Module 4-7

What action will occur if a switch receives a frame and does have the source MAC address in the MAC table?

• The switch refreshes the timer on that entry.

• The switch does not forward the frame.

• The switch shares the MAC address table entry with any connected switches.

• The switch adds it to its MAC address table associated with the port number.

Which two devices commonly affect wireless networks? (Choose two.)

• incandescent light bulbs

• external hard drives

• home theaters

• cordless phones

• microwaves

A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)

• the amount of traffic that is currently crossing the network

• the sophistication of the encapsulation method applied to the data

• the type of traffic that is crossing the network

• the latency that is created by the number of network devices that the data is crossing

• the bandwidth of the WAN connection to the Internet

What are two characteristics of fiber-optic cable? (Choose two.)

• It is not affected by EMI or RFI.

• Each pair of cables is wrapped in metallic foil.

• It combines the technique of cancellation, shielding, and twisting to protect data.

• It typically contains 4 pairs of fiber-optic wires

• It is more expensive than UTP cabling is

What is a primary role of the Physical layer in transmitting data on the network?

• create the signals that represent the bits in each frame on to the media

• provide physical addressing to the devices

• determine the path packets take through the network

• control data access to the media

With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?

• the magnetic field around the adjacent pairs of wire

• the use of braided wire to shield the adjacent wire pairs

• the reflection of the electrical wave back from the far end of the cable

• the collision caused by two nodes trying to use the media simultaneously

Refer to the graphic. What type of cabling is shown?

• STP

• UTP

• coax

• fiber

In addition to the cable length, what two factors could interfere with the communication carried over UTP cables? (Choose two.)

• crosstalk

• bandwidth

• size of the network

• signal modulation technique

• electromagnetic interference

Refer to the graphic. What type of cabling is shown?

• STP

• UTP

• coax

• fiber

Which two devices commonly affect wireless networks? (Choose two.)

• Blu-ray players

• home theaters

• cordless phones

• microwaves

• incandescent light bulbs