50 objective questions along with their answers related to computer networks:
- Question: What is the purpose of a router in a computer network?
Answer: A router is used to forward data packets between computer networks, facilitating communication between devices on different networks. - Question: What is the difference between a hub and a switch in networking?
Answer: A hub operates at the physical layer of the OSI model and broadcasts data to all connected devices, while a switch operates at the data link layer and selectively forwards data packets to the appropriate device based on MAC addresses. - Question: What does TCP/IP stand for?
Answer: TCP/IP stands for Transmission Control Protocol/Internet Protocol, which is a suite of networking protocols used for communication over the internet. - Question: What is the purpose of ARP (Address Resolution Protocol)?
Answer: ARP is used to map IP addresses to MAC addresses in a local network, allowing devices to communicate with each other. - Question: What is a MAC address?
Answer: A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communication on a network. - Question: What is the maximum data rate of Ethernet in a standard LAN?
Answer: The maximum data rate of Ethernet in a standard LAN is currently 10 Gbps (Gigabits per second) for wired connections. - Question: What is the purpose of NAT (Network Address Translation)?
Answer: NAT is used to translate private IP addresses to public IP addresses and vice versa, enabling devices within a private network to communicate with devices on the internet. - Question: What is the difference between IPv4 and IPv6?
Answer: IPv4 uses 32-bit addresses, allowing for approximately 4.3 billion unique addresses, while IPv6 uses 128-bit addresses, providing a much larger address space to accommodate the growing number of internet-connected devices. - Question: What is the purpose of DNS (Domain Name System) in networking?
Answer: DNS is used to translate domain names into IP addresses, allowing users to access websites using human-readable names instead of numerical IP addresses. - Question: What is the function of a firewall in computer networking?
Answer: A firewall is used to monitor and control incoming and outgoing network traffic based on predetermined security rules, protecting a network from unauthorized access and malicious attacks. - Question: What does LAN stand for?
Answer: LAN stands for Local Area Network, which is a network that spans a small geographical area, typically within a single building or campus. - Question: What is the purpose of DHCP (Dynamic Host Configuration Protocol) in networking?
Answer: DHCP is used to automatically assign IP addresses and other network configuration parameters to devices on a network, simplifying the process of network configuration and management. - Question: What is the function of a modem in networking?
Answer: A modem is used to modulate and demodulate digital data for transmission over analog communication channels, such as telephone lines or cable systems. - Question: What is the difference between a hub and a switch in networking?
Answer: A hub operates at the physical layer of the OSI model and broadcasts data to all connected devices, while a switch operates at the data link layer and selectively forwards data packets to the appropriate device based on MAC addresses. - Question: What does WAN stand for?
Answer: WAN stands for Wide Area Network, which is a network that covers a broad geographical area, connecting multiple LANs and other networks across long distances. - Question: What is the purpose of ICMP (Internet Control Message Protocol) in networking?
Answer: ICMP is used to send error messages and operational information between network devices, such as routers and hosts, to diagnose network problems and troubleshoot connectivity issues. - Question: What is the purpose of VLAN (Virtual Local Area Network) in networking?
Answer: VLAN is used to logically divide a single physical LAN into multiple virtual LANs, allowing for better network segmentation, security, and traffic management. - Question: What is the function of a gateway in networking?
Answer: A gateway is used to connect two or more networks with different protocols or architectures, enabling communication between devices on different networks. - Question: What is the difference between half-duplex and full-duplex communication?
Answer: In half-duplex communication, data can be transmitted and received, but not simultaneously, while in full-duplex communication, data can be transmitted and received simultaneously. - Question: What is the purpose of QoS (Quality of Service) in networking?
Answer: QoS is used to prioritize network traffic based on predefined criteria, such as bandwidth, latency, and packet loss, to ensure that critical applications receive sufficient resources and performance. - Question: What is the function of a repeater in networking?
Answer: A repeater is used to regenerate and amplify signals to extend the reach of a network, allowing data to be transmitted over longer distances without degradation. - Question: What is the difference between TCP and UDP?
Answer: TCP (Transmission Control Protocol) is a connection-oriented protocol that provides reliable, ordered, and error-checked delivery of data, while UDP (User Datagram Protocol) is a connectionless protocol that provides faster but less reliable delivery of data. - Question: What is the purpose of STP (Spanning Tree Protocol) in networking?
Answer: STP is used to prevent network loops and ensure redundancy in Ethernet networks by dynamically disabling redundant paths and selecting the most efficient path for data transmission. - Question: What is the difference between unicast, multicast, and broadcast communication?
Answer: Unicast communication involves sending data from one sender to one receiver, multicast communication involves sending data from one sender to multiple receivers, and broadcast communication involves sending data from one sender to all receivers on a network. - Question: What is the purpose of ACLs (Access Control Lists) in networking?
Answer: ACLs are used to control access to network resources by defining rules that permit or deny traffic based on criteria such as source and destination IP addresses, port numbers, and protocols. - Question: What is the function of a proxy server in networking?
Answer: A proxy server is used to act as an intermediary between clients and servers, forwarding requests from clients to servers and returning responses from servers to clients, while also providing additional security, anonymity, and performance optimization features. - Question: What is the purpose of a DNS resolver in networking?
Answer: A DNS resolver is used to query DNS servers and resolve domain names into IP addresses, enabling clients to access websites and other internet resources using human-readable names. - Question: What is the difference between routing and switching in networking?
Answer: Routing involves forwarding data packets between different networks based on destination IP addresses, while switching involves forwarding data packets within the same network based on MAC addresses. - Question: What is the purpose of VLAN trunking in networking?
Answer: VLAN trunking is used to carry traffic for multiple VLANs over a single physical link, enabling VLANs to span multiple switches and network segments. - Question: What is the function of a DHCP relay agent in networking?
Answer: A DHCP relay agent is used to forward DHCP messages between clients and DHCP servers located on different subnets, enabling DHCP clients to obtain IP addresses and other configuration parameters from remote DHCP servers. - Question: What is the purpose of a network bridge in networking?
Answer: A network bridge is used to connect two or more network segments and forward traffic between them based on MAC addresses, effectively extending the size of a LAN and reducing network congestion. - Question: What is the difference between IPv4 and IPv6?
Answer: IPv4 uses 32-bit addresses, allowing for approximately 4.3 billion unique addresses, while IPv6 uses 128-bit addresses, providing a much larger address space to accommodate the growing number of internet-connected devices. - Question: What is the function of a network switch in networking?
Answer: A network switch is used to connect multiple devices on a LAN and forward data packets between them based on MAC addresses, effectively creating a network with multiple collision domains and increasing bandwidth efficiency. - Question: What is the purpose of a network gateway in networking?
Answer: A network gateway is used to connect two or more networks with different protocols or architectures, enabling communication between devices on different networks. - Question: What is the difference between a router and a switch in networking?
Answer: A router operates at the network layer of the OSI model and forwards data packets between different networks based on IP addresses, while a switch operates at the data link layer and forwards data packets within the same network based on MAC addresses. - Question: What is the function of ARP (Address Resolution Protocol) in networking?
Answer: ARP is used to map IP addresses to MAC addresses in a local network, allowing devices to communicate with each other. - Question: What is the purpose of a network hub in networking?
Answer: A network hub is used to connect multiple devices on a LAN and broadcast data packets to all connected devices, effectively creating a network with a single collision domain and limiting bandwidth efficiency. - Question: What is the difference between a network bridge and a network switch?
Answer: A network bridge operates at the data link layer of the OSI model and forwards data packets between different network segments based on MAC addresses, while a network switch operates at the same layer and forwards data packets within the same network based on MAC addresses. - Question: What is the purpose of NAT (Network Address Translation) in networking?
Answer: NAT is used to translate private IP addresses to public IP addresses and vice versa, enabling devices within a private network to communicate with devices on the internet. - Question: What is the function of a network firewall in networking?
Answer: A network firewall is used to monitor and control incoming and outgoing network traffic based on predetermined security rules, protecting a network from unauthorized access and malicious attacks. - Question: What is the difference between a network gateway and a network router?
Answer: A network gateway is a broader term that refers to any device or software that connects two or more networks with different protocols or architectures, while a network router is a specific type of gateway that operates at the network layer and forwards data packets between different networks based on IP addresses. - Question: What is the purpose of DNS (Domain Name System) in networking?
Answer: DNS is used to translate domain names into IP addresses, allowing users to access websites using human-readable names instead of numerical IP addresses. - Question: What is the function of a network proxy server in networking?
Answer: A network proxy server is used to act as an intermediary between clients and servers, forwarding requests from clients to servers and returning responses from servers to clients, while also providing additional security, anonymity, and performance optimization features. - Question: What is the difference between a network hub and a network switch?
Answer: A network hub operates at the physical layer of the OSI model and broadcasts data to all connected devices, while a network switch operates at the data link layer and selectively forwards data packets to the appropriate device based on MAC addresses. - Question: What is the purpose of DHCP (Dynamic Host Configuration Protocol) in networking?
Answer: DHCP is used to automatically assign IP addresses and other network configuration parameters to devices on a network, simplifying the process of network configuration and management. - Question: What is the function of a network bridge in networking?
Answer: A network bridge is used to connect two or more network segments and forward traffic between them based on MAC addresses, effectively extending the size of a LAN and reducing network congestion. - Question: What is the difference between TCP and UDP?
Answer: TCP (Transmission Control Protocol) is a connection-oriented protocol that provides reliable, ordered, and error-checked delivery of data, while UDP (User Datagram Protocol) is a connectionless protocol that provides faster but less reliable delivery of data. - Question: What is the purpose of VLAN (Virtual Local Area Network) in networking?
Answer: VLAN is used to logically divide a single physical LAN into multiple virtual LANs, allowing for better network segmentation, security, and traffic management. - Question: What is the function of a network repeater in networking?
Answer: A network repeater is used to regenerate and amplify signals to extend the reach of a network, allowing data to be transmitted over longer distances without degradation. - Question: What is the purpose of a network gateway in networking?
Answer: A network gateway is used to connect two or more networks with different protocols or architectures, enabling communication between devices on different networks.
