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CompTIA Network+ Certification Exam Sample Questions (Q141-Q146):

NEW QUESTION # 141
A network administrator is reviewing a production web server and observes the following output from the netstat command:
Which of the following actions should the network administrator take to harden the security of the web server?

A. Set up a screened subnet.
B. Enforce access control lists.
C. Disable the unused ports.
D. Perform content filtering.

Answer: C

Explanation:
The netstat output shows that multiple ports are open, including Telnet (23), FTP (20), and TFTP (69), which are potential security risks. Disabling unused ports minimizes the attack surface, reducing security vulnerabilities.
Breakdown of Options:
A: Disable the unused ports - Correct answer. Unused ports should be closed to prevent unauthorized access.
B: Enforce access control lists - ACLs help control access but do not disable unnecessary services.
C: Perform content filtering - Content filtering controls web traffic, not port security.
D: Set up a screened subnet - A DMZ (screened subnet) improves security but does not address open ports.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 3.4: Given a scenario, implement network security measures.
CIS Benchmark for Linux & Windows Server Hardening

NEW QUESTION # 142
While troubleshooting a VoIP handset connection, a technician's laptop is able to successfully connect to network resources using the same port. The technician needs to identify the port on the switch. Which of the following should the technician use to determine the switch and port?

A. IKE
B. VLAN
C. netstat
D. LLDP

Answer: D

Explanation:
Link Layer Discovery Protocol (LLDP) is a network protocol used for discovering devices and their capabilities on a local area network, primarily at the data link layer (Layer 2). It helps in identifying the connected switch and the specific port to which a device is connected. When troubleshooting a VoIP handset connection, the technician can use LLDP to determine the exact switch and port where the handset is connected. This protocol is widely used in network management to facilitate the discovery of network topology and simplify troubleshooting.
Other options such as IKE (Internet Key Exchange), VLAN (Virtual LAN), and netstat (network statistics) are not suitable for identifying the switch and port information. IKE is used in setting up secure IPsec connections, VLAN is used for segmenting networks, and netstat provides information about active connections and listening ports on a host but not for discovering switch port details.
Reference: CompTIA Network+ Certification Exam Objectives - Network Troubleshooting and Tools section.

NEW QUESTION # 143
Which of the following is the next step to take after successfully testing a root cause theory?

A. Implement the solution to the problem.
B. Present the theory for approval.
C. Duplicate the problem in a lab.
D. Determine resolution steps.

Answer: A

Explanation:
* Troubleshooting Methodology:
* Confirming the Root Cause:After testing and confirming the theory, the next logical step is to address the issue by implementing a solution.
* Implementation of the Solution:
* Resolve the Issue:Implement the identified solution to rectify the problem. This step involves making necessary changes to the network configuration, replacing faulty hardware, or applying software patches.
* Documentation:Document the solution and the steps taken to resolve the issue to provide a reference for future troubleshooting.
* Comparison with Other Steps:
* Determine Resolution Steps:This is part of the implementation process where specific actions are outlined, but the actual next step after testing is to implement those steps.
* Duplicate the Problem in a Lab:This step is typically done earlier in the troubleshooting process
* to understand the problem, not after confirming the root cause.
* Present the Theory for Approval:In some scenarios, presenting the theory might be necessary for major changes, but generally, once the root cause is confirmed, the solution should be implemented.
* Final Verification:
* After implementing the solution, it is important to verify that the issue is resolved and that normal operations are restored. This may involve monitoring the network and testing to ensure no further issues arise.
References:
* CompTIA Network+ study materials on troubleshooting methodologies and best practices.

NEW QUESTION # 144
Which of the following devices can operate in multiple layers of the OSI model?

A. Switch
B. Modem
C. Transceiver
D. Hub

Answer: A

Explanation:
Understanding Switches:
Layer 2 (Data Link Layer): Traditional switches operate primarily at Layer 2, where they use MAC addresses to forward frames within a local network.
Layer 3 (Network Layer): Layer 3 switches, also known as multilayer switches, can perform routing functions using IP addresses to forward packets between different networks.
Capabilities of Multilayer Switches:
VLANs and Inter-VLAN Routing: Multilayer switches can handle VLAN (Virtual Local Area Network) configurations and perform inter-VLAN routing, enabling communication between different VLANs.
Routing Protocols: They can run routing protocols like OSPF (Open Shortest Path First) and EIGRP (Enhanced Interior Gateway Routing Protocol) to manage traffic between networks.

NEW QUESTION # 145
Users cannot connect to an internal website with an IP address 10.249.3.76. A network administrator runs a command and receives the following output:
1 3ms 2ms 3ms 192.168.25.234
2 2ms 3ms 1ms 192.168.3.100
3 4ms 5ms 2ms 10.249.3.1
4 *
5 '
6 *
7 ?
Which of the following command-line tools is the network administrator using?

A. tracert
B. tcpdump
C. netstat
D. nmap

Answer: A

Explanation:
Understanding Tracert:
tracert (Traceroute in Windows) is a command-line tool used to trace the path that packets take from the source to the destination. It records the route (the specific gateways at each hop) and measures transit delays of packets across an IP network.
Output Analysis:
The output shows a series of IP addresses with corresponding round-trip times (RTTs) in milliseconds.
The asterisks (*) indicate that no response was received from those hops, which is typical for routers or firewalls that block ICMP packets used by tracert.

NEW QUESTION # 146
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