Quiz-Session8

What is the purpose of the OSI physical layer?

• • controlling access to media

• • transmitting bits across the local media

• • performing error detection on received frames

• • exchanging frames between nodes over physical network media

Which procedure is used to reduce the effect of crosstalk in copper cables?

• • requiring proper grounding connections

• • twisting opposing circuit wire pairs together

• • wrapping the bundle of wires with metallic shielding

• • designing a cable infrastructure to avoid crosstalk interference

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

What three items are contained in an Ethernet header and trailer? (Choose three.)

• • source IP address

• • source MAC address

• • destination IP address

• • destination MAC address

• • error-checking information

What is the auto-MDIX feature on a switch?

• • the automatic configuration of an interface for 10/100/1000 Mb/s operation

• • the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection

• • the automatic configuration of full-duplex operation over a single Ethernet copper or optical cable

• • the ability to turn a switch interface on or off accordingly if an active connection is detected

What are two examples of the cut-through switching method? (Choose two.)

• • store-and-forward switching

• • fast-forward switching

• • CRC switching

• • fragment-free switching

• • QOS switching

Which type of UTP cable is used to connect a PC to a switch port?

• • console

• • rollover

• • crossover

• • straight-through

What OSI physical layer term describes the physical medium that uses the propagation of light?

• • fiber-optic cable

• • goodput

• • latency

• • throughput

What is the purpose of the FCS field in a frame?

• • to obtain the MAC address of the sending node

• • to verify the logical address of the sending node

• • to compute the CRC header for the data field

• • to determine if errors occurred in the transmission and reception