CCNA1 Module 4-5-6

Why are two strands of fiber used for a single fiber optic connection?

• The two strands allow the data to travel for longer distances without degrading.
• They prevent crosstalk from causing interference on the connection.
• They increase the speed at which the data can travel.
• They allow for full-duplex connectivity.

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

• It is usually cheaper than copper cabling.
• It is able to be installed around sharp bends.
• It is easier to terminate and install than copper cabling.
• It is able to carry signals much farther than copper cabling.

What is one advantage of using fiber optic cabling rather than copper cabling?

• It is usually cheaper than copper cabling.
• It is able to be installed around sharp bends.
• It is easier to terminate and install than copper cabling.
• It is able to carry signals much farther than copper cabling.

A network administrator is designing a new network infrastructure that includes both wired and wireless connectivity. Under which situation would a wireless connection be recommended?

• The end-user device only has an Ethernet NIC.
• The end-user device requires a dedicated connection because of performance requirements.
• The end-user device needs mobility when connecting to the network.
• The end-user device area has a high concentration of RFI.

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

• Console
• Rollover
• Crossover
• Straight-through

What is the definition of bandwidth?

• The speed of bits across the media over a given period of time
• The speed at which bits travel on the network
• The amount of data that can flow from one place to another in a given amount of time
• The measure of usable data transferred over a given period of time

Which statement correctly describes frame encoding?

• It uses the characteristic of one wave to modify another wave.
• It transmits data signals along with a clock signal which occurs at evenly spaced time durations.
• It generates the electrical, optical, or wireless signals that represent the binary numbers of the frame.
• It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.

What is a characteristic of UTP cabling?

• Cancellation
• Cladding
• Immunity to electrical hazards
• Woven copper braid or metallic foil

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

What is the binary representation for the decimal number 173?

• 10100111
• 10100101
• 10101101
• 10110101