Networking Intermediate Questions
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What is a VLAN and why would you use it?
A VLAN (Virtual Local Area Network) is a logical grouping of devices that appear to be on the same LAN even if they are on separate IP subnetworks, which helps reduce network traffic and provides segmentation.
Can you explain the difference between a switch and a hub?
A switch forwards data to a specific device, whereas a hub broadcasts data to all devices on a network.
What is the function of a Network Interface Card (NIC)?
A Network Interface Card (NIC) is a hardware component that allows computers to connect to a network.
What is a default gateway? Why is it necessary?
A default gateway serves as an access point or IP router that a networked device uses to send information to a device in another network or the internet.
Can you explain how NAT works?
NAT (Network Address Translation) allows a single device to act as an agent between the Internet and a local network, which means that only a single unique IP address is required to represent an entire group of computers.
What is a proxy server and when would you use one?
A proxy server is a go-between for a workstation and the internet, providing security, administrative control, and caching service.
Can you explain the difference between TCP and UDP?
TCP (Transmission Control Protocol) is connection-oriented, guarantees the delivery of packets, and is used when reliability is required. UDP (User Datagram Protocol) is connection-less and doesn't guarantee delivery, making it faster and suitable for applications like live streaming.
What is ARP and what is its function?
ARP (Address Resolution Protocol) is used to map an IP address to a physical (MAC) address on the local network.
What are the different types of network topologies?
Network topologies include Bus, Star, Ring, Mesh, Tree, etc., each having their own advantages and disadvantages.
Can you explain the concept of QoS?
QoS (Quality of Service) is a mechanism to ensure better service to certain types of network traffic.
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