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WorksheetsСеть 2
Total questions: 39
Worksheet time: 7hrs 30mins
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?
Presentation layer
Network layer
Physical layer
Data link layer
What type of cable is used to connect a workstation serial port to a Cisco router console port?
Crossover
Rollover
Straight-through
Coaxial
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?
Requiring proper grounding connections
Twisting opposing circuit wire pairs together
Wrapping the bundle of wires with metallic shielding
Designing a cable infrastructure to avoid crosstalk interference
Avoiding sharp bends during installation
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
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
The elevated location where the wireless LAN was installed
The number of wireless devices that are used in the wireless LAN
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 network signal from fluorescent lighting
The distortion of the transmitted messages from signals carried in adjacent wires
The weakening of the network signal over long cable lengths
The loss of wireless signal over excessive distance from the access point
What is indicated by the term throughput?
The guaranteed data transfer rate offered by an ISP
The capacity of a particular medium to carry data
The measure of the usable data transferred across the media
The measure of the bits transferred across the media over a given period of time
The time it takes for a message to get from sender to receiver
Which standards organization oversees development of wireless LAN standards?
IANA
IEEE
ISO
TIA
What is the binary representation for the decimal number 173?
10100111
10100101
10101101
10110101
Given the binary address of 11101100 00010001 00001100 00001010, which address does this represent in dotted decimal format?
234.17.10.9
234.16.12.10
236.17.12.6
236.17.12.10
How many binary bits exist within an IPv6 address?
32
48
64
128
256
What is the binary equivalent of the decimal number 232?
11101000
11000110
10011000
11110010
Which IPv4 address format was created for ease of use by people and is expressed as 201.192.1.14?
Binary
Dotted decimal
Hexadecimal
ASCII
What is the dotted decimal representation of the IPv4 address 11001011.00000000.01110001.11010011?
192.0.2.199
198.51.100.201
203.0.113.211
209.165.201.223
What is the decimal equivalent of the binary number 10010101?
149
157
168
192
What is the decimal equivalent of the hex number 0x3F?
63
77
87
93
What is the dotted decimal representation of the IPv4 address which is represented as the binary string 00001010.01100100.00010101.00000001?
10.100.21.1
10.10.20.1
100.10.11.1
100.21.10.1
What is the decimal equivalent of 0xC9?
185
200
201
199
Which is a valid hexadecimal number?
F
G
H
J
What is the binary representation of 0xCA?
10111010
11010101
11001010
11011010
How many bits are in an IPv4 address?
32
64
128
256
What identifier is used at the data link layer to uniquely identify an Ethernet device?
IP address
MAC address
Sequence number
TCP port number
What attribute of a NIC would place it at the data link layer of the OSI model?
Attached Ethernet cable
IP address
MAC address
RJ-45 port
TCP/IP protocol stack
What is true concerning physical and logical topologies?
The logical topology is always the same as the physical topology.
Physical topologies are concerned with how a network transfers frames.
Physical topologies display the IP addressing scheme of each network.
Logical topologies refer to how a network transfers data between devices.
What method is used to manage contention-based access on a wireless network?
CSMA/CD
Priority ordering
CSMA/CA
Token passing
A technician has been asked to develop a physical topology for a network that provides a high level of redundancy. Which physical topology requires that every node is attached to every other node on the network?
Bus
Hierarchical
Mesh
Ring
Star
Which statement describes the half-duplex mode of data transmission?
Data that is transmitted over the network can only flow in one direction.
Data that is transmitted over the network flows in one direction at a time.
Data that is transmitted over the network flows in one direction to many different destinations simultaneously.
Data that is transmitted over the network flows in both directions at the same time.
Which is a function of the Logical Link Control (LLC) sublayer?
To define the media access processes that are performed by the hardware
To provide data link layer addressing
To identify which network layer protocol is being used
To accept segments and package them into data units that are called packets
Which data link layer media access control method does Ethernet use with legacy Ethernet hubs?
Token passing
Turn taking
Determinism
CSMA/CD
Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?
Application
Transport
Data link
Physical
What type of physical topology can be created by connecting all Ethernet cables to a central device?
Bus
Ring
Star
Mesh
Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?
The virtually unlimited availability of IPv6 addresses
The use of CSMA/CA
The use of full-duplex capable Layer 2 switches
The development of half-duplex switch operation
The use of Gigabit Ethernet speeds
