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WorksheetsUnits 10, 11, 12 Revision Quizzizz
Total questions: 101
Worksheet time: 52mins
How does the BitTorrent protocol facilitate file sharing among peers?
By storing files on a central server
By distributing file chunks among peers
By encrypting files for secure transfer
What distinguishes the function of a router in packet switching from circuit switching networks?
Routers in packet switching networks prioritize voice traffic
Routers in packet switching networks forward data packets based on destination address
Routers in circuit switching networks encrypt all transmitted data
What is a key characteristic of packet switching that allows for more efficient data transmission?
Sequential data transmission
Dynamic allocation of network resources
Fixed communication paths
How does circuit switching differ from packet switching in terms of network resource utilization?
Circuit switching statically allocates resources for each call, while packet switching dynamically allocates resources
Circuit switching dynamically allocates resources for each call, while packet switching statically allocates resources
Both circuit switching and packet switching allocate resources dynamically
How does the OS handle input/output operations?
By bypassing the CPU for all I/O operations
By managing all I/O operations initiated by the user
By limiting access to I/O devices
How does the OS manage memory resources?
By allowing unlimited memory access to all applications
By allocating memory to programs and protecting processes from overwriting each other
By restricting memory access to the OS only
How does the user interface of an operating system hide hardware complexities from users?
By displaying detailed hardware specifications
By simplifying interactions with hardware components
By requiring users to directly interact with hardware
Which protocol provides peer-to-peer file sharing?
HTTP
FTP
BitTorrent
What is the function of a router in packet switching?
To convert analog signals to digital signals
To forward data packets between networks
To encrypt data for secure transmission
What are the main purposes of an operating system?
To maximize resource usage
To minimize resource usage
To provide entertainment to users
What are the different process states in process management?
Running, sleeping, waiting
Running, ready, blocked
Active, inactive, paused
What is the purpose of resource management in the CPU?
To limit CPU utilization
To maximize CPU time and resources
To restrict access to CPU resources
What is the purpose of the Transport layer in the TCP/IP protocol suite?
To define the physical characteristics of the network
To ensure reliable data delivery between hosts
To format data for presentation to the user
What are the two main transmission modes discussed in this unit?
Circuit switching and Packet switching
Frequency switching and Time switching
Analog switching and Digital switching
What are the responsibilities of memory management in an OS?
To waste memory resources
To manage primary and secondary memory, load processes, and protect processes from overwriting
To limit memory access to specific applications
What are the benefits of using protocols in computer communication?
Ensuring data privacy
Facilitating communication between different devices and systems
Increasing network speed
How does packet switching differ from circuit switching?
Packet switching establishes a dedicated communication path, while circuit switching does not
Packet switching breaks data into packets for transmission, while circuit switching maintains a continuous connection
Packet switching is faster than circuit switching for voice communication
Which layer of the TCP/IP protocol suite is used when a message is sent from one host to another on the Internet?
Application layer
Transport layer
Link layer
What are the learning objectives related to circuit switching, packet switching, and routers?
Understanding of email protocols
Understanding of network security
Understanding of the benefits and drawbacks of circuit switching and packet switching
How does segmentation differ from paging in memory management?
Segmentation creates fixed-size partitions, while paging creates variable-size partitions
Segmentation involves dividing memory into variable-sized segments, while paging divides memory into fixed-size blocks
Segmentation and paging are identical concepts
How does multitasking benefit from different scheduling routines?
By slowing down the system
By improving system responsiveness and efficiency
By increasing resource wastage
What is the main purpose of the kernel in an operating system?
To complicate interactions between applications and hardware
To perform basic functions of the OS and bridge between applications and hardware
To limit access to system resources
How does the kernel of an operating system act as an interrupt handler?
By ignoring interrupts
By processing interrupts and managing low-level scheduling
By delegating interrupt handling to user applications
What is the function of different scheduling routines in process management?
To complicate the process scheduling
To simplify the process scheduling
To optimize the process scheduling
What is the role of the BIOS in the boot process?
Responsible for executing applications
Initializing hardware components and loading the OS
Managing user interfaces
What is disk thrashing and how does it occur?
Disk optimization technique
Excessive swapping of pages between memory and disk
Disk encryption process
What are the concepts of paging, virtual memory, and segmentation in memory management?
Paging, caching, buffering
Paging, swapping, fragmentation
Paging, virtual memory, segmentation
What is the main function of an operating system?
To complicate user interactions with hardware
To manage hardware resources and provide an interface between users and the machine
To limit access to hardware resources
How can pages be replaced in a paging system?
By duplicating pages
By swapping out less frequently used pages
By increasing the page size
What is the difference between paging and segmentation in memory management?
Paging divides memory into fixed-size blocks, while segmentation divides memory into variable-sized segments
Paging and segmentation are the same concepts
Paging is used for virtual memory, while segmentation is used for physical memory
Which layer of the TCP/IP protocol suite is responsible for routing packets between networks?
Application layer
Internet layer
Transport layer
What are the techniques used by OS for memory management?
Single allocation, disk merging, and segmented memory
Single allocation, disk partitioning, and paged memory
Single allocation, disk formatting, and virtual memory
What are the key terms associated with encryption?
Plain text, cipher text, decryption
Public key, private key, symmetric encryption
Authentication, authorization, integrity
Which protocol is commonly used for retrieving email from a mail server?
HTTP
FTP
POP3
Which protocol in the TCP/IP suite is commonly used for sending emails between servers?
HTTP
SMTP
FTP
What is the primary function of a router in packet switching networks?
Encrypting data packets for secure transmission
Determining the best path for data packets based on destination address
Filtering out spam emails from incoming traffic
What is the main drawback of circuit switching?
Inefficient use of network resources
High latency
Vulnerability to packet loss
What is the significance of the TCP/IP protocol suite in computer networking?
It ensures physical connectivity between devices
It provides a standardized framework for communication
It encrypts all data transmitted over the network
Which layer of the TCP/IP protocol suite is responsible for providing application services to users?
Transport layer
Application layer
Internet layer
Which protocol in the TCP/IP suite is commonly used for sending emails between servers?
HTTP
SMTP
FTP
How does circuit switching differ from packet switching in terms of resource allocation?
Circuit switching dynamically allocates resources for each call, while packet switching does not
Packet switching statically allocates resources for each call, while circuit switching does not
Both circuit switching and packet switching allocate resources dynamically
In the TCP/IP protocol suite, which layer is responsible for ensuring reliable data delivery between hosts?
Application layer
Transport layer
Link layer
What is the primary function of a router in a network?
Filtering spam emails
Forwarding data packets between networks
Encrypting data for secure transmission
How does packet switching contribute to efficient data transmission?
By establishing dedicated communication paths
By breaking data into packets for parallel transmission
By prioritizing voice traffic over data traffic
How does circuit switching differ from packet switching in terms of data transmission?
Circuit switching transmits data in parallel, while packet switching transmits data sequentially
Circuit switching maintains a continuous connection, while packet switching breaks data into packets for transmission
Circuit switching uses routers to establish paths, while packet switching uses dedicated channels
How can protocol implementation be viewed in terms of a stack?
Each layer of the stack performs the same function
Each layer of the stack has its own functionality
The stack only consists of two layers
What is the primary purpose of the Transport layer in the TCP/IP protocol suite?
To format data for presentation to the user
To ensure reliable data delivery between hosts
To define the physical characteristics of the network
In the TCP/IP protocol suite, which layer is responsible for defining the physical and data link layers of the network?
Application layer
Internet layer
Link layer
How does BitTorrent protocol facilitate file sharing?
By storing files on a central server
By distributing file chunks among peers
By encrypting files for secure transfer
What is the main advantage of using packet switching over circuit switching for data transmission?
Lower latency in data transfer
More efficient use of available network capacity
Higher security for transmitted data
What is the definition of encryption?
The process of encoding messages or information in a way that only authorized parties can read it.
The process of compressing data for secure transmission.
The process of decrypting messages for secure communication.
What is the role of the Link layer in the TCP/IP protocol suite?
Ensuring end-to-end communication between hosts
Defining the physical and data link layers of the network
Providing application services to users
How does the OS maximize the use of computer resources?
By minimizing the utilization of CPU resources
By optimizing the use of memory, CPU, and I/O devices
By restricting access to memory
A website has a digital certificate issued by a Certificate Authority (CA). The session key generated for the SSL session between a browser and the server hosting the website is encrypted using ___________ .
A) The CA’s public key.
B) The CA’s private key.
C) The public key that comes with the digital
certificate.
D) The CA’s public key.
Which of the following is not contained in a digital certificate?
A) Public key.
B) Session key.
C) Validity period.
D) Hash algorithm.
In verifying that a digital certificate is from a Certificate Authority (CA), which of the following information is being compared?
A) CA’s public key.
B) CA’s private key.
C) Message digest of the digital certificate.
D) Public key on the digital certificate.
What does SSL stand for?
Secure Socket Layer
Special Security License
Secure Space Layer
Straight Socket Loop
In asymmetric encryption process. Each communicating party starts with how many keys?
5
4
3
2
If Bob wants to send a encrypted message to Alice, which key does he use?
Bob private key
Bob public key
Alice public key
Alice private key
If Bob receives Alice’s public key from a public directory, how does he know the key really came from Alice?
From acknowledgement from Alice
From a trusted certificate authority
From your browser database
From Alice server
A certificate authority (CA) is a trusted authority that certifies who is the owner of the public key (individual or organization) by issuing something called digital certificates.
True
False
The CA digitally signs each certificate using its private key.
True
False
•Hyper Text Transfer Protocol Secure (HTTPS) is the secure version of HTTP.
True
False
Who really checks the validity of a Digital certificate?
The user
The Browser
The server
The web application
The study and use of techniques for securing communication.
cryptography
decryption
substitution cypher
ciphertext
A check to make sure that a computer or user is who/what it says it is.
certificate authority
authenticate
SSL certificate
certificate authority
What is asymmetric encryption?
A type of encryption that is extremely easy to break
A type of encryption using only one key to encrypt and decrypt data
A type of encryption that is no longer used in modern technology
A type of encryption using a pair of keys (public and private) to encrypt and decrypt data
What is a digital certificate and how is it used in the context of security?
It is a form of encryption used to hide sensitive information
It is a type of physical key used to unlock digital files
It is a secure software program that protects against computer hacking
It is a digital document that verifies the identity of a website or individual and is used to establish secure connections and authenticate identities.
What is quantum cryptography?
A type of ancient encryption using hieroglyphics
A method of communication using Morse code
A form of cryptography based on astrology
A method of secure communication using quantum mechanics
Describe the process of obtaining a digital certificate and its role in ensuring secure communication.
The process involves generating a public and private key pair, submitting a CSR to a certificate authority, and receiving the digital certificate after verification. Its role is to provide authentication, encryption, and data integrity for secure communication.
The process involves creating a public and private key pair, and its role is to block unauthorized access to the network.
The process involves creating a public key, submiting a CSR, and its role is to block unauthorized access to the network.
The process requires obtaining a certificate from the an authority, and its role is to provide proof of identity for online transactions.
Explain the concept of public key infrastructure (PKI) and its role in ensuring secure communication.
PKI is a type of encryption used to hide sensitive information
PKI is a system for managing digital certificates and public-private key pairs
PKI is a method of secure communication using Morse code
PKI is a form of cryptography based on astrology
1) avoids the need to utilise computer time during each TLS connection
2) TLS can establish either a new session or attempt to resume an existing session …
3) … the latter can save considerable computer time.
These are descriptions for......
handshake protocol
session caching
PKI
record protocol
Discuss the role of SSL/TLS protocols in securing online transactions and communication.
SSL/TLS protocols are used to make network communication less secure
SSL/TLS protocols are used to provide secure communication over a computer network
SSL/TLS protocols are used to enable VPN to work
SSL/TLS protocols are used to provide proof of identity for online transactions
1) permits website and client to authenticate each other and to make use of encryption
algorithms
2) secure session between client and website is established.
This describes....
Record Protocol
Handshake protocol
session caching
QKD
What do we call the pieces of information in a quantum computer?
Bits
Bytes
Qubits
Qubytes
What can quantum computers be used for? Select TWO.
Homework
Artificial Intelligence
Google Docs and Slides
Simulations/Predictions
Computer games
When physics is used instead of mathematics in a cipher process, it is called what?
Biometric cryptology
Physical cryptology
Quantum cryptology
Physical encryption
This type of encryption uses a single, pre-shared key to encrypt and decrypt data.
Asymmetric encryption
Symmetric encryption
Quantum encryption
Elliptical-curve encryption
What is the main security concern related to data transmission?
Interoperability
Availability
Confidentiality
Scalability
It is the TCP/IP layer responsible for translation, compression, and encryption.
Session
Transport
Application
ost-to-network
The passing of the data and network information down and back up through the layers of the receiving device is made possible by an _______ .
Protocol suite
service
interface
modularity
The number of layers the original TCP/IP protocol suite .
four
five
six
seven
______is protocol used by the Transport layer for connection -oriented
IP
UDP
TCP
NCP
A protocol used to receive email. With Email is saved on a server even after it is downloaded to a client.
Transmission Control Protocol (TCP)
Internet Message Access Protocol (IMAP)
Post Office Protocol 3 (POP3)
User Datagram Protocol (UDP)
A protocol used to receive email. Email is deleted from a server after it is downloaded to a client.
Simple Mail Transfer Protocol (SMTP)
Post Office Protocol 3 (POP3)
Internet Message Access Protocol (IMAP)
Domain Name System (DNS)
A protocol used to send email.
Internet Message Access Protocol (IMAP)
Hypertext Transfer Protocol Secure (HTTPS)
Simple Mail Transfer Protocol (SMTP)
Post Office Protocol 3 (POP3)
A protocol that combines HTTP with the Secure Sockets Layer (SSL) protocol to securely transfer web content between computers.
Hypertext Transfer Protocol Secure (HTTPS)
Simple Mail Transfer Protocol (SMTP)
Post Office Protocol 3 (POP3)
Internet Message Access Protocol (IMAP)
A protocol that helps internet users and network devices discover other devices using a human-readable hostname instead of numeric IP addresses.
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
Domain Name System (DNS)
Simple Mail Transfer Protocol (SMTP)
An important protocol in the internet protocol suite that enables two hosts to establish a connection and exchange data.
Internet Protocol (IP)
Domain Name System (DNS)
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
The principal communications protocol in the internet protocol suite that is used to route information over the Internet.
Internet Protocol (IP)
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
Domain Name System (DNS)
Which is NOT one of the application layer protocols?
HTTP
FTP
SMTP
IP
Paging is
contiguous memory allocation scheme
non contiguous memory allocation scheme
In paging physical memory is divided into partitions called--------
pages
frames
page table
Pages have
fixed and equal size
fixed and unequal size
variable and equal size
variable and unqual size
Page table stores the mapping between
pages and frames
process and PCB
frame and PCB
page and PCB
Round Robin
