- What is the difference between a switch and a hub?
- What is a VLAN and how does it work?
- What is the purpose of the OSI model?
- What is the difference between TCP and UDP?
- Explain the three-way handshake process in TCP.
- What is NAT and how does it work?
- What is the difference between static routing and dynamic routing?
- What is the purpose of subnetting?
- What is the difference between a router and a layer 3 switch?
- Explain the purpose of ARP and how it works.
- What is STP and how does it prevent network loops?
- What is the difference between half-duplex and full-duplex communication?
- What is a DNS server and how does it work?
- What is DHCP and how does it work?
- What is the purpose of ACLs and how are they used in network security?
I hope these questions help you prepare for your CCNA level interview!