Module 4
rollover
What type of cable is used to connect a workstation serial port to a Cisco router console port?
zigbee
What wireless standard is best suited for industrial and IoT environments?
bluetooth
What wireless standard is used for Personal Area Networks (PANs) and allows devices to communicate over distances of 1 to 100 meters?
the end-user device needs mobility when connecting to the network
A network administrator is designing a new network infrastructure that includes both wired and wireless connectivity. Under what situation would a wireless connection be recommended?
physical layer
A network administrator is troubleshooting connectivity issues on a server. Using a meter, 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?
the microwave
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?
bandwidth
The capacity of a medium to carry data is?
throughput
The measure of transfer of bits across the media is called what?
UTP
The most common network media?
data link
The physical layer of the receiving device passes bits up to which higher level layer?
STP
This counters EMI and RFI by using shielding techniques and special connectors?
False
True or false? The physical layer is only concerned with wired network connections?
False
True or false? When a frame is encoded by the physical layer, all bits are sent over the media at the same time?
false
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?
false
True or false? Wireless is not well suited for enterprise networks?
frame
What PDU is received by the physical layer for encoding and transmission?
coaxial
What attaches antennas to wireless devices? It can also be bundled with fiber-optic cabling for two-way data transmission?
the distortion of the transmitted messages from signals carried in adjacent wires
What characteristic describes crosstalk?
it converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits
What correctly describes frame encoding?
multimode
What fiber-optic cable type can help data travel approximately 500 meters?
single-mode
What fiber-optic cable type can travel approximately 100 km?
single-mode
What fiber-optic cable type is used to connect long-distance telephony and cable TV applications?
multimode
What fiber-optic cable type is used within a campus network?
single-mode
What fiber-optic cable type uses lasers in a single stream as a data light source transmitter?
cancellation
What is a characteristic of UTP cabling?
it is able to carry signals much further than copper cabling
What is an advantage of using fiber optic cabling rather than copper cabling?
the measure of the bits transferred across the media over a given period of time
What is indicated by the term throughput?
the amount of data that can flow from one place to another in a given amount of time
What is the definition of bandwidth?
transmitting bits across the local media
What is the purpose of the OSI physical layer?
copper
What media uses electrical pulses to represent bits?
fiber-optic
What media uses patterns of light to represent bits?
wireless
What media uses patterns of microwaves to represent bits?
twisting opposing circuit wire pairs together
What procedure is used to reduce the effect of crosstalk in copper cables?
multimode
Which of the following fiber-optic cable types use light emitting diodes (LEDs) as a data light source transmitter?
coaxial
Which of the following terminates with BNC, N type and F type connectors?
IEEE
Which standards organization oversees development of wireless LAN standards?
straight-through
Which type of UTP cable is used to connect a PC to a switch port?
they allow for full-duplex connectivity
Why are two strands of fiber used for a single fiber optic connection?