A network engineer is conducting an assessment for a customer that wants to implement an 802.11n wireless network. Before the engineer can estimate the
number of WAPs needed, it is important to reference which of the following?

Upon arrival at work, an administrator is informed that network users cannot access the file server. The administrator logs onto the server and sees the updates
were automatically installed and the network connection shows limited and no availability. Which of the following needs to be rolled back?

A network administrator wants to deploy a wireless network in a location that has too much RF interference at 2.4 GHz. Which of the following standards requires
the use of 5 GHz band wireless transmissions? (Select TWO)

A network technician has configured a point-to-point interface on a router, however, once the fiber optic cables have been run, the interface will not come up. The
technician has cleaned the fiber connectors and used an optical power meter to confirm that light is passing in both directions without excessive loss. Which of the
following is the MOST likely cause?

A network technician is using telnet to connect to a router on a network that has been compromised. A new user and password has been added to the router with
full rights. The technician is concerned that the regularly used administrator account has been compromised. After changing the password on all networking
devices, which of the following should the technician perform to prevent the password for the administrator account from being sniffed on the network?