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N10-009 Zertifizierungsfragen, CompTIA N10-009 PrüfungFragen

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CompTIA N10-009 Prüfungsplan:

Thema
Einzelheiten

Thema 1

OSI reference model concepts, Comparison of networking appliances, applications, and functions

Thema 2

Networking Concepts: For network administrators and IT support professionals, this domain covers

Thema 3

Network Operations: For IT operations staff and network operations center (NOC) technicians, this part of the exam covers the purpose of organizational processes and procedures and use of network monitoring technologies.

Thema 4

Cloud concepts and connectivity options, and Common networking ports.

Thema 5

Selection and configuration of wireless devices.

Thema 6

Network Implementation: For network technicians and junior network engineers, this section covers Characteristics of routing technologies, Configuration of switching technologies and features, and

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CompTIA Network+ Certification Exam N10-009 Prüfungsfragen mit Lösungen (Q174-Q179):

174. Frage
A network administrator is connecting two Layer 2 switches in a network. These switches must transfer data in multiple networks. Which of the following would fulfill this requirement?

A. 802.1Q tagging
B. Jumbo frames
C. Link aggregation
D. Native VLAN

Antwort: A

Begründung:
802.1Q tagging, also known as VLAN tagging, is used to identify VLANs on a trunk link between switches. This allows the switches to transfer data for multiple VLANs (or networks) over a single physical connection. This method ensures that traffic from different VLANs is properly separated and managed across the network.

175. Frage
Which of the following most likely requires the use of subinterfaces?

A. A router with only one available LAN port
B. A firewall performing deep packet inspection
C. A switch using Spanning Tree Protocol
D. A hub utilizing jumbo frames

Antwort: A

Begründung:
* Introduction to Subinterfaces:
* Subinterfaces are logical interfaces created on a single physical interface. They are used to enable a router to support multiple networks on a single physical interface.
* Use Case for Subinterfaces:
* Subinterfaces are commonly used in scenarios where VLANs are implemented. A router with a single physical LAN port can be configured with multiple subinterfaces, each associated with a different VLAN.
* This setup allows the router to route traffic between different VLANs.
* Example Configuration:
* Consider a router with a single physical interface GigabitEthernet0/0 and two VLANs, 10 and 20.
interface GigabitEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.10.1 255.255.255.0
!
interface GigabitEthernet0/0.20
encapsulation dot1Q 20
ip address 192.168.20.1 255.255.255.0
* The encapsulation dot1Q command specifies the VLAN ID.
* Explanation of the Options:
* A. A router with only one available LAN port: This is correct. Subinterfaces allow a single physical interface to manage multiple networks, making it essential for routers with limited physical interfaces.
* B. A firewall performing deep packet inspection: Firewalls can use subinterfaces, but it is not a requirement for deep packet inspection.
* C. A hub utilizing jumbo frames: Hubs do not use subinterfaces as they operate at Layer 1 and do not manage IP addressing.
* D. A switch using Spanning Tree Protocol: STP is a protocol for preventing loops in a network and does not require subinterfaces.
* Conclusion:
* Subinterfaces provide a practical solution for routing between multiple VLANs on a router with limited physical interfaces. They allow network administrators to optimize the use of available hardware resources efficiently.

176. Frage
A network engineer needs to virtualize network services, including a router at a remote branch location. Which of the following solutions meets the requirements?

A. VPC
B. VRF
C. NFV
D. VLAN

Antwort: C

Begründung:
Network Functions Virtualization (NFV): NFV is a technology that virtualizes network services like routing, firewalls, and load balancers. It allows these services to run on virtual machines rather than requiring dedicated hardware. This is ideal for remote branch locations where deploying physical devices is costly and complex.

177. Frage
Which of the following connectors allows a singular QSFP transceiver to have several physical connections?

A. LC
B. RJ45
C. MPO
D. ST

Antwort: C

Begründung:
The MPO (Multi-fiber Push On) connector is designed to handle multiple fiber strands in a single connector, and it is commonly used with high-density transceivers like QSFP (Quad Small Form-factor Pluggable).
QSFP can support up to four channels (hence "quad"), and MPO connectors can interface multiple fibers (e.g.,
8, 12, 24), making them ideal for 40Gbps or 100Gbps deployments.
RJ45 (A) is used for Ethernet over copper.
ST (B) and LC (C) are single-fiber connectors - they don't support the multi-fiber needs of QSFP setups.
# Therefore, MPO is the correct connector type for this use case.
Reference:CompTIA Network+ N10-009 Official Study Guide - Objective 3.1: "Compare and contrast different types of connectors and transceivers."

178. Frage
A customer calls the help desk to report issues connection to the internet. The customer can reach a local database server. A technician goes to the site and examines the configuration:
Which of the following is causing the user's issue?

A. Poor upstream routing
B. Incorrect DNS
C. Unreachable gateway
D. Failed root bridge

Antwort: C

Begründung:
The customer can access local resources (a database server), which means local networking is working.
However, the inability to reach the internet suggests an issue with the default gateway. If the default gateway is unreachable, packets will not be routed outside the local network.
Breakdown of Options:
A: Incorrect DNS - DNS issues would cause problems resolving domain names, but the user should still be able to access external resources via IP addresses.
B: Unreachable gateway - # Correct answer. If the default gateway is incorrect or unreachable, the device cannot route traffic to the internet.
C: Failed root bridge - STP (Spanning Tree Protocol) failures cause switching issues, but the user can still access local devices, meaning STP is not the problem.
D: Poor upstream routing - Would affect the entire network, not just one user.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 2.3: Explain network routing concepts.

179. Frage
......

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