Network Administrator Positions

Some of these questions may also be included in the entry level category for Help Desk Technician positions. In either case, they’re worth preparing for.

1. What is the difference between layer 2 and layer 3 in the OSI model?

2. What is the difference between a hub, switch, and router?

3. What is a VLAN?

4. What is the difference between TCP and UDP?

5. How do you distinguish a DNS problem from a network problem?

6. What are a runt, Giant, and collision?

7. What is a broadcast storm?

8. What is the purpose of VRRP?

9. What is a VPN?

10. What is a default route?

11. How do you set a default route on an IOS Cisco router?

12. What is a metric?

13. What is a MAC address?

14. What is ARP/RARP?

15. Describe a TCP connection sequence.

16. What is MTU?

17. What other TCP setting can you modify besides MTU to shorten packets?