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CompTIA Network+ Certification Exam Sample Questions (Q128-Q133):
NEW QUESTION # 128
Network administrators are using the Telnet protocol to administer network devices that are on the 192.168.1.0
/24 subnet. Which of the following tools should the administrator use to best identify the devices?
- A. telnet
- B. dig
- C. nmap
- D. tracert
Answer: C
Explanation:
nmap (Network Mapper) is the best tool in this scenario. It can scan the 192.168.1.0/24 subnet to discover live hosts, open ports (like Telnet on port 23), and device types. It's ideal for mapping and auditing the network.
A: dig is a DNS lookup tool; not useful for identifying hosts on a subnet.
C: tracert shows the path packets take to a destination, not for host discovery.
D: telnet is the protocol being used, not a tool for scanning or identifying devices.
# Reference:
CompTIA Network+ N10-009 Official Objectives: 5.1 - Given a scenario, use the appropriate network troubleshooting tools.
NEW QUESTION # 129
A VoIP phone is plugged in to a port but cannot receive calls. Which of the following needs to be done on the port to address the issue?
- A. Trunk all VLANs on the port.
- B. Tag the traffic to voice VLAN.
- C. Disable VLANs.
- D. Configure the native VLAN.
Answer: B
Explanation:
* Understanding VoIP and VLANs:
* VoIP (Voice over IP) phones often use VLANs (Virtual Local Area Networks) to separate voice traffic from data traffic for improved performance and security.
* Tagging Traffic to Voice VLAN:
* Voice VLAN Configuration: The port on the switch needs to be configured to tag traffic for the specific voice VLAN. This ensures that voice packets are prioritized and handled correctly.
* VLAN Tagging: VLAN tagging allows the switch to identify and separate voice traffic from other types of traffic on the network, reducing latency and jitter for VoIP communications.
* Comparison with Other Options:
* Trunk all VLANs on the port: Trunking all VLANs is typically used for links between switches, not for individual device ports.
* Configure the native VLAN: The native VLAN is for untagged traffic and does not address the need for separating and prioritizing voice traffic.
* Disable VLANs: Disabling VLANs would mix voice and data traffic, leading to potential performance issues and lack of traffic separation.
* Implementation:
* Configure the switch port connected to the VoIP phone to tag the traffic for the designated voice VLAN, ensuring proper network segmentation and quality of service.
NEW QUESTION # 130
A company is hosting a secure that requires all connections to the server to be encrypted. A junior administrator needs to harded the web server. The following ports on the web server. The following ports on the web server are open:
Which of the following ports should be disabled?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
For a web server that requires all connections to be encrypted, port 80 (HTTP) should be disabled. Port 80 is used for unencrypted web traffic, whereas port 443 is used for HTTPS, which provides encrypted communication.
Port 80 (HTTP): This port is used for unsecured web traffic. Disabling this port ensures that all web traffic must use HTTPS, which encrypts the data in transit.
Port 443 (HTTPS): This port is used for secure web traffic via SSL/TLS encryption. Keeping this port open ensures that secure connections can be made to the web server.
Other Ports:
Port 22: Used for SSH, providing secure remote access and file transfers.
Port 587: Used for secure email submission (SMTP) with encryption.
Network References:
CompTIA Network+ N10-007 Official Certification Guide: Discusses the roles and security implications of various ports and protocols.
Cisco Networking Academy: Provides training on secure web server configuration and port management.
Network+ Certification All-in-One Exam Guide: Covers port security and best practices for securing web servers.
NEW QUESTION # 131
Which of the following is created to illustrate the effectiveness of wireless networking coverage in a building?
- A. Logical diagram
- B. Service-level agreement
- C. Layer 3 network diagram
- D. Heat map
Answer: D
Explanation:
Definition of Heat Maps:
A heat map is a graphical representation of data where individual values are represented by colors. In the context of wireless networking, a heat map shows the wireless signal strength in different areas of a building.
Purpose of a Heat Map:
Heat maps are used to illustrate the effectiveness of wireless networking coverage, identify dead zones, and optimize the placement of access points (APs) to ensure adequate coverage and performance.
Comparison with Other Options:
Logical Diagram: Represents the logical connections and relationships within the network.
Layer 3 Network Diagram: Focuses on the routing and IP addressing within the network.
Service-Level Agreement (SLA): A contract that specifies the expected service levels between a service provider and a customer.
Creation and Use:
Heat maps are created using specialized software or tools that measure wireless signal strength throughout the building. The data collected is then used to generate a visual map, guiding network administrators in optimizing wireless coverage.
Reference:
CompTIA Network+ certification materials and wireless network planning guides.
NEW QUESTION # 132
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. NFV
- B. VLAN
- C. VPC
- D. VRF
Answer: A
Explanation:
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.
VRF (B): Virtual Routing and Forwarding is used for segmenting routing tables but does not virtualize services.
VLAN (C): Virtual Local Area Networks help segregate broadcast domains but are unrelated to virtualizing network functions.
VPC (D): Virtual Private Cloud is used for cloud computing but does not pertain to virtualizing network services.
Reference: CompTIA Network+ Official Study Guide, Domain 2.1 (Virtualization and Cloud Concepts).
NEW QUESTION # 133
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