CompTIA N10-008 Practice Test - Questions Answers, Page 78

Channel bonding is a technique that allows two or more adjacent channels to be combined into a wider channel, increasing the data rate and throughput of the wireless network. Channel bonding can improve the performance of the Wi-Fi network by utilizing more of the available spectrum and reducing interference from other devices. Channel bonding is supported by Wi-Fi 5 (802.11ac) and Wi-Fi 6 (802.11ax) standards.

netstat is a command-line tool that displays network connections, routing tables, interface statistics, and more. It can help the technician identify which processes or applications are using the network bandwidth on the user's computer. netstat can also show the current bandwidth usage in bytes per second for each network interface.

Reference

netstat - Wikipediaprovides an overview of the netstat tool and its features.

How to get current bandwidth usage from command line using built-in Linux tools? - Super Userexplains how to use netstat and other tools to monitor bandwidth usage on Linux systems.

Get network utilization from command line - Super Usershows how to use typeperf and other tools to monitor bandwidth usage on Windows systems.

802.11 ax is the latest wireless standard that operates in both the 2.4GHz and the 5GHz bands. It offers higher throughput, lower latency, and improved efficiency compared to previous standards. It also uses technologies such as OFDMA and MU-MIMO to reduce interference and increase capacity in dense environments. Therefore, 802.11 ax is the best choice for a wireless network in an office building with high saturation on both bands.

Reference

Part 3 of current page talks about the benefits of 802.11 ax and how it improves network performance in congested areas1.

CompTIA Network+ N10-008 Exam Cramcovers the wireless standards and their characteristics in Chapter 5. It also provides practice questions and explanations for the exam.

The IP address ::1/128 is the loopback address of the local host in IPv6, which is the equivalent of the 127.0.0.1 in IPv4. The loopback address is a virtual interface that loops all traffic back to itself, the local host. The loopback address is used for testing and troubleshooting purposes, such as checking the connectivity and configuration of the network stack. If an application tries to reach the loopback address, it means that it is not communicating with any external network or server, but only with itself.

The other options are not correct because they are not associated with the IP address ::1/128. They are:

APIPA. APIPA stands for Automatic Private IP Addressing, which is a feature that allows a device to assign itself a private IPv4 address in the range of 169.254.0.0/16 when no DHCP server is available. APIPA does not apply to IPv6 addresses, and it is not related to the loopback address.

Default gateway. The default gateway is the IP address of the router or device that connects a local network to other networks. The default gateway is usually the first or last usable IP address in a subnet, and it is not the same as the loopback address.

Link local. Link local addresses are IPv6 addresses that are used for communication within a single network segment or link. Link local addresses have the prefix fe80::/10, and they are not routable or reachable from other networks. Link local addresses are not the same as the loopback address.

Reference 1:Loopback Address - ::1/128 - ipUpTime.net 2:Network+ (Plus) Certification | CompTIA IT Certifications 3:Reserved IP addresses - Wikipedia

An A record, also known as an address record, is a type of DNS record that maps a hostname to an IPv4 address. An A record is used to resolve a domain name to an IP address, so that clients can connect to the server or service by using the domain name instead of the IP address. For example, an A record can map www.example.com to 192.0.2.1.

An A record is the most common type of DNS record for cloud DNS, as it allows the company to use a custom domain name for their cloud services, such as web hosting, email, or storage. An A record can also be used to create subdomains, such as blog.example.com or mail.example.com, that point to different IP addresses or servers.

The other options are not correct because they are not the best type of DNS record for cloud DNS. They are:

MX. MX stands for mail exchange, and it is a type of DNS record that specifies the mail servers that are responsible for receiving and delivering email messages for a domain name. MX records are used for email services, but they are not sufficient for cloud DNS, as they do not map a hostname to an IP address.

CNAME. CNAME stands for canonical name, and it is a type of DNS record that specifies an alias name for another domain name. CNAME records are used to create multiple names for the same IP address or server, such as www.example.com and example.com. CNAME records are useful for cloud DNS, but they are not the best type, as they depend on another A record to resolve the IP address.

NS. NS stands for name server, and it is a type of DNS record that delegates a DNS zone to an authoritative server. NS records are used to specify which DNS servers are responsible for answering queries for a domain name or a subdomain. NS records are essential for cloud DNS, but they are not the best type, as they do not map a hostname to an IP address.

Reference 1:DNS records overview | Google Cloud 2:Network+ (Plus) Certification | CompTIA IT Certifications 3:ClouDNS: What is a DNS record?

According to the CompTIA Network+ N10-008 Cert Guide, the first step in the troubleshooting process is to identify the problem.This involves gathering information, understanding the symptoms, and clarifying the exact nature of the issue before proceeding to other steps like establishing theories or testing them1.

The users are unable to navigate to websites on the internet but can access local network resources, indicating a possible DNS issue.The ping command result showing ''TTL expired in transit'' suggests that packets are not reaching their destination due to a DNS misconfiguration that is not resolving website names into IP addresses correctly3.A possible solution is to check and correct the DNS server settings on the network devices4.

A CNAME record is a type of DNS record that maps an alias name to a canonical name, or the primary domain name. A CNAME record is used to create subdomains or alternative names for the same website, without having to specify the IP address for each alias. For example, a CNAME record can map www.example.com to example.com, or mail.example.com to example.com.Reference:CompTIA Network+ N10-008 Cert Guide, Chapter 2, Section 2.4

BGP stands for Border Gateway Protocol, and it is a routing protocol that is used to exchange routing information between different autonomous systems (AS) on the Internet. An AS is a network or a group of networks that are under the same administrative control and share a common routing policy. BGP is used to create routes between local area networks and Internet service providers (ISPs), as well as between different ISPs. BGP is considered an exterior gateway protocol (EGP), as opposed to an interior gateway protocol (IGP) such as EIGRP, RIP, or OSPF, which are used to create routes within an AS.Reference:CompTIA Network+ N10-008 Cert Guide, Chapter 3, Section 3.4