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NEW QUESTION 555
Users are reporting issues with mobile phone connectivity after a cellular repeater was recently installed. Users also note that the phones are rapidly losing battery charge. Which of the following should the technician check first to troubleshoot the issue?
A. WPS configuration.
B. Signal strength.
C. Channel frequency.
D. Power budget.
Answer: B
Explanation:
When signal strength is poor, mobile devices constantly boost their transmission power in an attempt to maintain a stable connection. This results in dropped calls/data and rapid battery drain. Since a repeater was installed, misalignment or misconfiguration could be degrading the signal strength.
NEW QUESTION 556
After a security incident, a technician reveals that company data was stolen. During the investigation, it is discovered that a host disguised itself as a switch. Which of the following best describes the attack that occurred?
A. VLAN hopping.
B. Evil twin.
C. DNS poisoning.
D. ARP spoofing.
Answer: A
Explanation:
VLAN hopping occurs when an attacker tricks a switch into believing the host is another switch by generating tagged frames or exploiting trunk negotiation (DTP). This allows the attacker to access traffic from multiple VLANs, potentially stealing sensitive data.
NEW QUESTION 557
Which of the following troubleshooting steps provides a change advisory board with the information needed to make a decision?
A. Identify the problem.
B. Develop a theory of probable cause.
C. Test the theory to determine cause.
D. Establish a plan of action.
Answer: D
Explanation:
When dealing with troubleshooting and change management, the plan of action outlines the steps, risks, and mitigation strategies. A change advisory board (CAB) uses this documented plan to decide whether to approve the change.
NEW QUESTION 558
Voice traffic is experiencing excessive jitter. A network engineer wants to improve call performance and clarity. Which of the following features should the engineer configure?
A. QoS.
B. STP.
C. Traffic shaping.
D. Port mirroring.
Answer: A
Explanation:
Quality of Service (QoS) prioritizes delay-sensitive traffic such as VoIP by assigning higher priority in queues, reducing jitter, latency, and packet loss. Implementing QoS policies ensures stable and clear voice communication.
NEW QUESTION 559
A user tries to visit a website, but instead of the intended site, the page displays vmw.cba.com. Which of the following should be done to reach the correct website?
A. Modify the CNAME record.
B. Update the PTR record.
C. Change the NTP settings.
D. Delete the TXT record.
Answer: A
Explanation:
A CNAME (Canonical Name) record maps an alias to the correct fully qualified domain name (FQDN). If a user is redirected to the wrong hostname, correcting or updating the CNAME ensures the alias points to the proper domain.
NEW QUESTION 560
Which of the following physical installation factors is the most important when a network switch is installed in a sealed enclosure?
A. Fire suppression.
B. Power budget.
C. Temperature.
D. Humidity.
Answer: C
Explanation:
Switches in sealed enclosures are at risk of overheating because airflow is restricted. The temperature factor is critical since heat buildup can damage components, shorten device lifespan, and cause outages. Proper cooling or ventilation must be ensured.
NEW QUESTION 561
A network technician needs to connect a new user to the company’s Wi-Fi network called SSID: business. When attempting to connect, two networks are listed as possible choices: SSID: business and SSID: myaccess. Which of the following attacks is occurring?
A. On-path.
B. Rogue AP.
C. Evil twin.
D. Tailgating.
Answer: C
Explanation:
An evil twin attack occurs when an attacker creates a fraudulent AP with an SSID very similar (or identical) to the legitimate one. Users may accidentally connect, allowing the attacker to capture traffic and credentials.
NEW QUESTION 562
A network administrator receives complaints of intermittent network connectivity issues. The administrator investigates and finds that the network design contains potential loop scenarios. Which of the following should the administrator do?
A. Enable spanning tree.
B. Configure port security.
C. Change switchport speed limits.
D. Enforce 802.1Q tagging.
Answer: A
Explanation:
Spanning Tree Protocol (STP) is designed to detect and prevent Layer 2 loops by blocking redundant paths. If loops are possible in the design, enabling STP ensures network stability.
NEW QUESTION 563
A network engineer connects a business to a new ISP. A simple ping test to 8.8.8.8 is successful. However, users complain of extreme slowness to any website and periods of no connectivity. Which of the following is the most likely cause?
A. Incorrect default gateway.
B. VLAN mismatch.
C. Subnet mask configuration.
D. Duplicate ISP IP address.
Answer: D
Explanation:
If the business shares or duplicates the ISP-assigned public IP address, routing instability and conflicts will occur. Pinging a public IP like 8.8.8.8 may work (since ICMP can bypass certain conflicts), but browsing websites (which requires stable sessions and return traffic) will fail intermittently.
NEW QUESTION 564
A Chief Information Officer wants a DR solution that runs only after a failure of the primary site and can be brought online quickly once recent backups are imported. Which of the following DR site solutions meets these requirements?
A. Cold
B. Warm
C. Active
D. Hot
Answer: B
Explanation:
A warm site is partially configured with necessary infrastructure and systems, but it requires recent backups to be restored before becoming fully operational. This provides a balance between cost and recovery time.
NEW QUESTION 565
A systems administrator needs to connect two laptops to a printer via Wi-Fi. The office does not have access points and cannot purchase any. Which of the following wireless network types best fulfills this requirement?
A. Mesh.
B. Infrastructure.
C. Ad hoc.
D. Point-to-point.
Answer: C
Explanation:
An ad hoc wireless network allows devices to connect directly to each other without an access point. This is suitable for small, temporary setups like two laptops and a printer.
NEW QUESTION 566
Which of the following concepts describes the idea of housing different customers in the same public cloud data center?
A. Elasticity.
B. Hybrid cloud.
C. Scalability.
D. Multitenancy.
Answer: D
Explanation:
Multitenancy is a cloud concept where multiple customers share the same physical resources (servers, storage, and networks) but remain logically separated for security and privacy.
NEW QUESTION 567
Which of the following standards enables the use of an enterprise authentication for network access control?
A. 802.1Q
B. 802.1X
C. 802.3bt
D. 802.11h
Answer: B
Explanation:
802.1X provides port-based Network Access Control (NAC), requiring authentication (often through RADIUS) before granting access. This is the standard for enterprise authentication on both wired and wireless networks.
NEW QUESTION 568
A Linux server is running a log collector that needs to be hardened. A network administrator executes netstat to find open ports on the server. Which of the following ports should be disabled?
A. 22
B. 80
C. 162
D. 514
Answer: B
Explanation:
For a log collector server, the primary needed service is Syslog, which typically uses UDP port 514. Other ports may be open for management (e.g., 22 for SSH) or SNMP traps (162) if integrated. However, port 80 (HTTP) should not be open unless required, as it increases attack surface and does not directly serve the log collection purpose. Disabling it hardens the server.
NEW QUESTION 569
A network administrator is looking for a solution to extend Layer 2 capabilities and replicate backups between sites. Which of the following is the best solution?
A. Security Service Edge.
B. Data center interconnect.
C. Infrastructure as code.
D. Zero Trust architecture.
Answer: B
Explanation:
DCIs extend Layer 2 networks across geographically dispersed data centers, enabling seamless replication of services such as SAN storage, backup synchronization, or VM migrations. This ensures workloads and data can move between sites while maintaining the same VLANs and addressing.
NEW QUESTION 570
Which of the following types of network architecture typically uses leased lines to provide dedicated, private connections between multiple satellite offices and a head office?
A. Mesh.
B. Point to point.
C. Hub and spoke.
D. Star.
Answer: C
Explanation:
In this design, the head office serves as the hub, and all satellite or branch offices (the spokes) connect directly to the hub using leased lines or VPNs. Communication between spokes typically passes through the hub, which centralizes connectivity and simplifies management.
NEW QUESTION 571
Which of the following is the best reason to create a golden configuration?
A. To provide configuration consistency.
B. To decrease the size of configuration files.
C. To increase security by encrypting configurations.
D. To set up backup configurations for each device.
Answer: A
Explanation:
A golden configuration is a baseline configuration file that contains approved, standardized settings for network devices. The purpose is to ensure configuration consistency across the environment. This prevents misconfigurations, supports compliance with organizational or regulatory standards, and accelerates recovery if a device needs reconfiguration.
NEW QUESTION 572
Developers want to create a mobile application that requires a runtime environment, developer tools, and databases. The developers will not be responsible for security patches and updates. Which of the following models meets these requirements?
A. Container as a service.
B. Infrastructure as a service.
C. Platform as a service.
D. Software as a service.
Answer: C
Explanation:
PaaS provides developers with a ready-to-use platform that includes runtime environments, developer tools, middleware, and database services. Developers can focus on writing code while the provider handles security patches, updates, and infrastructure management.
NEW QUESTION 573
Which of the following is the best networking appliance for interconnecting multiple logical networks and forwarding data packets between them while minimizing latency?
A. Firewall.
B. Router.
C. Layer 2 switch.
D. Load balancer.
Answer: B
Explanation:
The correct appliance is a router, which is specifically designed to interconnect multiple networks and forward packets based on IP addresses. Routers operate at Layer 3 (Network layer) of the OSI model and make intelligent forwarding decisions to ensure data reaches the correct destination network.
NEW QUESTION 574
A network administrator is conducting an assessment and finds network devices that do not meet standards. Which of the following configurations is considered a set of rules that devices should adhere to?
A. Production
B. Backup
C. Candidate
D. Golden
Answer: D
Explanation:
This is a reference standard or baseline that defines the approved settings and rules devices should follow. Any deviation from the golden configuration indicates drift or misconfiguration that must be remediated.
NEW QUESTION 575
Which of the following is used most often when implementing a secure VPN?
A. IPSec
B. GRE
C. BGP
D. SSH
Answer: A
Explanation:
IPsec provides confidentiality, integrity, and authentication for VPN traffic, typically using ESP (Encapsulating Security Payload). It is used in both site-to-site and remote access VPNs.
NEW QUESTION 576
A company recently experienced outages of one of its critical, customer-facing applications. The root cause was an overutilized network router, but the Chief Technology Officer is concerned that the support staff was unaware of the issue until notified by customers. Which of the following is the best way to address this issue in the future?
A. Packet capture.
B. SNMP.
C. Syslog collector.
D. SIEM.
Answer: B
Explanation:
SNMP enables monitoring of network devices (routers, switches, firewalls, servers) and provides performance data such as CPU usage, bandwidth utilization, and interface status. In this scenario, if SNMP monitoring had been in place, administrators would have received alerts that the router was overutilized before customers noticed outages.
NEW QUESTION 577
An organization is struggling to get effective coverage using the wireless network. The organization wants to implement a solution that allows for continuous connectivity anywhere in the facility. Which of the following should the network administrator suggest to ensure the best coverage?
A. Implementing additional ad hoc access points.
B. Providing more Ethernet drops for user connections.
C. Deploying a mesh network in the building.
D. Changing the current frequency of the Wi-Fi.
Answer: C
Explanation:
A mesh wireless network uses multiple interconnected access points that automatically route traffic through the best available path. This ensures seamless coverage throughout a facility, even when users move between APs. Mesh APs can extend coverage without requiring each AP to be directly wired, making them ideal for large or hard-to-wire environments.
NEW QUESTION 578
A network technician is adding a new switch to increase capacity on the network. The technician connects the two switches using a single cable. Several hosts are moved to the new switch, but none of the hosts can access the network or internet. Which of the following should the technician do to resolve the issue?
A. Configure the connecting ports as trunk ports.
B. Install STP cables between the switches.
C. Increase the PoE budget for the switches.
D. Set up link aggregation on the uplink ports.
Answer: A
Explanation:
When connecting switches, the uplink ports must be configured to carry traffic for multiple VLANs (trunking), not just a single access VLAN. Without trunking, VLAN tags may be dropped, and traffic from hosts will not reach the rest of the network or internet.
NEW QUESTION 579
A support engineer is troubleshooting a network outage that is affecting 3,000 users. The engineer has isolated the issue to the internet firewall. Packet captures confirm that the firewall is blocking the traffic. Which of the following is the next step in troubleshooting?
A. Implement the solution or escalate as necessary.
B. Create a plan of action to resolve the issue and identify potential effects.
C. Establish a theory of probable cause.
D. Document findings, actions, outcomes, and lessons learned throughout the process.
Answer: B
Explanation:
The troubleshooting methodology requires following a logical sequence. In this case, the engineer has already identified the problem (firewall blocking traffic) and confirmed it with evidence (packet captures). The next appropriate step is to create a plan of action that outlines how to resolve the issue and considers potential effects.
NEW QUESTION 580
A network technician installs a new 19.7ft (6m), Cat 6, UTP cable for the connection between a server and a switch. Communication to the server is degraded, and the NIC statistics show dropped packets and CRC errors. Which of the following cables would the technician most likely use instead to reduce the errors?
A. Coaxial cable.
B. 9.8ft (3m) cable.
C. Plenum cable.
D. STP cable.
Answer: D
Explanation:
The errors described – dropped packets and CRC (Cyclic Redundancy Check) errors – often indicate electromagnetic interference (EMI) on unshielded twisted pair (UTP) cabling. The correct replacement is STP (Shielded Twisted Pair), which has shielding that protects signals from external interference, ensuring better reliability in noisy environments such as data centers or near heavy electrical equipment.
NEW QUESTION 581
Which of the following best describes the amount of time between a disruptive event and the point that affected resources need to be back to fully functional status?
A. RTO
B. MTBF
C. RPO
D. MTTR
Answer: A
Explanation:
RTO defines the maximum acceptable time to restore services after a disruption, ensuring business continuity. For example, if the RTO is 4 hours, systems must be back online within that timeframe after an outage.
NEW QUESTION 582
Which of the following involves an attacker traversing from one part of a network to another part that should be inaccessible?
A. MAC flooding.
B. DNS poisoning.
C. VLAN hopping.
D. ARP spoofing.
Answer: C
Explanation:
VLAN hopping allows an attacker to send traffic into another VLAN without authorization, often by impersonating a switch and negotiating a trunk link. This lets the attacker traverse into normally inaccessible VLANs.
NEW QUESTION 583
Which of the following is most closely associated with having a leased line to a public cloud provider?
A. VPN.
B. Direct Connect.
C. Internet gateway.
D. Private cloud.
Answer: B
Explanation:
Direct Connect (or equivalent services like Azure ExpressRoute) provides a dedicated leased line from an organization’s network directly to a public cloud provider, ensuring private, reliable, and consistent connectivity without traversing the public internet.
NEW QUESTION 584
A company is migrating a data center from on premises to the cloud. Which of the following tools will help maintain consistency, reliability, and efficiency of provisioning and management?
A. IaC
B. CDN
C. SASE
D. ZTA
Answer: A
Explanation:
Infrastructure as Code (IaC) automates the provisioning and management of infrastructure through code, ensuring consistency, reliability, and efficiency during tasks such as data center migration to the cloud.
NEW QUESTION 585
A network administrator wants to update a geofencing policy to limit remote access to the corporate network based on country location. Which of the following would the administrator most likely leverage?
A. MAC filtering.
B. Administrative distance.
C. Bluetooth beacon signals.
D. IP address blocks.
Answer: D
Explanation:
Geofencing policies typically use IP geolocation to restrict or allow access based on the source country. This is enforced by defining IP address blocks associated with specific regions.
NEW QUESTION 586
Which of the following is the best outcome of documenting lessons learned after a complicated network issue is resolved?
A. Establishing action plans.
B. Decreasing troubleshooting time.
C. Identifying problematic employees.
D. Increasing the network hardware budget.
Answer: B
Explanation:
Documenting lessons learned captures the root cause, resolution steps, and preventive measures. This knowledge base shortens troubleshooting time in future incidents by providing engineers with proven solutions and guidance.
NEW QUESTION 587
A network architect is implementing a VPN solution for remote workers. The architect wants to ensure that data transmitted through the VPN is protected from eavesdropping and tampering. Which of the following solutions meet these requirements? (Choose two.)
A. SSL
B. AES
C. TKIP
D. IPSec
E. EAP
F. SSH
Answer: BD
Explanation:
– AES provides strong encryption to protect VPN data from eavesdropping.
– IPSec ensures secure VPN tunnels with both encryption and integrity protection, preventing tampering.
NEW QUESTION 588
A user cannot access an external server for a client after connecting to a VPN. Which of the following commands would a support agent most likely use to examine the issue? (Choose two.)
A. nslookup
B. tcpdump
C. arp
D. dig
E. tracert
F. route print
Answer: EF
Explanation:
– tracert helps identify the path packets take and where they might be dropped after connecting to the VPN.
– route print displays the routing table, allowing verification of how traffic is being directed when the VPN is active.
NEW QUESTION 589
……
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