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質問 # 34
Which of the following attack vectors represents a large number of devices sending access requests to a website, making it unavailable to respond?
- A. DOoS
- B. Virus
- C. Botnet
- D. ARP spooling
正解：A
質問 # 35
An engineer recently decided to upgrade the firmware on a router. During the upgrade, the help desk received calls about a network outage, and a critical ticket was opened. The network manager would like to create a policy to prevent this from happening in the future. Which of the following documents should the manager create?
- A. Standard operating procedure
- B. incident response
- C. Change management
- D. System life cycle
正解：C
質問 # 36
A user is having difficulty with video conferencing and is looking for assistance. Which of the following would BEST improve performance?
- A. Load balancing
- B. Quality of service
- C. Port mirroring
- D. Packet shaping
正解：B
解説：
Quality of service (QoS) is a mechanism that prioritizes network traffic based on different criteria, such as application type, source and destination address, port number, etc., and allocates bandwidth and resources accordingly. QoS would best improve performance for video conferencing, as it would ensure that video traffic gets higher priority and lower latency than other types of traffic on the network. Packet shaping is a technique that controls the rate or volume of network traffic by delaying or dropping packets that exceed certain thresholds or violate certain policies, which may not improve performance for video conferencing if it causes packet loss or jitter. Port mirroring is a technique that copies traffic from one port to another port on a switch for monitoring or analysis purposes, which does not improve performance for video conferencing at all. Load balancing is a technique that distributes network traffic across multiple servers or devices for improved availability and scalability, which does not
質問 # 37
A wireless network was installed in a warehouse for employees to scan crates with a wireless handheld scanner. The wireless network was placed in the corner of the building near the ceiling for maximum coverage However users in the offices adjacent lo the warehouse have noticed a large amount of signal overlap from the new network Additionally warehouse employees report difficulty connecting to the wireless network from the other side of the building; however they have no issues when Ihey are near the antenna Which of the following is MOST likely the cause?
- A. The wireless signal is being refracted by the warehouse's windows
- B. An omnidirectional antenna was used instead of a unidirectional antenna
- C. The antenna's power level was set too high and is overlapping
- D. The wireless access points are using channels from the 5GHz spectrum
正解：B
解説：
Explanation
An omnidirectional antenna was used instead of a unidirectional antenna, which is most likely the cause of the wireless network issues. An omnidirectional antenna provides wireless coverage in all directions from the antenna, which can cause signal overlap with adjacent offices and interference with other wireless networks. A unidirectional antenna, on the other hand, provides wireless coverage in a specific direction from the antenna, which can reduce signal overlap and interference and increase signal range and quality. A unidirectional antenna would be more suitable for a warehouse environment where users are located on one side of the building1. References:
https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/82068-omni-vs-direct.html 1
質問 # 38
After rebooting an AP a user is no longer able to conned to me enterprise LAN A technician plugs a laptop In to the same network jack and receives the IP 169.254 0 200. Which of the following is MOST likely causing the issue?
- A. Channel overlap
- B. Improper DNS configuration
- C. Signal attenuation
- D. DHCP scope exhaustion
正解：D
解説：
Explanation
DHCP scope exhaustion occurs when the number of available IP addresses to be leased from a DHCP server have been used up. This could be caused by a large number of clients on the network, or a misconfigured DHCP scope. When this happens, clients will be assigned an IP address from the APIPA range (169.254.0.0 to
169.254.255.255). To resolve this issue, the DHCP scope needs to be expanded or adjusted to accommodate the number of clients on the network.
質問 # 39
A network technician is troubleshooting internet connectivity issues with users in a subnet. From a host, the technician runs and then attempts to navigate to a website using a web browser.
The technician receives the following output:
Afterward, the browser displays an error. Which of the following explains this issue?
- A. A routing loop is within the network.
- B. The host is configured with incorrect DNS settings
- C. A broadcast storm is occurring on the subnet
- D. The host is missing a route to the website.
正解：B
解説：
Explanation
The issue is that the host is configured with incorrect DNS settings. DNS (Domain Name System) is a service that resolves domain names to IP addresses. For example, the domain name www.comptia.org is resolved to the IP address 104.18.25.140 by a DNS server. If the host has incorrect DNS settings, such as an invalid or unreachable DNS server address, it will not be able to resolve domain names to IP addresses, and therefore it will not be able to access websites by their names. The output in the image shows that the host can ping the IP address of www.comptia.org, but it cannot ping the domain name itself, indicating a DNS problem. References: CompTIA Network+ N10-008 Certification Study Guide, page 154; The Official CompTIA Network+ Student Guide (Exam N10-008), page 6-8.
質問 # 40
A security team updated a web server to require https:// in the URL. Although the IP address did not change, users report being unable to reach the site. Which of the following should the security team do to allow users to reach the server again?
- A. Configure inbound firewall rules to allow traffic to port 443.
- B. Configure the router to include the subnet of the server.
- C. Configure the switch port with the correct VLAN.
- D. Configure the server with a default route.
正解：A
解説：
Explanation
One possible reason why users are unable to reach the site after the security team updated the web server to require https:// in the URL is that the firewall rules are blocking the traffic to port 443. Port 443 is the default port for HTTPS, which is the protocol that encrypts and secures the web communication. If the firewall rules do not allow inbound traffic to port 443, then users will not be able to access the web server using HTTPS12.
To troubleshoot this issue, the security team should configure inbound firewall rules to allow traffic to port
443. This can be done by using the firewall-cmd command on RHEL 8.2, which is a tool that manages firewalld, the default firewall service on RHEL. The command to add a rule to allow traffic to port 443 is:
firewall-cmd --permanent --add-port=443/tcp
The --permanent option makes the rule persistent across reboots, and the --add-port option specifies the port number and protocol (TCP) to allow. After adding the rule, the security team should reload the firewalld service to apply the changes:
firewall-cmd --reload
The security team can verify that the rule is active by using this command:
firewall-cmd --list-ports
The output should show 443/tcp among the ports that are allowed34.
The other options are not relevant to troubleshooting this issue. Configuring the switch port with the correct VLAN may help with network segmentation or isolation, but it will not affect the HTTPS protocol or port.
Configuring the router to include the subnet of the server may help with network routing or connectivity, but it will not enable HTTPS communication. Configuring the server with a default route may help with network access or reachability, but it will not allow HTTPS traffic.
質問 # 41
A technician is troubleshooting network connectivity from a wall jack. Readings from a multimeter indicate extremely low ohmic values instead of the rated impedance from the switchport. Which of the following is the MOST likely cause of this issue?
- A. Faulty LED
- B. Incorrect transceivers
- C. Upgraded OS version on switch
- D. Short circuit
正解：D
解説：
Explanation
A short circuit is a condition where two conductors in a circuit are connected unintentionally, creating a low resistance path for the current. This causes the voltage to drop and the current to increase, which can damage the circuit or cause a fire. A multimeter can measure the resistance or impedance of a circuit, and if it shows extremely low values, it indicates a short circuit.
質問 # 42
Which of the following cable types would MOST likely be used to provide high-speed network connectivity between nearby buildings?
- A. Cat 5
- B. Coaxial
- C. UTP
- D. Fiber
- E. Twinaxial
正解：D
質問 # 43
A Fortune 500 firm is deciding On the kind or data center equipment to install given its five-year budget Outlook. The Chief Information comparing equipment based on the life expectancy Of different models.
Which Of the
following concepts BEST represents this metric?
- A. MTRR
- B. RPO
- C. MTBF
- D. RTO
正解：C
質問 # 44
A user reports that a new VoIP phone works properly, but the computer that is connected to the phone cannot access any network resources. Which of the following MOST likely needs to be configured correctly to provide network connectivity to the computer?
- A. MDIX settings
- B. Port duplex settings
- C. ARP settings
- D. Port aggregation
- E. VLAN tags
正解：B
質問 # 45
A network technician receives a report from the server team that a server's network connection is not working correctly. The server team confirms the server is operating correctly except for the network connection. The technician checks the switchport connected to the server and reviews the following data;
Which of the following should the network technician perform to correct the issue?
- A. Reset the switchport configuration.
- B. Install a crossover cable between the server and the switch
- C. Disable MDIX on the switchport and reboot the server.
- D. Use NetFlow data from the switch to isolate the issue.
- E. Replace the Cat 5 patch cable with a Cat 6 cable
正解：E
解説：
Explanation
"Bad cables, incorrect pinouts, or bent pins: Faulty cables (with electrical characteristics preventing successful transmission) or faulty connectors (which do not properly make connections) can prevent successful data transmission at Layer 1. A bad cable could simply be an incorrect category of cable being used for a specific purpose. For example, using a Cat 5 cable (instead of a Cat 6 or higher cable) to connect two 1000BASE-TX devices would result in data corruption. Bent pins in a connector or incorrect pinouts could also cause data to become corrupted."
質問 # 46
During the troubleshooting of an E1 line, the point-to-point link on the core router was accidentally unplugged and left unconnected for several hours. However, the network management team was not notified. Which of the following could have been configured to allow early detection and possible resolution of the issue?
- A. MIB
- B. OID
- C. Baselines
- D. Traps
正解：D
解説：
Traps are unsolicited messages sent by network devices to a network management system (NMS) when an event or a change in status occurs. Traps can help notify the network management team of any issues or problems on the network, such as a link failure or a device reboot. Traps can also trigger actions or alerts on the NMS, such as sending an email or logging the event. MIB stands for Management Information Base and is a database of information that can be accessed and managed by an NMS using SNMP (Simple Network Management Protocol). OID stands for Object Identifier and is a unique name that identifies a specific variable in the MIB. Baselines are measurements of normal network performance and behavior that can be used for comparison and analysis.
質問 # 47
A corporate client is experiencing global system outages. The IT team has identified multiple potential underlying causes throughout the enterprise Each team member has been assigned an area to trouble shoot.
Which of the following approaches is being used?
- A. Top-to-bottom
- B. Bottom-to-top
- C. Determine if anything changed
- D. Divide-and-conquer
正解：D
質問 # 48
A technician is equipped with a tablet, a smartphone, and a laptop to troubleshoot a switch with the help of support over the phone. However, the technician is having issues interconnecting all these tools in troubleshooting the switch. Which Of the following should the technician use to gain connectivity?
- A. MAN
- B. PAN
- C. LAN
- D. WAN
正解：B
解説：
Explanation
A PAN stands for Personal Area Network and it is a type of network that connects devices within a small range, such as a few meters. A PAN can use wireless technologies such as Bluetooth or Wi-Fi to interconnect devices such as tablets, smartphones, and laptops. A technician can use a PAN to gain connectivity among these tools and troubleshoot the switch.
References: Network+ Study Guide Objective 1.2: Explain devices, applications, protocols and services at their appropriate OSI layers.
質問 # 49
A cafeteria is lacing lawsuits related to criminal internet access that was made over its guest network. The marketing team, however, insists on keeping the cafeteria phone number as the wireless passphrase. Which of the following actions would Improve wireless security while accommodating the marketing team and accepting the terms of use?
- A. Configuring guest network isolation
- B. Using geofencing to limit the area covered by the WLAN
- C. Deploying a captive portal tor user authentication
- D. Setting WLAN security to use EAP-TLS
正解：C
解説：
Explanation
A captive portal is a web page that is presented to a user before they are allowed to access a network. It is used to authenticate users and to ensure that all users have accepted the terms of use for the network. By deploying a captive portal, the cafeteria can require users to enter their phone number as the passphrase, while still providing an additional layer of security. Reference: CompTIA Network+ Study Guide, 8th Edition, page 182.
質問 # 50
A company is deploying a SAN at headquarters and a branch office 1, 000ml (1,609km) away that we access small amounts of dat a. Which of the following types of connections would be MOST cost effective to implement?
- A. FCoE
- B. ISCSI
- C. FC
- D. Ethernet
正解：A
質問 # 51
An engineer was asked to update an MX record for an upcoming project. Which of the following server types is MOST likely to be in scope for the project?
- A. Database
- B. Email
- C. Web
- D. File
正解：B
解説：
Explanation
An MX record is a type of DNS record that specifies the mail server responsible for accepting email messages on behalf of a domain name. Therefore, an engineer who needs to update an MX record is most likely working on an email server project
質問 # 52
A technician removes an old PC from the network and replaces it with a new PC that is unable to connect to the LAN. Which of the Mowing is MOST likely the cause of the issue?
- A. Port mirroring
- B. Port tagging
- C. Port aggregation
- D. Port security
正解：D
質問 # 53
Branch users are experiencing issues with videoconferencing. Which of the following will the company MOST likely configure to improve performance for these applications?
- A. Network load balancer
- B. Quality of service
- C. Link Aggregation Control Protocol
- D. Static IP addresses
- E. Dynamic routing
正解：B
解説：
Explanation
To improve performance for videoconferencing, the company should configure Quality of Service (QoS). This technology allows for the prioritization of network traffic, ensuring that videoconferencing traffic is given higher priority and therefore better performance. Link Aggregation Control Protocol (LACP), Dynamic routing, Network load balancer, and Static IP addresses are not directly related to improving performance for videoconferencing.
References:
Network+ N10-007 Certification Exam Objectives, Objective 2.6: Given a scenario, implement and configure the appropriate wireless security and implement the appropriate QoS concepts.
質問 # 54
An ISP is providing Internet to a retail store and has terminated its point of connection using a standard Cat 6 pin-out Which of me following terminations should the technician use when running a cable from the ISP's port lo the front desk?
- A. SC
- B. TIA/E1A-56S-B
- C. LC
- D. F-type connector
正解：B
解説：
The termination that the technician should use when running a cable from the ISP's port to the front desk is B. TIA/EIA-568-B. This is a standard pin-out for Cat 6 cables that is used for Ethernet and other network physical layers1. It specifies how to arrange the eight wires in an RJ45 connector, which is a common type of connector for network cables.
質問 # 55
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Comptia N10-008試験は、以前のネットワーク+認証試験（N10-007）の更新バージョンであり、ネットワーキングにおける最新のトレンドとテクノロジーを反映するために改訂されています。この試験には、クラウドコンピューティング、仮想化、ネットワーク自動化などの新しいトピックが含まれています。 N10-008試験は、ネットワークを扱った経験があり、分野でのスキルと知識を検証したい個人向けに設計されています。この試験に合格すると、候補者はネットワーキングの概念を基本的に理解しており、さまざまな設定でネットワークの構成、管理、トラブルシューティングが可能であることが示されています。
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