Cisco 1, Module 4

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

• data link layer

• physical layer

• presentation layer

• network layer

What is indicated by the term throughput?

• the guaranteed data transfer rate offered by an ISP

• the measure of the usable data transferred across the media

• the time it takes for a message to get from sender to receiver

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

• the capacity of a particular medium to carry data

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 characteristic describes crosstalk?

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

• the distortion of the network signal from fluorescent lighting

• the weakening of the network signal over long cable lengths

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

A wireless LAN is being deployed inside the new one room office that is occupied by the park ranger. The office is located at the highest part of the national park. After network testing is complete, the technicians report that the wireless LAN signal is occasionally affected by some type of interference. What is a possible cause of the signal distortion?

• the elevated location where the wireless LAN was installed

• the microwave oven

• the large number of trees that surround the office

• the number of wireless devices that are used in the wireless LAN

What is the definition of bandwidth?

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

• the speed at which bits travel on the network

• the speed of bits across the media over a given period of time

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

Which statement correctly describes frame encoding?

• It transmits data signals along with a clock signal which occurs at evenly spaced time durations.

• It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.

• It generates the electrical, optical, or wireless signals that represent the binary numbers of the frame.

• It uses the characteristic of one wave to modify another wave.

What is a characteristic of UTP cabling?

• woven copper braid or metallic foil

• cladding

• immunity to electrical hazards

• cancellation

What is a characteristic of STP cabling?

• woven copper braid or metallic foil

• cladding

• immunity to electrical hazards

• cancellation

What type of cable is used to connect a workstation serial port to a Cisco router console port?

• crossover

• rollover

• straight-through

• coaxial