Access Control Lists (ACLs) allow a router to permit or deny packets based on a variety of criteria.
Configuring An Access Server
As your CCNA / CCNP home lab expands, an access server such as the Cisco 2509 or 2511 is one of the best investments you can make.
Configuring CGMP On Routers & Switches
If a Layer Two switch doesn’t have the capabilities to run IGMP Snooping, it will be able to run CGMP – Cisco Group Membership Protocol. CGMP allows the multicast router to work with the Layer Two switch to eliminate unnecessary multicast forwarding.
Configuring And Troubleshooting VTP
Not only is your CCNA exam going to have questions on VLAN trunking protocol, almost any network that has more than one VLAN is going to have VTP running.
Configuring PortFast And BPDU Guard
In your CCNA studies, you learned about PortFast and the trouble it can cause if configured on the wrong port!
Cisco CCNP / BCSI Exam Tutorial: Configuring EIGRP Packet Authentication
Configuring RIPv2 and EIGRP authentication with key chains can be tricky at first, and the syntax isnt exactly easy to remember.
Configuring Basic Cisco Router Security
Network security is a hot topic today, and will only increase in importance in the months and years ahead.
Introduction To ISDN, Part IV: Configuring PPP CHAP Authentication
In part III of this ISDN primer, we learned that PPP has two main methods of authentication that Cisco certification candidates need to know how to configure: PAP and CHAP.