N10-008 Exam Dumps - CompTIA Network+ Questions and Answers

• The question asks about the least amount of redundancy for a company’s network that wants to add a local backup data center.
• The answer is not B, because a hot site is a fully operational data center that can take over the primary site’s functions immediately in case of a disaster. It has the most amount of redundancy, as it replicates the primary site’s data, applications, and hardware.
• The answer is not C, because a cloud site is a data center that is hosted by a third-party provider on the internet. It can provide a high level of redundancy, as it can scale up or down according to the demand and availability of resources. It also offers flexibility and cost-efficiency for the company.
• The answer is not D, because a warm site is a partially operational data center that can take over the primary site’s functions within a short time in case of a disaster. It has a moderate amount of redundancy, as it has some of the primary site’s data, applications, and hardware, but not all of them.
• The answer is A, because a cold site is a data center that is not operational and requires a lot of time and effort to set up and activate in case of a disaster. It has the least amount of redundancy, as it has none of the primary site’s data, applications, or hardware. It only has the basic infrastructure, such as power, cooling, and network connectivity.

References:

• : CompTIA Network+ N10-008 Study Guide, Chapter 5: Network Management, Section 5.3: Network Disaster Recovery, p. 295
• : CompTIA Network+ N10-008 Study Guide, Chapter 5: Network Management, Section 5.3: Network Disaster Recovery, p. 296
• : CompTIA Network+ N10-008 Study Guide, Chapter 5: Network Management, Section 5.3: Network Disaster Recovery, p. 297
• : CompTIA Network+ N10-008 Study Guide, Chapter 5: Network Management, Section 5.3: Network Disaster Recovery, p. 298

The most likely cause of the intermittent connectivity issues when specific Wireless Access Points (WAPs) are turned on and share channel five is interference. Wireless interference occurs when multiple devices operate on the same channel within close proximity to each other, leading to signal congestion and reduced performance. This type of interference can cause the connectivity to be sporadic, as described. Other options like polarization, incorrect channel (since they are on the intended channel), or low power levels would generally not cause intermittent issues strictly when WAPs are turned on​​.

The 802.11n standard is the most suitable option for this scenario. It operates in both the 2.4GHz and 5GHz frequency bands, providing better performance and higher data rates compared to older standards like 802.11b and 802.11g.

• 802.11n (also known as Wi-Fi 4): This standard supports multiple-input and multiple-output (MIMO) technology, which allows for better coverage, increased throughput, and improved reliability. It operates in both the 2.4GHz and 5GHz frequency bands, making it compatible with a wide range of devices. The 5GHz band provides less interference and higher data rates, making it suitable for modern networks.
• 802.11b: This older standard operates only in the 2.4GHz band and has a maximum data rate of 11 Mbps. It is not recommended for high-performance networks.
• 802.11g: This standard also operates in the 2.4GHz band and offers a maximum data rate of 54 Mbps. While it is faster than 802.11b, it is still not as efficient as 802.11n.

References:

• Professor Messer’s Network+ Study Guide
• CompTIA Network+ N10-008 Study Guide

Jitter is the variation in the delay of data packets over a network. It is caused by factors such as network congestion, routing changes, packet loss, or improper queuing. Jitter affects the quality of VoIP calls because it can cause gaps, distortion, or out-of-order delivery of voice data. Jitter can be measured by the difference between the expected and actual arrival times of packets2. To reduce jitter, VoIP systems use buffers to store and reorder packets before playing them back. However, too much buffering can also increase latency, which is the total time it takes for data to travel from one point to another3.

References2 - VoIP Troubleshooting: 5 Fixes for Common Connection Issues - Nextiva3 - Troubleshooting VoIP — Is it You or the Network? - PingPlotter

To define the location where VoIP phones can download configuration files, the network administrator can use scope options within the Dynamic Host Configuration Protocol (DHCP) service. Scope options are a set of values that can be configured within a DHCP scope, which defines a range of IP addresses that can be leased to clients on a network. One of the scope options that can be configured is the option for the location of the configuration file server, which specifies the URL or IP address of the server where the configuration files can be downloaded.

https://pbxbook.com/voip/dhcpcfg.html

SSL is a widely used protocol for establishing secure, encrypted connections between devices over the Internet. It is typically used to secure communication between web browsers and servers, and can be easily enabled on a server by installing an SSL certificate.

Cat 7 is a type of twisted-pair copper cable that supports up to 40 Gbps bandwidth and up to 100 meters cable length. Cat 7 is suitable for long cable runs that require high-speed data transmission. Cat 7 has better shielding and crosstalk prevention than lower categories of cables.

References: Network+ Study Guide Objective 1.5: Compare and contrast network cabling types, features and their purposes.

STP stands for Spanning Tree Protocol, which is a network protocol that prevents loops in a switched network by blocking redundant links. STP allows only one active path between any two network devices, and dynamically reconfigures the network topology in case of link failures or changes. STP is essential for proper stability of the network switches, especially when they are cabled in a redundant or complex topology that involves multiple switches and firewalls. Without STP, loops can cause broadcast storms, MAC address table instability, and duplicate frames, which can degrade the network performance and availability. References: [CompTIA Network+ Certification Exam Objectives], Spanning Tree Protocol (STP) Explained | NetworkLessons.com

• Port 23 is used by Telnet, an insecure protocol that sends data in plain text over the network. Telnet should be replaced by SSH, which uses port 22 and encrypts the data.
• Port 69 is used by TFTP, an insecure protocol that transfers files without authentication or encryption. TFTP should be replaced by SFTP or FTPS, which use port 22 or 990 respectively and encrypt the data.
• Port 443 is used by HTTPS, a secure protocol that encrypts the data using SSL/TLS certificates. HTTPS should be preferred over HTTP, which uses port 80 and sends data in plain text.
• Port 587 is used by SMTP, a protocol that sends email messages. SMTP can be secured by using STARTTLS, which initiates encryption after the initial handshake. Alternatively, port 465 can be used for SMTPS, which encrypts the data from the start.
• Port 8080 is used by HTTP proxy, a protocol that allows clients to access web servers through an intermediary. HTTP proxy can be secured by using HTTPS proxy, which uses port 443 and encrypts the data.

References:

• CompTIA Network+ N10-008 Study Guide, Chapter 2: Network Protocols and Services, pages 62-63, 66-67, 69-70, 72-73, 75-76.
• Professor Messer’s CompTIA N10-008 Network+ Course Notes, Section 2.1: Common TCP and UDP Ports, pages 16-17.
• Professor Messer’s CompTIA N10-008 Network+ Training Course, Video 2.1: Common TCP and UDP Ports, 6.

The best option for the administrator to take would be to attempt to connect to the site via IP address. This will help to determine if the issue is related to the website's DNS address or if the site itself is not accessible. Checking for certificate issues may be necessary, but this should be done after the administrator has attempted to connect to the site via IP address. Contacting the ISP is unnecessary since the issue is related to the website inside of the company network, and checking the NTP configuration is not relevant to this issue.

When a customer is having issues connecting to a website using a URL, one of the first troubleshooting steps a network administrator should take is attempting to connect to the site using the IP address of the website. This will help to determine if the issue is related to a DNS resolution problem or a connectivity problem. If the administrator is able to connect to the website using the IP address, then the issue may be related to a DNS problem. However, if the administrator is still unable to connect, then the issue may be related to a connectivity problem. In either case, further troubleshooting steps will be necessary. Checking for certificate issues or NTP configuration, and contacting the ISP would not be the BEST initial steps in this scenario.

Creating a plan of action is the step of the troubleshooting methodology that would most likely include checking through each level of the OSI model after the problem has been identified. According to the web search results, the troubleshooting methodology consists of the following steps: 12

• Define the problem: Identify the symptoms and scope of the problem, and gather relevant information from users, devices, and logs.
• Establish a theory: Based on the information collected, hypothesize one or more possible causes of the problem, and rank them in order of probability.
• Test the theory: Test the most probable cause first, and if it is not confirmed, eliminate it and test the next one. Repeat this process until the root cause is found or a new theory is needed.
• Create a plan of action: Based on the confirmed cause, devise a solution that can resolve the problem with minimal impact and risk. The solution may involve checking through each level of the OSI model to ensure that all layers are functioning properly and that there are no configuration errors, physical damages, or logical inconsistencies34
• Implement the solution: Execute the plan of action, and monitor the results. If the problem is not solved, revert to the previous state and create a new plan of action.
• Verify functionality: Confirm that the problem is fully resolved and that the network is restored to normal operation. Perform preventive measures if possible to avoid recurrence of the problem.
• Document the findings: Record the problem description, the solution, and the outcome. Update any relevant documentation, such as network diagrams, policies, or procedures.

References1: Troubleshooting Methods for Cisco IP Networks 2: Troubleshooting Methodologies - CBT IT Certification Training 3: How to use the OSI Model to Troubleshoot Networks 4: How is the OSI model used in troubleshooting? – Sage-Answer

https://www.practicalnetworking.net/stand-alone/routing-between-vlans/#:~:text=A%20router%20will%20perform%20the,to%20communicate%20with%20one%20another .

To assign IPv6 addresses without DHCP, the technician can use SLAAC (Stateless Address Autoconfiguration). Here’s why:

• SLAAC: Stateless Address Autoconfiguration allows devices to automatically configure their IPv6 addresses based on the network prefix advertised by routers. It doesn’t rely on a central DHCP server for address assignment.
• APIPA (Automatic Private IP Addressing): This is an IPv4 feature and not applicable for IPv6.
• MAC reservation: This is related to DHCP and doesn’t directly assign IPv6 addresses.
• IPv4 to IPv6 tunnel: This is used for tunneling IPv6 traffic over an IPv4 network and doesn’t address address assignment.

Therefore, the correct answer is A. SLAAC

The fire suppression system is a design consideration when building out an IDF because it can affect the safety and reliability of the network equipment and cabling. A fire suppression system is a system that detects and extinguishes fires in a building, using water, gas, or chemicals. Depending on the type of fire suppression system, it can have different impacts on the IDF design, such as:

• Water-based systems, such as sprinklers, can damage the network equipment and cabling if they are activated by a fire or a false alarm. Therefore, the IDF should be designed to protect the equipment and cabling from water exposure, such as using waterproof cabinets, drip pans, and conduits.
• Gas-based systems, such as clean agent systems, can displace the oxygen in the IDF and cause suffocation for anyone inside. Therefore, the IDF should be designed to allow for ventilation and air circulation, as well as warning signs and alarms to alert anyone in the IDF before the gas is released.
• Chemical-based systems, such as dry chemical systems, can leave a residue on the network equipment and cabling that can affect their performance and lifespan. Therefore, the IDF should be designed to minimize the contact between the chemical and the equipment and cabling, as well as provide a means for cleaning and restoring them after a fire.

The other options are not correct because:

• The source panel amperage is not a design consideration when building out an IDF, as it is determined by the electrical circuit and the power needs of the network equipment and cabling. The source panel amperage does not affect the layout, location, or protection of the IDF.
• The humidity levels are not a design consideration when building out an IDF, as they are controlled by the HVAC system and the ventilation of the IDF. The humidity levels do not affect the layout, location, or protection of the IDF.
• The cable transmission speeds are not a design consideration when building out an IDF, as they are determined by the type and quality of the network cabling and the network equipment. The cable transmission speeds do not affect the layout, location, or protection of the IDF.