Flashcards on IT Networking

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What is a computer network?

A computer network is a collection of interconnected devices, such as computers, servers, switches, and routers, that are connected to each other to facilitate communication and data sharing.

What is the purpose of a router in a network?

A router is a networking device that forwards data packets between computer networks. It acts as a gateway for traffic to flow between different networks, ensuring efficient and secure communication.

What is DHCP?

DHCP stands for Dynamic Host Configuration Protocol. It is a network management protocol used to automatically assign IP addresses and other network configuration settings to devices on a network.

What is DNS?

DNS stands for Domain Name System. It is a hierarchical decentralized naming system that maps domain names to IP addresses. DNS is used to translate user-friendly domain names into machine-readable IP addresses.

What is a firewall?

A firewall is a network security device that monitors and filters incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and an untrusted external network.

What is the purpose of subnetting?

Subnetting is the process of dividing a network into smaller subnetworks called subnets. It helps in effectively managing IP addresses and improving network performance by reducing network congestion and improving security.

What is a VLAN?

VLAN stands for Virtual Local Area Network. It is a logical grouping of devices within a LAN that communicate with each other as if they were on a physically separate network. VLANs provide network segmentation and improve network efficiency.

What is a MAC address?

A MAC address, also known as a Media Access Control address, is a unique identifier assigned to a network interface card (NIC). It is used to identify devices on a network at the hardware level.

What is the difference between TCP and UDP?

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are both network protocols used for sending data over the internet. The main difference is that TCP is connection-oriented, providing reliable and ordered delivery of data, while UDP is connectionless and does not guarantee reliable delivery.

What is NAT?

NAT stands for Network Address Translation. It is a process of modifying IP addresses or port numbers of IP packets as they pass through a routing device so that multiple devices can share a single public IP address.

What is a proxy server?

A proxy server acts as an intermediary between clients and servers. It facilitates indirect network connections, improving performance, security, and privacy by caching and filtering requests.

What is the purpose of an IP address?

An IP address is a unique numerical identifier assigned to each device connected to a computer network. It enables devices to send and receive data over the internet or other IP-based networks.

What are the different types of network topologies?

The common types of network topologies include bus, star, ring, mesh, and hybrid. Each topology has its own advantages and disadvantages in terms of cost, scalability, and resilience.

What is a VPN?

A VPN (Virtual Private Network) is a secure, encrypted connection between two or more networks over the internet. It provides remote access, confidentiality, and data integrity for private communication.

What is SNMP?

SNMP (Simple Network Management Protocol) is a protocol used for managing and monitoring network devices. It allows network administrators to collect information, configure devices, and receive notifications about network performance and health.

What is a computer network?

A computer network is a collection of interconnected devices, such as computers, servers, switches, and routers, that are connected to each other to facilitate communication and data sharing.

What is the purpose of a router in a network?

A router is a networking device that forwards data packets between computer networks. It acts as a gateway for traffic to flow between different networks, ensuring efficient and secure communication.

What is DHCP?

DHCP stands for Dynamic Host Configuration Protocol. It is a network management protocol used to automatically assign IP addresses and other network configuration settings to devices on a network.

What is DNS?

DNS stands for Domain Name System. It is a hierarchical decentralized naming system that maps domain names to IP addresses. DNS is used to translate user-friendly domain names into machine-readable IP addresses.

What is a firewall?

A firewall is a network security device that monitors and filters incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and an untrusted external network.

What is the purpose of subnetting?

Subnetting is the process of dividing a network into smaller subnetworks called subnets. It helps in effectively managing IP addresses and improving network performance by reducing network congestion and improving security.

What is a VLAN?

VLAN stands for Virtual Local Area Network. It is a logical grouping of devices within a LAN that communicate with each other as if they were on a physically separate network. VLANs provide network segmentation and improve network efficiency.

What is a MAC address?

A MAC address, also known as a Media Access Control address, is a unique identifier assigned to a network interface card (NIC). It is used to identify devices on a network at the hardware level.

What is the difference between TCP and UDP?

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are both network protocols used for sending data over the internet. The main difference is that TCP is connection-oriented, providing reliable and ordered delivery of data, while UDP is connectionless and does not guarantee reliable delivery.

What is NAT?

NAT stands for Network Address Translation. It is a process of modifying IP addresses or port numbers of IP packets as they pass through a routing device so that multiple devices can share a single public IP address.

What is a proxy server?

A proxy server acts as an intermediary between clients and servers. It facilitates indirect network connections, improving performance, security, and privacy by caching and filtering requests.

What is the purpose of an IP address?

An IP address is a unique numerical identifier assigned to each device connected to a computer network. It enables devices to send and receive data over the internet or other IP-based networks.

What are the different types of network topologies?

The common types of network topologies include bus, star, ring, mesh, and hybrid. Each topology has its own advantages and disadvantages in terms of cost, scalability, and resilience.

What is a VPN?

A VPN (Virtual Private Network) is a secure, encrypted connection between two or more networks over the internet. It provides remote access, confidentiality, and data integrity for private communication.

What is SNMP?

SNMP (Simple Network Management Protocol) is a protocol used for managing and monitoring network devices. It allows network administrators to collect information, configure devices, and receive notifications about network performance and health.

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