[100+]Computer Network mcq for bpsc computer teacher 2023

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Question: What is the purpose of a network in computing?
- A) To play video games
- B) To share resources and information
- C) To make phone calls
- D) To watch movies online
- Answer: B) To share resources and information
Question: Which device is used to connect different networks together?
- A) Hub
- B) Router
- C) Switch
- D) Modem Answer: B) Router
Question: What does TCP stand for in the context of networking?
- A) Transmission Control Protocol
- B) Technical Control Procedure
- C) Time Configuration Protocol
- D) Transfer Control Process
- Answer: A) Transmission Control Protocol
Question: Which layer of the OSI model is responsible for logical addressing?
- A) Physical Layer
- B) Data Link Layer
- C) Network Layer
- D) Transport Layer
- Answer: C) Network Layer
Question: What is the function of ARP in networking?
- A) Address Resolution Protocol
- B) Advanced Routing Protocol
- C) Automated Resource Provisioning
- D) Application Registration Process
- Answer: A) Address Resolution Protocol
Question: Which topology connects each network device to a central hub?
- A) Bus
- B) Star
- C) Ring
- D) Mesh Answer: B) Star
Question: In networking, what does the acronym LAN stand for?
- A) Long Area Network
- B) Local Area Network
- C) Large Access Network
- D) Link Administration Node
- Answer: B) Local Area Network
Question: Which protocol is used for secure communication over a computer network?
- A) FTP
- B) HTTP
- C) SSL/TLS
- D) DHCP
- Answer: C) SSL/TLS
Question: What is the primary purpose of a firewall in a network?
- A) To prevent physical damage to the network
- B) To block unauthorized access and control data traffic
- C) To boost network speed
- D) To enhance wireless connectivity
- Answer: B) To block unauthorized access and control data traffic
Question: Which of the following is a connectionless protocol?
- B) UDP
- C) IP
- D) HTTP
- Answer: B) UDP
Question: What is the role of a DNS server in networking?
- A) Data Naming System
- B) Domain Network Service
- C) Dynamic Network Server
- D) Domain Name System
- Answer: D) Domain Name System
Question: Which device operates at the Data Link Layer of the OSI model?
- A) Router
- B) Switch
- C) Hub
- D) Repeater
- Answer: B) Switch
Question: What is the purpose of DHCP in a network?
- A) Dynamic Host Configuration Protocol
- B) Domain Host Control Process
- C) Direct Hub Connection Protocol
- D) Digital Host Configuration Port
- Answer: A) Dynamic Host Configuration Protocol
Question: Which type of cable is commonly used for wired LAN connections?
- A) HDMI
- B) USB
- C) Ethernet
- D) VGA
- Answer: C) Ethernet
Question: What does the acronym WAN stand for in networking?
- A) Wireless Area Network
- B) Wide Area Network
- C) Wired Access Network
- D) Web Application Node
- Answer: B) Wide Area Network
Question: Which of the following is a private IP address?
- A) 192.168.1.1
- B) 203.56.78.90
- C) 172.31.45.67
- D) 209.128.56.34
- Answer: A) 192.168.1.1
Question: What is the purpose of NAT (Network Address Translation)?
- A) To translate domain names to IP addresses
- B) To translate private IP addresses to public IP addresses
- C) To encrypt network traffic
- D) To enhance network speed
- Answer: B) To translate private IP addresses to public IP addresses
Question: Which protocol is used for sending email?
- A) FTP
- B) SMTP
- C) HTTP
- D) SNMP
- Answer: B) SMTP
Question: What is the function of a proxy server in a network?
- A) To act as a barrier between a private network and the internet
- B) To manage network traffic
- C) To provide centralized authentication
- D) All of the above
- Answer: D) All of the above
Question: What is the purpose of the OSI model?
- A) To standardize network protocols
- B) To regulate internet speed
- C) To control data encryption
- D) To manage hardware components
- Answer: A) To standardize network protocols
Question: Which wireless communication standard is commonly used for home networks?
- A) 3G
- B) 4G
- C) Wi-Fi
- D) Bluetooth
- Answer: C) Wi-Fi
Question: What is a MAC address used for in networking?
- A) To identify a device on a network
- B) To establish a secure connection
- C) To manage internet speed
- D) To encrypt data packets
- Answer: A) To identify a device on a network
Question: Which layer of the OSI model is responsible for error detection and correction?
- A) Physical Layer
- B) Data Link Layer
- C) Transport Layer
- D) Application Layer
- Answer: C) Transport Layer
Question: What is the purpose of ICMP in networking?
- A) Internet Control Message Protocol
- B) Internet Communication Management Process
- C) International Connection Monitoring Protocol
- D) Internet Configuration and Management Process
- Answer: A) Internet Control Message Protocol
Question: Which protocol is used for secure file transfer over a network?
- A) FTP
- B) SFTP
- C) HTTP
- D) SNMP
- Answer: B) SFTP
Question: What is the function of a subnet mask in networking?
- A) To identify the network portion of an IP address
- B) To encrypt data traffic
- C)To assign IP addresses to devices
- D) To manage DNS servers
- Answer: A) To identify the network portion of an IP address
Question: Which of the following is a top-level domain (TLD)?
- A) .com
- B) www
- C) ftp
- D) net
- Answer: A) .com
Question: What is the purpose of a VLAN (Virtual Local Area Network)?
- A) To connect geographically dispersed networks
- B) To create multiple broadcast domains within a single physical network
- C) To regulate internet speed
- D) To enhance wireless connectivity
- Answer: B) To create multiple broadcast domains within a single physical network
Question: Which protocol is used for retrieving emails from a server to a client?
- A) POP3
- B) IMAP
- C) SMTP
- D) HTTP
- Answer: A) POP3
Question: What is the purpose of a default gateway in a network?
- A) To provide internet access to devices on the network
- B) To connect different networks
- C) To assign IP addresses to devices
- D) To manage network security
- Answer: B) To connect different networks
Question: Which protocol is used for dynamic IP address allocation?
- A) DHCP
- B) DNS
- C) SNMP
- D) HTTP
- Answer: A) DHCP
Question: What is the primary function of a switch in a network?
- A) To connect different networks
- B) To broadcast data to all devices on a network
- C) To filter and forward data based on MAC addresses
- D) To provide wireless connectivity
- Answer: C) To filter and forward data based on MAC addresses
Question: What is the purpose of QoS (Quality of Service) in networking?
- A) To manage network security
- B) To regulate internet speed
- C) To prioritize network traffic
- D) To control DNS servers
- Answer: C) To prioritize network traffic
Question: Which of the following is a stateless protocol?
- A) TCP
- B) UDP
- C) HTTP
- D) SMTP
- Answer: B) UDP
Question: What is the role of a repeater in a network?
- A) To connect different networks
- B) To amplify and extend the reach of a network signal
- C) To filter and forward data based on IP addresses
- D) To manage wireless security
- Answer: B) To amplify and extend the reach of a network signal
Question: Which protocol is used for remotely accessing and managing network devices?
- A) FTP
- B) SSH
- C) SNMP
- D) HTTP
- Answer: B) SSH
Question: What is the purpose of a WPA key in a wireless network?
- A) To identify the network
- B) To encrypt wireless communication
- C) To assign IP addresses to devices
- D) To manage DNS servers
- Answer: B) To encrypt wireless communication
Question: Which type of network topology is highly fault-tolerant?
- A) Bus
- B) Ring
- C) Star
- D) Mesh
- Answer: D) Mesh
Question: What is the function of a DNS cache?
- A) To store recently accessed websites for faster retrieval
- B) To manage network security
- C) To regulate internet speed
- D) To encrypt data traffic
- Answer: A) To store recently accessed websites for faster retrieval
Question: Which protocol is used for secure web browsing?
- A) HTTP
- B) HTTPS
- C) FTP
- D) SMTP
- Answer: B) HTTPS
Question: What is the purpose of ICMP in networking?
- A) Internet Control Message Protocol
- B) Internet Communication Management Process
- C) International Connection Monitoring Protocol
- D) Internet Configuration and Management Process
- Answer: A) Internet Control Message Protocol
Question: Which of the following is an advantage of using a dynamic IP address?
- A) Improved security
- B) Easier network administration
- C) Better performance
- D) Static configuration
- Answer: B) Easier network administration
Question: What is the purpose of a DMZ (Demilitarized Zone) in network security?
- A) To isolate internal networks from external threats
- B) To enhance wireless connectivity
- C) To regulate internet speed
- D) To manage DNS servers
- Answer: A) To isolate internal networks from external threats
Question: Which layer of the OSI model is responsible for encryption and decryption?
- A) Physical LayerB) Data Link LayerC) Presentation LayerD) Transport Layer
Answer: C) Presentation Layer
Question: What is the purpose of a load balancer in a network?
- A) To manage network security
- B) To distribute incoming network traffic across multiple servers
- C) To regulate internet speed
- D) To assign IP addresses to devices
- Answer: B) To distribute incoming network traffic across multiple servers
Question: Which protocol is used for transferring files over the internet?
- A) FTP
- B) SMTP
- C) HTTP
- D) DNS
- Answer: A) FTP
Question: What is the purpose of NAT (Network Address Translation)?
- A) To translate domain names to IP addresses
- B) To translate private IP addresses to public IP addresses
- C) To encrypt network traffic
- D) To enhance network speed
- Answer: B) To translate private IP addresses to public IP addresses
Question: Which device operates at the Application Layer of the OSI model?
- A) Router
- B) Switch
- C) Hub
- D) Gateway
- Answer: D) Gatew
Question: What is the role of a DHCP server in a network?
- A) To translate domain names to IP addresses
- B) To assign IP addresses to devices dynamically
- C) To manage network security
- D) To enhance wireless connectivity
- Answer: B) To assign IP addresses to devices dynamically
Which type of cable is commonly used for connecting different network devices, such as computers and switches?
- A) Coaxial cable
- B) Fiber-optic cable
- C) Ethernet cable
- D) USB cable
- Answer: C) Ethernet cable
What is the primary purpose of a computer network?
- A) File storage
- B) Communication
- C) Gaming
- D) Graphic design
- Answer: B) Communication
Which layer of the OSI model is responsible for data encryption and decryption?
- A) Physical layer
- B) Data Link layer
- C) Presentation layer
- D) Transport layer
- Answer: C) Presentation layer
Which device operates at the Data Link layer of the OSI model?
- A) Hub
- B) Router
- C) Switch
- D) Bridge
Answer: D) Bridge What is the purpose of DNS in a computer network?
- A) Dynamic Network Settings
- B) Domain Name System
- C) Data Network Security
- D) Digital Naming Service
Answer: B) Domain Name System Which protocol is used for secure communication over a computer network?
- A) FTP
- B) HTTP
- C) SSL/TLS
- D) SMTP
- Answer: C) SSL/TLS
What is the maximum range of IPv4 addresses?
- A) 128.0.0.0 to 255.255.255.255
- B) 0.0.0.0 to 255.255.255.255
- C) 1.0.0.0 to 223.255.255.255
- D) 0.0.0.0 to 127.255.255.255
- Answer: C) 1.0.0.0 to 223.255.255.255
Which networking device operates at the Application layer of the OSI model?
- A) Router
- B) Hub
- C) Gateway
- D) Firewall
Answer: C) Gateway What is the purpose of the ARP (Address Resolution Protocol)?
- A) To map IP addresses to MAC addresses
- B) To establish secure connections
- C) To resolve domain names
- D) To manage network traffic
Answer: A) To map IP addresses to MAC addresses Which of the following is a connection-oriented protocol?
- A) UDP
- B) ICMP
- C) TCP
- D) IP
- Answer: C) TCP
What is the function of a DHCP server in a network?
- A) Assigning IP addresses dynamically
- B) Blocking unauthorized access
- C) Transmitting emails
- D) Routing data packets
- Answer: A) Assigning IP addresses dynamically
Which topology connects all devices in a circle?
- A) Star
- B) Bus
- C) Ring
- D) Mesh
- Answer: C) Ring
In networking, what is a MAC address used for?
- A) Identifying a device on the internet
- B) Assigning IP addresses
- C) Identifying a device on a local network
- D) Configuring routers
- Answer: C) Identifying a device on a local network
Which protocol is used for email communication on the internet?
- A) FTP
- B) SMTP
- C) HTTP
- D) ICMP
- Answer: B) SMTP
What is the purpose of NAT (Network Address Translation)?
- A) Encrypting dataB) Translating domain names to IP addressesC) Assigning IP addresses dynamicallyD) Mapping private IP addresses to a single public IP addressAnswer: D) Mapping private IP addresses to a single public IP address
Which device operates at the Network layer of the OSI model?
- A) RepeaterB) HubC) RouterD) SwitchAnswer: C) Router
What is the default port for HTTP traffic?
- A) 80B) 443C) 22D) 21Answer: A) 80
Which of the following is a wireless networking standard?
- A) EthernetB) BluetoothC) GigabitD) Fast EthernetAnswer: B) Bluetooth
Which protocol is used for secure file transfer over a network?
- A) FTPB) SCPC) SNMPD) TelnetAnswer: B) SCP
What is the purpose of a firewall in a computer network?
- A) Filtering network trafficB) Assigning IP addressesC) Translating domain namesD) Dynamic routingAnswer: A) Filtering network traffic
Which of the following is a private IP address?
- A) 192.168.1.1B) 172.16.1.1C) 10.0.0.1D) All of the aboveAnswer: D) All of the above
What is the purpose of ICMP (Internet Control Message Protocol)?
- A) Secure data transmissionB) Network diagnostics and error reportingC) Dynamic IP addressingD) File sharingAnswer: B) Network diagnostics and error reporting
Which device connects multiple networks and operates at the Network layer?
- A) SwitchB) HubC) RouterD) RepeaterAnswer: C) Router
What is the primary function of a switch in a network?
- A) Connects different networksB) Filters and forwards data based on MAC addressesC) Translates IP addressesD) Provides wireless connectivityAnswer: B) Filters and forwards data based on MAC addresses
Which layer of the OSI model is responsible for logical addressing?
- A) Network layerB) Data Link layerC) Transport layerD) Physical layerAnswer: A) Network layer
Which of the following is a top-level domain (TLD)?
- A) .comB) 192.168.1.1C) wwwD) ftpAnswer: A) .com
**What is the purpose of VLANs (Virtual Local Area Networks) in networking?**
- A) Increasing internet speedB) Segmentation of a physical network into multiple logical networksC) Assigning IP addresses dynamicallyD) Connecting different types of networksAnswer: B) Segmentation of a physical network into multiple logical networks
Which protocol is used for transferring files over the internet?
- A) HTTPB) FTPC) SMTPD) SNMPAnswer: B) FTP
What is the subnet mask for the IP address 192.168.1.1 with a subnet of 255.255.255.0?
- A) 255.0.0.0B) 255.255.0.0C) 255.255.255.0D) 0.0.0.0Answer: C) 255.255.255.0
Which of the following is a disadvantage of a peer-to-peer network?
- A) Centralized controlB) ScalabilityC) Limited securityD) High costAnswer: C) Limited security
What is the purpose of QoS (Quality of Service) in networking?
- A) Ensuring network securityB) Prioritizing and managing network trafficC) Assigning IP addresses dynamicallyD) Filtering unwanted data packetsAnswer: B) Prioritizing and managing network traffic
Which wireless standard operates in the 2.4 GHz frequency band?
- A) 802.11aB) 802.11bC) 802.11gD) 802.11nAnswer: B) 802.11b
What is the purpose of a proxy server in a network?
- A) Providing wireless connectivityB) Filtering and forwarding network trafficC) Assigning IP addresses dynamicallyD) Translating domain names to IP addressesAnswer: B) Filtering and forwarding network traffic
Which protocol is used for remotely accessing and managing devices over a network?
- A) FTPB) SNMPC) ICMPD) TelnetAnswer: D) Telnet
What is the purpose of a DNS server in a network?
- A) Assigning IP addressesB) Filtering network trafficC) Resolving domain names to IP addressesD) Managing file storageAnswer: C) Resolving domain names to IP addresses
Which of the following is a characteristic of a mesh topology?
- A) Single point of failureB) Simple to configureC) Redundant pathsD) Limited scalabilityAnswer: C) Redundant paths
What is the role of a repeater in a network?
- A) Connects different networksB) Filters and forwards data based on MAC addressesC) Extends the range of a networkD) Provides wireless connectivityAnswer: C) Extends the range of a network
Which layer of the OSI model is responsible for error detection and correction?
- A) Data Link layerB) Physical layerC) Network layerD) Transport layerAnswer: D) Transport layer
What is the purpose of a gateway in a network?
- A) Filtering network trafficB) Connecting different types of networksC) Assigning IP addressesD) Translating domain names to IP addressesAnswer: B) Connecting different types of networks
Which protocol is used for sending emails?
- A) FTPB) SMTPC) HTTPD) ICMPAnswer: B) SMTP
What is the function of NAT (Network Address Translation) in a home router?
- A) Assigning IP addresses to devicesB) Filtering network trafficC) Translating private IP addresses to a single public IP addressD) Providing wireless connectivityAnswer: C) Translating private IP addresses to a single public IP address
Which of the following is a stateful firewall feature?
- A) Packet filteringB) Dynamic packet filteringC) Proxy servicesD) Static IP assignmentAnswer: B) Dynamic packet filtering
What is the purpose of the TCP three-way handshake?
- A) Establishing a connectionB) Data encryptionC) Error detectionD) Network diagnosticsAnswer: A) Establishing a connection
Which type of cable is commonly used for Ethernet connections?
- A) Coaxial cableB) Fiber optic cableC) Twisted pair cableD) USB cableAnswer: C) Twisted pair cable
What is the purpose of the subnetting in a network?
- A) Assigning IP addresses dynamicallyB) Dividing a large network into smaller, manageable segmentsC) Filtering network trafficD) Providing wireless connectivityAnswer: B) Dividing a large network into smaller, manageable segments
Which of the following is a characteristic of a bus topology?
- A) Redundant pathsB) Single point of failureC) Limited scalabilityD) Complex configurationAnswer: B) Single point of failure
What is the purpose of the OSI model in networking?
- A) Assigning IP addressesB) Providing wireless connectivityC) Standardizing network communication protocolsD) Filtering network trafficAnswer: C) Standardizing network communication protocols
Which of the following is a public IP address?
- A) 10.0.0.1B) 172.16.1.1C) 192.168.1.1D) 203.0.113.1Answer: D) 203.0.113.1
What is the purpose of the ICMP Echo Request and Echo Reply messages?
- A) Dynamic IP addressing
- B) Network diagnostics
- C) File sharing
- D) Data encryption
- Answer: B) Network diagnostics