[quote][b]Posted by:[/b] dazarobbo 1. Which would you say is more useful in subnetting (esp. VLSM): Understanding of binary arithmetic or experience? Or do you cheat and use a subnet calculator? ;) 2. How prevalent is IOS? Am I more likely to find it or something else? 3. What advice do you have for determining how many redundant VLAN trunks to use? 4. Do you advocate the use of IPv6, IPv4, another network protocol, or a hybrid (ie. IPv6 tunnelling) (especially in new networks)? 5. What can you say about Cisco accreditation? What opportunities open up for someone with a CCNP qualification as compared to a CCNA qualification? 6. In practice, how important/useful is it to understand the theoretical components behind how the network works? eg. CSMA/CD operation, delay (processing, queuing, transmission, propagation), etc... 7. I've heard layer 3 switches/switching is all the rage. How prevalent is their use? 8. What tips do you have for more thoroughly understanding how to use ACL wildcards? 9. Is it "better" to use a dedicated machine as a firewall or a router with ACLs? 10. How often is the creation of VLANs essential? 11. Do you still find links using PAP? 12. Can you confirm for me that using CHAP with a fallback to PAP is inherently insecure?[/quote]Yep. Also, what is your position on using Vorpal Positron Capacitors as opposed to Hyper Active Post Traumatic Glorx Brains in order to meet YOLO and ROFL requirements?