â–º What is the difference between layer 2 and layer 3 in the OSI model?

â–º What is the difference between a hub, switch, and router?

â–º What is a VLAN?

â–º What is the difference between TCP and UDP?

â–º How do you distinguish a DNS problem from a network problem?

â–º What are a runt, Giant, and collision?

â–º What is a broadcast storm?

â–º What is the purpose of VRRP?

â–º What is a VPN?

â–º What is a default route?

â–º How do you set a default route on an IOS Cisco router?

â–º What is a metric?

â–º What is a MAC address?

â–º What is ARP/RARP?

â–º Describe a TCP connection sequence.

â–º What is MTU?

â–º What other TCP setting can you modify besides MTU to shorten packets?