CST 1213: Networking Unit 5 Student Review Questions

What three factors can degrade network performance?

1. Noise 2. Attenuation 3. Latency

List the three types of multiplexing used on copper lines.

1. TDM (time division multiplexing) 2. STDM (statistical time division multiplexing) 3. FDM (frequency division multiplexing)

List the three types of multiplexing used in fiber optics.

1. WDM (wavelength division multiplexing) 2. DWDM (dense wavelength division multiplexing) 3. CWDM (course wavelength division multiplexing)

Select the two most common types of noise sources: A. EMI B. Static C. Cellular D. Crosstalk

A and D

What is an advantage and disadvantage to a high twist ratio in a twisted-pair cable.

A high twist ratio allows for better protection against noise. However, more twists means more cable is needed which causes attenuation.

What are some ways to limit noise?

One way is to make sure the signal strength exceeds the noise. Cable design and proper installation are also essential for reducing noise.

Which one of the following is not a type of crosstalk? A. TEXT B. NEXT C. FEXT D. alien

A. TEXT

Modern LANs use ____ or higher wiring, which is the minimum required to support Gigabit Ethernet. A. Cat 5 B. Cat 5e C. Cat 6 D. Cat 7

B. Cat 5e

In networking, throughput and bandwidth are commonly expressed as bits transmitted per second, called ______ ______. A. data rate B. bit rate C. data speed D. bit speed

B. bit rate

What device is used to compensate for attenuation by regenerating digital signal in its original form? A. Reducer B. Router C. Repeater D. Attenuator

C. Repeater

This TIA/EIA 568 category is backwards compatible with Cat 5, Cat 5e, and Cat 6 cabling, which means it can replace lower-level cabling without requiring equipment or connector changing.

Cat 6a

Networks rely on ______ to increase the amount of data that can be transmitted in a given timespan over a given bandwidth. A. Duplex B. Half duplex C. Simplex D. Multiplex

D. Multiplex

What are the two types of connectors used for coax cables?

F-connectors and BNC connectors

Gigabits per second (Gbps) are 1,000,000 bits per second. T or F

F: Megabits (Mb) are 1,000,000 bits; Gigabits are 1,000,000,000

Cable Internet service entering your home is RG-59. T or F

F: RG-59 suffers from attenuation and is not suited to delivering signals over long distances used by cable ISPs. RG-6 is used.

What is the most common method to measure latency? What is the unit of measure for it?

RTT (round trip time) is the time it takes a packet to go from the sender to receiver and back again. It is measured in milliseconds.

Gigabit Ethernet networks use all four pairs in a twisted-pair cable for both sending and receiving. T or F

T

The length of a cable affects latency. T or F

T

What is the difference between throughput and bandwidth?

Throughput is the measure of how much data is actually transmitted during a given period of time. Bandwidth is the theoretical amount of data that can be transmitted during a given period of time.

In Windows you can use Device Manager to configure a NIC, including _____ and _____.

speed; duplex