quiz 4 (it exam)

Which three steps must be completed to manually connect an Android or IOS device to a secured wireless network? (Choose three.)

• Set the IP address.Activate the Bluetooth antenna

• Input the authentication password.

• Enter the network SSID.

• Choose the correct security type.

• Change the MAC address

What is one main characteristic of the data link layer?

• It generates the electrical or optical signals that represent the 1 and 0 on the media.

• It converts a stream of data bits into a predefined code

• It shields the upper layer protocol from being aware of the physical medium to be used in the communication.

• It accepts Layer 3 packets and decides the path by which to forward a frame to a host on a remote network.

A network administrator is required to upgrade wireless access to end users in a building. To provide data rates up to 1.3 Gb/s and still be backward compatible with older devices, which wireless standard should be implemented?

• 802.11n

• 802.11ac

• 802.11g

• 802.11b

Which statement is correct about multimode fiber?

• Multimode fiber cables carry signals from multiple connected sending devices.

• Multimode fiber commonly uses a laser as a light source

• SC-SC patch cords are used with multimode fiber cables.

• Multimode fiber has a thinner core than single-mode fiber..

How is the magnetic field cancellation effect enhanced in UTP cables?

• by increasing the thickness of the PVC sheath that encases all the wires

• by increasing and varying the number of twists in each wire pair

• by increasing the thickness of the copper wires

• by decreasing the number of wires that are used to carry data

Which statement describes signaling at the physical layer?

• Sending the signals asynchronously means that they are transmitted without a clock signal.

• In signaling, a 1 always represents voltage and a 0 always represents the absence of voltage.

• Wireless encoding includes sending a series of clicks to delimit the frames.

• Signaling is a method of converting a stream of data into a predefined code

Single-mode Fiber

• only one ray of light into the fiber

• laser as light source

• generally used for campus backbone

• several paths of light into the fiber

Multimode Fiber

• LED as light source

• several paths of light into the fiber

• generally used with LANs

• only one ray of light into the fiber

What is the definition of bandwidth?

• the measure of usable data transferred over a given period of time

• the speed at which bits travel on the network

• the measure of the transfer of bits across the media over a given period of time

• the amount of data that can flow from one place to another in a given amount of time

What is a role of the Logical Link Control sublayer?

• to provide data link layer addressing

• to provide access to various Layer 1 network technologies

• to define the media access processes performed by network hardware

• to mark frames to identify the network layer protocol being carried