The technology that allows multiple networks to traverse a switch is VLAN (Virtual Local Area
Network) which is a logical grouping of devices on the same network regardless of their physical
location12.
Virtual Local Area Network (VLAN) technology can allow multiple networks to traverse a switch. A
VLAN is a logical network created within a physical network that can separate traffic and allow
multiple networks to coexist on the same physical network infrastructure. VRRP (Virtual Router
Redundancy Protocol), VPN (Virtual Private Network), and DHCP (Dynamic Host Configuration
Protocol) do not allow multiple networks to traverse a switch.

Reference: CompTIA A+ Certification
Exam: Core 1 - Objective 3.2

To increase the performance of a laptop working with a large database stored on drive C, a systems
administrator should increase the RAM and migrate to an SSD. Increasing the RAM will help the
laptop to better handle the large database, while migrating to an SSD will improve the speed at
which the laptop can access the database. Configuring RAID 1, installing a hybrid drive, upgrading to
a 1GB NIC, and upgrading the power supply will not directly improve the laptop's performance when
working with a large database.

Reference: CompTIA A+ Certification Exam: Core 1 - Objective 3.1

The 802.11n wireless networking standard supports Multiple Input Multiple Output (MIMO)
technology. MIMO technology uses multiple antennas on both the transmitting and receiving devices
to improve wireless performance by increasing the amount of data that can be transmitted
simultaneously. 802.11a, 802.11b, and 802.11g do not support MIMO technology.

Reference:
CompTIA A+ Certification Exam: Core 1 - Objective 3.3

The issue of video but no audio on a projector in a conference room can be resolved by utilizing an
HDMI connection between the PC and the projector. HDMI supports both video and audio signals
and is commonly used to connect a PC to a projector for presentations. Changing the input on the
projector to VGA, changing the output on the PC to DVI, or modifying the projector's refresh rate will
not resolve the issue.
Reference: CompTIA A+ Certification Exam: Core 1 - Objective 2.5

An administrator would use Infrastructure as a Service (IaaS) to migrate virtual machines from on￾premises to the cloud. IaaS is a cloud computing service that provides virtualized computing
resources, such as servers, storage, and networking, that can be used to deploy and run applications
in the cloud. By using IaaS, an administrator can create a virtual machine in the cloud and migrate
the existing virtual machine from on-premises to the cloud.

Reference: CompTIA A+ Certification
Exam: Core 1 - Objective 3.3