CompTIA Updated N10-009 Exam Questions and Answers by zak

The correct answer is A. ESSID . An ESSID (Extended Service Set Identifier) is used when multiple wireless access points are configured to present the same wireless network name (SSID) across a larger coverage area, such as an entire building or campus floor. This allows users to move from one location to another while remaining connected to what appears to be a single wireless network. In practice, this supports seamless roaming between APs when they are properly configured with the same SSID, compatible security settings, and coordinated channel planning.

The other options do not fit the requirement. Wireless mesh is a topology that allows APs to connect to one another wirelessly, but it does not by itself describe using one common WLAN name across all APs. Band steering pushes dual-band clients toward the 5 GHz or 6 GHz band for better performance; it is not about creating one building-wide WLAN name. WPA3 is a wireless security standard and relates to encryption and authentication, not SSID design.

The key phrase in the question is “a single wireless LAN name across the entire building” , which points directly to an ESSID deployment.

The correct answer is A. IaC . Infrastructure as Code is used to define and deploy infrastructure through templates, configuration files, or code rather than building everything manually. During a cloud migration, that approach helps keep deployments consistent across environments and reduces the chance of human error.

This fits the question especially well because it mentions consistency, reliability, and efficiency in both provisioning and management. Those are exactly the kinds of benefits IaC is meant to provide. Instead of configuring servers, networks, and services one by one, administrators can reuse tested deployment definitions and apply the same settings repeatedly. That makes rollouts faster and easier to audit.

The other options do not match the task. A CDN improves content delivery performance. SASE is a networking and security architecture. ZTA focuses on access control and trust decisions. All of those are important in the right context, but none is primarily a provisioning and management automation tool.

In a cloud migration, the organization usually wants repeatable builds, standardization, and faster recovery if something has to be recreated. That is why IaC is the strongest answer here. It directly supports automated, dependable, and scalable infrastructure deployment.

A cold site is a backup facility that provides infrastructure (such as power, cooling, and space) but does not have active IT resources installed. When a disaster occurs, IT teams must bring in and configure all necessary hardware and software before services can resume. This process can take weeks or longer—which matches the scenario described.

•Why not the other options?

•Hot site (A) – A hot site is a fully operational backup facility with up-to-date data and pre-configured hardware, allowing almost instant failover (minutes to hours).

•Warm site (B) – A warm site has pre-installed hardware and some software/configurations, but it requires some setup before becoming fully operational (hours to a few days).

•Active-active approach (D) – This means that multiple sites run simultaneously with load balancing, ensuring no downtime in case of a failure.

To support 126 users, the subnet must provide at least 126 usable host addresses. In IPv4 subnetting, usable hosts are calculated as: (2^(host bits)) − 2, subtracting the network and broadcast addresses.

A /25 leaves 7 host bits (because 32 − 25 = 7). That yields 2^7 = 128 total addresses, and 128 − 2 = 126 usable—an exact fit and therefore the most efficient option listed.

A /24 provides 256 total addresses and 254 usable, which would waste more addresses than necessary. A /23 provides 512 total addresses and 510 usable—far more waste. A /26 leaves 6 host bits, giving 64 total addresses and 62 usable, which is not enough for 126 users.

The 10.2.2.0 address is within the private 10.0.0.0/8 range, so it’s appropriate for internal addressing. Therefore, 10.2.2.0/25 is the correct CIDR range for efficiently supporting 126 hosts.