An email server, which is called "Frederick," has an IPv6 address of 2001:5689:23:ABCD:6A, but most users call it "Fred" for short. Which of the following DNS entries is needed so the alias "Fred" can also be used?

Workstations are unable to access the Internet after a recent power outage. Configure the appropriate devices to ensure ALL workstations have Internet connectivity.
Instructions: All ports can be enabled (green) or disabled (red). When you have completed the simulation please select the Done button.

A technician has replaced a customer's desktop with a known-good model from storage. However, the replacement desktop will not connect to network resources. The technician suspects the desktop has not been kept up to date with security patches. Which of the following is MOST likely in place?

A network technician has deployed a new 802.11ac network and discovers some of the legacy POS equipment only supports WPA and 802.11a. Which of the following is the MOST secure method of connecting all devices while avoiding a performance impact to modern wireless devices?

A MAC address is a part of which of the following OSI model layers?