Cisco Networking Chapter 4

Which of the following attaches antennas to wireless devices? It can also be bundled with fiber-optic cabling for two-way data transmission.

Unshielded twisted-pair (UTP) Shielded twisted-pair (STP) Coaxial cable

Which of the following counters EMI and RFI by using shielding techniques and special connectors?

Unshielded twisted-pair (UTP) Shielded twisted-pair (STP) Coaxial cable

Which of the following is the most common network media?

Unshielded twisted-pair (UTP) Shielded twisted-pair (STP) Coaxial cable

Which of the following terminates with BNC, N type and F type connectors?

Unshielded twisted-pair (UTP) Shielded twisted-pair (STP) Coaxial cable

True or false. Wireless is not well suited for enterprise networks.

True False

The physical layer of the receiving device passes bits up to which higher level layer?

Application Data Link Network

Which of these is a measure of the transfer of bits across the media?

Bandwidth throughput goodput

Which of these is the name for the capacity of a medium to carry data?

Bandwidth throughput goodput

What is a characteristic of UTP cabling?

Cancellation Immunity to electrical hazards Cladding

Which media uses electrical pulses to represent bits?

Copper Wireless Fiber-optic

Which media uses patterns of light to represent bits?

Copper Wireless Fiber-optic

Which media uses patterns of microwaves to represent bits?

Copper Wireless Fiber-optic

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

Crossover Rollover Straight-Through

What protocol data unit (PDU) is received by the physical layer for encoding and transmission?

Frame Segment Packet

Which standards organization oversees development of wireless LAN standards?

IANA IEE ISO

Which of the following fiber-optic cable types can help data travel approximately 500 meters?

Multimode Single-Mode

Which of the following fiber-optic cable types can travel approximately 100 km?

Multimode Single-Mode

Which of the following fiber-optic cable types is used to connect long-distance telephony and cable TV applications?

Multimode Single-Mode

Which of the following fiber-optic cable types is used within a campus network?

Multimode Single-Mode

Which of the following fiber-optic cable types use lasers in a single stream as a data light source transmitter?

Multimode Single-Mode

Which of the following fiber-optic cable types use light emitting diodes (LEDs) as a data light source transmitter?

Multimode Single-Mode

Wireless Access Point (AP)

These concentrate the wireless signals from users and connect to the existing copper-based network infrastructure, such as Ethernet. Home and small business wireless routers integrate the functions of a router, switch, and access point into one device, as shown in the figure.

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 They increase the speed at which they travel They allow for a full duplex connectivity

True or false? The physical layer is only concerned with wired network connections.

True False- Wireless and wired connections

True or false? When a frame is encoded by the physical layer, all bits are sent over the media at the same time.

True False- the physical layer accepts a complete frame from the data link layer and encodes it as a series of signals

Which of the following wireless standards is best suited for industrial and IoT environments?

WiMax Wifi Bluetooth Zigbee-intended for applications that require short-range, low data-rates and long battery life. Zigbee is typically used for industrial and Internet of Things (IoT) environments such as wireless light switches and medical device data collection.

Which of the following wireless standards is used for Personal Area Networks (PANs) and allows devices to communicate over distances of 1 to 100 meters? You got it!

Wifi Bluetooth

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

console rollover straight through crossover

What is the purpose of the OSI physical layer?

controlling access to media transmitting bits across the local media

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

proper grounding connections twisting opposing circuit wire pairs together wrapping the bundle of wires with metallic shielding

Which characteristic describes crosstalk?

the distortion of the network through fluorescent lighting the distortion of the transmitted messages from signals carried in adjacent wires

What is indicated by the term throughput?

the guaranteed data transfer rate offered by ISP the measure of the bits transferred across the media over a given period of time

What is the definition of bandwidth?

the speed at which bits travel on a network the amount of data that can flow from one place to another in a given amount of time

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

It is usually cheaper than copper cabling It's easier to install It is able to carry signals much further than copper cable

Which statement correctly describes frame encoding?

It uses the characteristics of one wave to modify another wave It converts bits into predefined code in order to provide predictable a pattern to help distinguish data bits from control bits

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?

Physical Layer Data Link Layer Presentation Layer

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 needs mobility when connecting to the network The end user device only has ethernet NIC

True or false. Wireless LANs operate in full-duplex allowing all devices to send or receive data at the same time so the number of users does not impact performance.

True False-WLANs operate in half-duplex, which means only one device can send or receive at a time.

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 microwave oven the large number of trees that surround the office