146-149
✑ 3: CompTIA Network+ N10-008 Exam Subnetting Quiz, question 19
✑ 4: CompTIA Network+ N10-008 Certification Practice Test, question 8

- (Topic 3)
A network technician has determined the cause of a network disruption. Which of the following is the NEXT step for the technician to perform?

Correct Answer:C

- (Topic 3)
In which of the following components do routing protocols belong in a software-defined network?

Correct Answer:B
A software-defined network (SDN) is a network architecture that decouples the control plane from the data plane and centralizes the network intelligence in a software controller. The control plane is the part of the network that makes decisions about how to route traffic, while the data plane is the part of the network that forwards traffic based on the control plane’s instructions. The control layer is the layer in an SDN that contains the controller and the routing protocols that communicate with the network devices. The control layer is responsible for managing and configuring the network devices and providing them with the necessary information to forward traffic. References: https://www.comptia.org/training/books/network-n10-008-study-guide (page 378)