Quiz-2

What is the purpose of the OSI physical layer?

• • controlling access to media

• • performing error detection on received frames

• • transmitting bits across the local media

• • exchanging frames between nodes over physical network media

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 typically contains 4 pairs of fiber-optic wires.

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

• • It is more expensive than UTP cabling is.

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

Which three basic parts are common to all frame types supported by the data link layer? (Choose three.)

• • header

• • type field

• • MTU size

• • data

• • trailer

What OSI physical layer term describes the amount of time, including delays, for data to travel from one point to another?

• • latency

• • fiber-optic cable

• • air

• • copper cable

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 is contained in the trailer of a data-link frame?

• • logical address

• • physical address

• • data

• • error detection

Which PDU format is used when bits are received from the network medium by the NIC of a host?

• • file

• • frame

• • packet

• • segment

Which method allows a computer to react accordingly when it requests data from a server and the server takes too long to respond?

• • encapsulation

• • flow control

• • access method

• • response timeout

Which of the following is the name for all computers connected to a network that participate directly in network communication?

• • Servers

• • Intermediary device

• • Host

• • media