CCNA 1 v7 Ethernet Concepts Quiz

What is the purpose of the OSI physical layer?

• performing error detection on received frames

• exchanging frames between nodes over physical network media

• transmitting bits across the local media

• controlling access to media

Which characteristic describes crosstalk?

• the weakening of the network signal over long cable lengths

• the distortion of the transmitted messages from signals carried in adjacent wires

• the distortion of the network signal from fluorescent lighting

• the loss of wireless signal over excessive distance from the access point

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

• designing a cable infrastructure to avoid crosstalk interference

• avoiding sharp bends during installation

• wrapping the bundle of wires with metallic shielding

• twisting opposing circuit wire pairs together

What are two characteristics of fiber-optic cable?

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

• It is not affected by EMI or RFI.

• 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?

• determine the path packets take through the network

• control data access to the media

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

• provide physical addressing to the devices

Which two devices commonly affect wireless networks?

• home theaters

• cordless phones

• microwaves

• external hard drives

What is the function of the CRC value that is found in the FCS field of a frame?

• to verify the physical address in the frame

• to compute the checksum header for the data field in the frame

• to verify the logical address in the frame

• to verify the integrity of the received frame

Which statement describes a characteristic of the frame header fields of the data link layer?

• They vary depending on protocols.

• Ethernet frame header fields contain Layer 3 source and destination addresses.

• They include information on user applications.

• They all include the flow control and logical connection fields.

What action will occur if a switch receives a frame with the destination MAC address FF:FF:FF:FF:FF:FF?

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

• The switch sends the frame to a connected router.

• The switch does not forward the frame.

• The switch forwards it out all ports except the ingress port.

What is the auto-MDIX feature on a switch?

• 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

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

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