WorksheetsNetworking
Total questions: 114
Worksheet time: 1hrs 26mins
What is a computer network?
A group of interconnected computers and devices
A single computer system
A software application
A computer hardware component
Which of the following best defines a computer network?
A network of cables
A collection of viruses
A system of interconnected computers and devices
A group of unrelated computers
What is the primary purpose of a computer network?
To enhance security
To limit access to resources
To share resources and information
To isolate individual computers
Which of the following is NOT a benefit of computer networking?
Resource sharing
Increased communication
Decreased security
Centralized management
Which term refers to a network of computers and devices within a limited area?
LAN
WAN
MAN
PAN
What does a computer network allow users to do?
Decrease productivity
Increase isolation
Share resources and information
Limit access to data
The primary purpose of a school library is to share ............. and ............
(a)
A PAN is a network used for communication among devices in close (a) of a person.
What is the main purpose of a Local Area Network (LAN)?
To connect computers and devices over a large geographical area
To provide internet access to a single computer
To connect computers and devices within a limited area
To store large amounts of data
Which of the following best describes a Wide Area Network (WAN)?
A network of interconnected computers and devices within a limited area
A system of interconnected computers and devices
A network that covers a large geographical area
A group of unrelated computers
Which PDU is processed when a host computer is de-encapsulating a message at the transport layer of the TCP/IP model?
bits
frame
packet
segment
Which address does a NIC use when deciding whether to accept a frame?
(a)
What are the primary benefits of computer networking?
Decreased communication
Increased isolation
Resource sharing and enhanced communication
Limiting access to resources
(a) networks allow each host to act as both a client and a server.
The internet connects more than just desktop and laptop computers; it includes mobile devices and (a) .
A server in a company's network can both send and (a) messages.
RFID tags are primarily used to track or monitor (a) .
Which technology allows computers and devices to communicate wirelessly over short distances?
Bluetooth
USB
Wifi
networking
Which one of the following network devices is used to connect different networks?
(a)
Which one of the following network devices works on the network layer of an OSI model?
Hub
Router
Both
None of the above
What network infrastructure implementation links multiple buildings within the same city?
(a)
What term is used to describe a topology in which two nodes share a single link?
(a)
Which one of the following network devices stores the IP addresses?
None of the above
Both
Switch
Router
What is the main advantage of the star network topology?
Low cost
Easy fault identification
Simple to set up
High resilience
In which network topology are nodes connected in a closed-loop configuration?
Star
Bus
Ring
Mesh
Which network device translates data between networks using different protocols?
Hub
Switch
Router
Repeater
Which one of the following divides the larger networks into smaller networks or smaller sections?
Gateway
Repeater
Hub
Bridge
Which network device connects multiple LANs together and separates network segments?
Router
Bridge
Switch
Hub
What is the main advantage of a mesh network topology?
Low cost
Simple configuration
High resilience
Limited coverage
In the bus network topology, every node is connected in series along a single (a) .
In the ring network topology, the nodes are connected in a closed-loop configuration, and some rings pass data in (a) direction(s) only.
An access point is a device that sends and receives data wirelessly over radio frequencies, using 2.4GHz or (a) GHz bands.
(a) Increases a signal's strength so it can travel greater distances without a loss in quality.
A bridge can be used in computer networks to interconnect two LANs together and separate (a) segments.
(a) Converts signals between analog and digital formats, facilitating network
In a point-to-point topology, a direct link exists between (a) devices.
(a) Joins multiple devices on the same LAN and broadcasts messages received from one port to all other ports.
An ad hoc wireless network does not rely on any cables, routers, servers, or wireless access points and operates in a simple (a) network.
(a) Improved network technology that addresses issues of data collisions and maximizes LAN bandwidth.
(a) Enables clients to connect to a wireless LAN using radio frequencies.
(a) Connects discrete networks or systems using different protocols, facilitating data flow between them.
In the realm of computer networking, understanding network topologies is fundamental to designing and managing efficient communication structures. Network topology refers to the physical and logical arrangement of nodes and connections within a network. It dictates how data flows between devices and influences factors like reliability, scalability, and fault tolerance.
There are several key network topologies worth exploring. The bus network topology involves nodes connected along a single cable, primarily found in cable broadband networks. Contrastingly, the star network topology features a central hub linking all nodes, although it suffers from single points of failure. The ring network topology forms a closed-loop configuration, facilitating unidirectional or bidirectional data transmission. Meanwhile, the mesh network topology offers multiple paths between nodes, enhancing resilience but incurring higher costs.
Beyond these conventional topologies, hybrid configurations blend different topologies to optimize network performance. For instance, the tree network topology hierarchically organizes nodes, resembling a star configuration at each tier. Wireless networks introduce unique topologies like the infrastructure and ad hoc topologies, offering flexibility and mobility at the expense of coverage and reliability.
In addition to understanding topologies, knowledge of network devices is crucial. Devices like hubs, bridges, switches, routers, access points, gateways, modems, and repeaters play pivotal roles in data transmission, each serving distinct functions within the network architecture.
Comprehending network topologies and devices empowers network administrators to design robust infrastructures, troubleshoot issues effectively, and ensure seamless connectivity across diverse environments.
Network topology refers to the ........... and ..........arrangement of nodes and connections within a network.
(a)
In a bus network topology, nodes are connected along a (a) cable.
The star network topology features a central (a) linking all nodes
In addition to understanding topologies, knowledge of network devices is crucial. Devices like hubs, bridges, switches, routers, access points, gateways, modems, and repeaters play pivotal roles in (a)
Beyond these conventional topologies, (a) configurations blend different topologies to optimize network performance
Wireless networks introduce unique topologies like the infrastructure and ad hoc topologies, offering flexibility and mobility at the expense of (a)
Which organization is responsible for testing wireless LAN devices from different manufacturers?
Wi-Fi Alliance
FCC
IEEE
ITU
Which cable type is commonly used in LAN connections and consists of four pairs of twisted wires?
Coaxial cable
Fiber-optic cable
Category 5e cable
Powerline cable
What organization is responsible for creating wireless technical standards such as IEEE 802.11?
IEEE
FCC
ITU
Wi-Fi Alliance
What technology uses the 2.4 GHz band and is limited to low-speed, short-range communications?
IEEE 802.11
Bluetooth
Coaxial
Fiber-optic
What is the purpose of SSID in a wireless network?
a) b)
c) d)
Identifies a specific wireless network
Determines the type of technology used
Manages data flow within the network
Prevents unauthorized access
Which wireless frequency band is commonly used for LANs and is collectively referred to as Wi-Fi?
(a)
What is the primary function of a hub in a LAN?
Forwards data packets between computer networks
Broadcasts messages from one port to all other ports
Connects multiple LANs together
Filters and forwards data based on MAC addresses
What type of cable has an inner wire surrounded by a conducting shield and an external insulating sheath?
Coaxial cable
Powerline cable
Category 5e cable
Fiber-optic cable
Which cable type is made up of glass or plastic and can carry digital information at very high speeds over long distances?
(a)
The unique identifier embedded on an Ethernet NIC is known as the (a) address.
Answer:
Wireless routers usually broadcast their configured SSIDs by default to allow other devices to automatically discover the name of the (a) network.
When the SSID broadcast is disabled, wireless devices must (a) enter the SSID on wireless devices.
Fiber-optic cables have a very high (a) , allowing them to carry very large amounts of data.
The OSI Model is like a blueprint that explains how computers talk to each other over the internet. It's kind of like how different parts of a car work together to make it move. Each part has its own job, and if they all work well, the car goes forward smoothly.
The OSI Model is split into seven layers, and each layer does a specific task to help computers share information. Just as you can fix or change parts of a car without stopping it from running, the OSI Model lets us fix or upgrade parts of computer networks without stopping them from working.
Understanding the OSI Model helps us see how computer networks are set up and how they keep working even if something goes wrong. It's like knowing how a car works under the hood helps you drive it better and fix problems when they come up.
The (a) serves as a fundamental framework that delineates the intricate process of computer-to-computer communication.
Understanding the OSI Model helps us see how computer networks are set up and how they keep working even if (a)
the OSI Model lets us (a) parts of computer networks without stopping them from working.
How many layers does the OSI Model have?
(a)
Which of the following analogies best describes the OSI Model?
A puzzle with seven pieces
A car with seven wheels
A set of seven keys on a keyboard
A car composed of independent functions working together
What is the primary responsibility of the Physical layer in the OSI model?
Handling data encryption
Managing network protocols
Transferring bits
Controlling data flow
Which physical mediums can be considered part of Layer 1 in the OSI model?
Only Ethernet cables
Only Serial cables
Only tangible mediums
Ethernet cables, Serial cables, and WiFi
Why is WiFi considered a Layer 1 protocol despite its lack of physical presence?
Because it operates using radio waves
Because it only carries 1's between nodes
Because it is directly connected to nodes
Because it relies on tangible mediums
How are bits transferred in the case of Fiber optics?
In the form of pulses of light
In the form of magnetic fields
In the form of radio waves
In the form of electric pulses
What distinguishes the format of data on the wire in different physical mediums?
The characteristics of the medium itself
The form of electric pulses
The speed of data transmission
The type of encryption used
How does the Physical layer contribute to computer-to-computer communication?
By transferring bits over a physical medium
By routing data packets
By managing network traffic
By encrypting data packets
What is the purpose of using Repeaters in large WiFi deployments?
To increase data speed
To secure the network
To extend the signal range
To reduce network latency
What is the primary function of the Data Link layer in the OSI model?
Interfacing with the Physical layer
Managing network security
Delivering packets from one NIC to another
Routing packets
Which device operates at the Data Link layer and facilitates communication within networks?
Router
Switch
Hub
Modem
What is the purpose of the Media Access Control (MAC) address?
Filtering network traffic
Identifying network protocols
Uniquely identifying each NIC
Managing network bandwidth
The Data Link layer is responsible for interfacing with the (a) layer.
What is the main responsibility of the OSI Layer 3?
Packet delivery from end to end
Putting 1’s and 0’s on the wire
Facilitating communication within networks
Interfacing with the Physical layer
What encapsulates data in a IP header at Layer 3?
MAC address
Source and Destination IP addresses
Source and Destination MAC addresses
Data Link layer
What is the primary function of a Switch?
Facilitating communication within networks
Creating a boundary between networks
Repeating a signal from one medium to the other
Grouping 1’s and 0’s into chunks
What is the distinction between Layer 2 and Layer 3 addressing schemes?
Both use MAC addresses
Both use IP addresses
Layer 2 uses MAC addresses; Layer 3 uses IP addresses
Layer 2 uses IP addresses; Layer 3 uses MAC addresses
What does Layer 2 deliver packets from?
Wire to wire
End to end
Hop to hop
NIC to NIC
What does the Network Interface Card (NIC) handle at Layer 2?
Receiving and transmitting signals
Putting 1’s and 0’s on the wire
Grouping 1’s and 0’s into chunks
Facilitating communication within networks
What does the Data Link layer group together?
Bits
Frames
Packets
Bytes
How do TCP and UDP protocols contribute to efficient data transmission?
By ensuring reliable data delivery
By optimizing packet routing
By minimizing network latency
By providing encryption mechanisms
What distinguishes Port Numbers from MAC addresses?
MAC addresses ensure end-to-end delivery
Port Numbers identify network streams
MAC addresses are used for logical identification
Port Numbers identify network devices
What distinguishes Layer 4 from Layer 3 in the OSI model?
Layer 4 manages service to service delivery
Layer 3 routes data between networks
Layer 3 distinguishes network streams
Layer 4 provides end-to-end delivery
Which protocol is preferred for real-time applications like online gaming?
(a)
What distinguishes UDP from TCP regarding reliability?
TCP guarantees data delivery
UDP ensures connection-oriented communication
TCP offers faster transmission
UDP includes flow control mechanisms
What distinguishes TCP and UDP in terms of data transmission?
TCP provides faster transmission
UDP ensures data integrity
TCP offers connectionless communication
UDP is more suitable for real-time applications
What distinguishes TCP from UDP in terms of reliability?
A) B)
C) D)
TCP is connection-oriented
UDP guarantees data delivery
TCP includes error checking
UDP provides flow control
What distinguishes UDP from TCP?
UDP provides reliable communication
TCP is connectionless
UDP offers faster transmission
TCP uses Port Numbers
What addressing scheme does the Transport layer use to identify network streams?
DNS addresses
Port Numbers
MAC addresses
IP addresses
What is the purpose of Transmission Control Protocol (TCP)?
Provides fast but unreliable communication
Provides reliable, connection-oriented communication
Requires minimal overhead for data transmission
Used primarily for real-time applications
Which layer of the OSI model is responsible for service to service delivery?
(a)
How many port numbers does each of the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) have?
(a)
Comprehension Note: OSI Layers 5, 6, and 7
The OSI model helps us understand how computer networks function, breaking down the process into seven layers. Layers 5, 6, and 7—known as Session, Presentation, and Application—are like the final chapters in a book. They handle the last steps before the information sent through the network is shown to people.
In simpler terms, these layers are like the finishing touches before you see something on your device. Even though they might not seem super important for how networks work, they become more meaningful if you're into software engineering. For now, we won't get too deep into the technical stuff, but just remember, these layers help make sure the things you see on your computer or phone work the way they should!
What comparison is made between OSI Layers 5, 6, and 7 and a book?
(a)
What occurs when data is received at the destination end?
(a)
What is the purpose of decapsulation?
To convert data into binary format
To transmit data across layers
To add headers to the data
To remove headers from the data
What is the primary function of Layer 2 in encapsulation?
Adding TCP header
Removing headers
Adding IP header
Adding Ethernet header
Which process prepares data for transmission across the network?
(a)
Which layer adds an Ethernet header?
(a)
What is decapsulation?
Data conversion into binary format
Addition of headers at each layer
Removal of headers at each layer
Data transmission across layers
Which layer is responsible for adding an IP header?
(a)
A company is contemplating whether to use a client/server or a peer-to-peer network. What are three characteristics of a peer-to-peer network?
(Choose three.)
better security
easy to create
better device performance when acting as both client and server
lacks centralized administration
less cost to implement
What two criteria are used to help select a network medium from various network media? (Choose two.)
the types of data that need to be prioritized
the cost of the end devices utilized in the network
the distance the selected medium can successfully carry a signal
the number of intermediary devices installed in the network
the environment where the selected medium is to be installed
Which area of the network would a college IT staff most likely have to redesign as a direct result of many students bringing their own tablets and smartphones to school to access school resources?
extranet
intranet
wired LAN
wireless LAN
wireless WAN
An employee at a branch office is creating a quote for a customer. In order to do this, the employee needs to access confidential pricing information from internal servers at the Head Office. What type of network would the employee access?
an intranet
the Internet
an extranet
a local area network
Which two connection options provide an always-on, high-bandwidth Internet connection to computers in a home office? (Choose two.)
cellular
DSL
satellite
cable
dial-up telephone
Which two Internet connection options do not require that physical cables be run to the building? (Choose two.)
DSL
cellular
satellite
dialup
dedicated leased line
What are two characteristics of a scalable network? (Choose two.)
easily overloaded with increased traffic
grows in size without impacting existing users
is not as reliable as a small network
suitable for modular devices that allow for expansion
offers limited number of applications
Which two statements about the relationship between LANs and WANs are true? (Choose two.)
Both LANs and WANs connect end devices.
WANs connect LANs at slower speed bandwidth than LANs connect their internal end devices.
LANs connect multiple WANs together.
WANs must be publicly-owned, but LANs can be owned by either public or private entities.
WANs are typically operated through multiple ISPs, but LANs are typically operated by single organizations or individuals.
In your opinion (this has no bearing on your grade), please rate your motivation to do well in this course:
Not At All Motivated
Slightly Motivated
Motivated
Very Motivated
Completely Motivated
At which layer of the OSI model would a logical address be encapsulated?
(a)
Which PDU format is used when bits are received from the network medium by the NIC of a host?
file
frame
packet
segment
A computer in a given network is communicating with a specific group of computers. What type of communication is this?
(a)
Which IEEE standard enables a wireless NIC to connect to a wireless AP that is made by a different manufacturer?
802.1
802.11
802.3
802.2
A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this requirement?
(a)
Which wireless security procedure should be used to hide the WLAN ID from wireless clients?
Decrease the antenna spectrum on each wireless client.
Disable the broadcast of the SSID on the access point.
Configure MAC address filtering on the access point.
Configure WEP only on the access point.
. 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 will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
It will discard the frame.
It will forward the frame to the next host.
It will remove the frame from the media.
It will strip off the data-link frame to check the destination IP address
A small car dealership has a scanner that is attached to the PC of the sales manager. When salesmen need to scan a document, they place the document in the scanner and use their own PCs to control the scanner through software on the PC of the manager. After the document is scanned, they can attach it to an email or upload it into the sales software. What type of network model does this scenario describe?
client/server
packet-switched
peer-to-peer
centralized
