"Use private VLANs: Also known as port isolation, creating a private VLAN is a method of restricting switch ports (now called private ports) so that they can communicate only with a particular uplink. The private VLAN usually has numerous private ports and only one uplink, which is usually connected to a router, or firewall."

Explanation
802.11n is a wireless standard that supports up to 600 Mbps data rate and operates in both the 2.4 GHz and 5 GHz frequency bands. 802.11n uses multiple-input multiple-output (MIMO) technology to increase the number of spatial streams and improve the wireless performance and range. 802.11n meets the requirements of the wireless network design.
References: Network+ Study Guide Objective 1.6: Explain the functions of network services.

Explanation
No more patches or bug fixes are available indefinitely. This indicates that a computer has reached end-of-support, which means that the manufacturer or vendor of the hardware or software no longer provides technical assistance, updates, or security fixes for the product12. This can expose the computer to potential security risks and compatibility issues with newer technologies

When connecting two unmanaged switches together, the use of a straight-through Ethernet cable is typically incorrect unless the switches support auto-mdix (automatic medium-dependent interface crossover), which automatically adjusts the connection to allow for different types of cables. Older or more basic unmanaged switches often require a crossover cable when connecting similar devices (switch-to-switch or hub-to-hub) to ensure the transmit pins on one end match the receive pins on the other end. This allows data to flow correctly between the two devices. Since the uplinks are not on, it suggests that the correct pin alignment is not being achieved with the straight-through cable, and a crossover cable should be used instead.