A utility company has installed a wireless device at a residence that allows the company to view power consumption online. The resident reports the 802.11ac home wireless intermittently loses connectivity for about 15 minutes twice a day.
Which of the following is the MOST likely cause?

A network engineer for a manufacturing company is implementing a wireless network that provides reliable coverage throughout the facility. There are several large, electric, motorized machines installed on the shop floor for automating the manufacturing process. These machines are known to be significant sources of RF interference. Which of the following frequencies should the wireless network use to MINIMIZE this interference?

Users in a school lab are reporting slow connections to the servers and the Internet. Other users in the school have no issues. The lab has 25 computers and is connected with a single 1Gb Ethernet connection on Cat 5e wiring to an unmanaged switch. There are also three spare Cat 5e cable runs, which are not in use. The school wants to double the connection speed between the lab and the servers without running new cables. Which of the following would be the BEST solution?

Which of the following protocols would Kurt, a technician, use to synchronize local date and time of a client workstation to that of a server?

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?