What is the difference between a hub and a switch? (Cisco, Juniper Networks)
What is the OSI model and how does it relate to networking? (Amazon, Google)
What is a subnet mask and how is it used in networking? (Microsoft, IBM)
What is the difference between TCP and UDP? (Oracle, Apple)
What is a DNS server and how does it work? (Facebook, Netflix)
What is a VLAN and how does it improve network security? (Intel, Cisco)
What is NAT and how does it work? (Amazon, Cisco)
What is a firewall and how does it protect a network? (Microsoft, IBM)
What is the difference between IPv4 and IPv6? (Google, Cisco)
What is a proxy server and how does it work? (Facebook, Netflix)
What is a VPN and how does it work? (Oracle, Apple)
What is the purpose of ARP in networking? (Intel, Cisco)
What is QoS and why is it important in networking? (Amazon, Google)
What is a MAC address and how is it used in networking? (Microsoft, IBM)
What is a router and how does it work? (Facebook, Netflix)
What is the purpose of ICMP in networking? (Oracle, Apple)
What is a load balancer and how does it improve network performance? (Intel, Cisco)
What is a CDN and how does it work? (Amazon, Google)
What is a packet and how does it travel through a network? (Microsoft, IBM)
What is a network topology and what are the different types? (Facebook, Netflix)