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Frequently, questions come up in the Cisco Contact Center Express classes I teach concerning the ability of the system to perform this or that task. In this blog post, I will cover some of the more popular questions I get during class.

Tuning DNS resolution can improve performance and result in much faster internet interactions. encryption improve the privacy protection of online activities.

According to Cisco marketing, Dynamic Multipoint VPN (DMVPN) “will lower capital and operation expenses, simplifies branch communications, reduces deployment complexity, and improves business resiliency.” Okay. But what is it, really, and why should we care?

UFFA, which stands for “Use it, Flag it or Fix it, Add it,” is the responsibility of every support professional in the knowledge management process. It comes from the Knowledge-Centered Support (KCS) methodology where knowledge management is based on collaboration and a shared ownership of the knowledge base. Let’s break it down.

In a properly designed IP network, a VLAN should map to a single broadcast domain, which should map to a unique IP network. For ease of troubleshooting, traffic from one VLAN should not reach another VLAN without an OSI Layer 3 device, such as a router.

Spanning Tree Protocol (STP) is dead, or at least it should be. It’s too slow to converge when there’s a change, and it causes issues with performance because there is only one forwarding path. It was developed in 1985 by Radia Perlman at Digital Equipment Corporation to allow for redundant paths within a Layer 2 topology, which was great in 1985. In fact, it was huge! So much so, that it was later standardized by the IEEE as 802.1D, and we’ve been living with it ever since.

David Wilson discusses on how your digital footprint could become a security risk espcially with how much of your personal information is online. Learn more.

The Internet is not a safe place. We see that more than ever with the security breaches of businesses and individuals in the news on a daily basis. As Internet citizens, we need to take our protection into our own hands, as obviously most online services are not doing their best to protect us.

As I’ve stated before, I like Border Gateway Protocol (BGP). I think it’s an interesting protocol, and yes — it’s complicated, but I guess that part of why I like it. There are a lot of knobs to tweak in BGP, maybe too many, but that’s another post. Anyway, we are now running BGP version 4 and it has had extensions written that support more than just IPv4 unicast routing. We now have IPv4 multicast, IPv6 unicast and multicast, VPNv4, VPNv6, and a few others.

James Michael Stewart shares his top 5 common activities that break company security policy and how to take action with Global Knowledge's resources. View here.