Cisco CCNA Certification: The (Many) Different Kinds Of Switching by Chris Bryant
When you're studying for your CCNA exam, whether you're taking the Intro-ICND path or the single-exam path, you're quickly introduced to the fact that switching occurs at Layer 2 of the OSI model. No problem there, but then other terms involving switching are thrown in, and some of them can be... The circuit-switching technology most familiar to CCNA candidates is ISDN. ... Cell-switched packets are fixed in length. ... When the protocol runs at Layer 2 rather than Layer 3, the process is referred to as frame switching.

Cisco CCNA Exam Tutorial: Route Summarization by Chris Bryant
Preparing to pass the CCNA exam and earn this important Cisco certification? Route summarization is just one of the many skills you'll have to master in order to earn your CCNA. Whether it's RIP version 2, OSPF, or EIGRP, the CCNA exam will demand that you can flawlessly configure route... For the CCNA exam, emphasis is put on knowing how to advertise these summary routes in RIPv2 and EIGRP. ... I speak from experience when I tell you that practice makes perfect on the CCNA exam, especially with binary and summarization questions.

Cisco CCNA Certification Exam Tutorial: ISDN Details You Must Know by Chris Bryant
CCNA exam success depends partially on knowing the details of ISDN, and there are plenty of them! To help you review for your CCNA exam, here are a few ISDN details that you must know on exam day. (They help in the real world, too – and there are still plenty of ISDN networks out there! ... Load threshold to place another call Success on the CCNA exam depends on knowing the details. ... (Even IOS Help isn’t totally clear on this.) R2(config)#int bri0 R2(config-if)#dialer-group 1 R2(config-if)#dialer idle-timeout ?

CCNA Cisco Certification Training Case Study: How Multiple Passwords Affect Router Access by Chris Bryant
Your CCNA certification exam efforts must include practicing with different password types and knowing how to configure them on a Cisco router - but for CCNA exam success and to thrive in real-world networks, you also have to know how to examine a Cisco router configuration and determine the... Knowing how to read a Cisco router configuration is a valuable skill for both the CCNA certification exam and working with production networks. ... There's a single line near the top of a Cisco router configuration that tells you why..

Cisco CCNA Certification Exam Tutorial: RIP Details You Must Know by Chris Bryant
RIP isn't exactly the most complex routing protocol on the CCNA exam, but that makes it easy to overlook some of the important details you must keep in mind in order to pass the exam! To help you review for the exam, here are just a few of those details! ... R1#undebug all All possible debugging has been turned off Don't overlook RIP and IGRP when it comes to the CCNA exam. ... Debug ip rip displays the routing updates and metrics as the advertisements are sent and requested. ... R1#debug ip rip RIP protocol debugging is on R1#clear ip route * 01:16:54: RIP: sending v1 update to...

Cisco CCNP / BSCI Certification: The BGP Attribute "MED" by Chris Bryant
When you're preparing to pass the BSCI exam and earn your CCNP certification, one of the biggest challenges is learning BGP. BGP is totally different from any protocol you learned to earn your CCNA certification, and one of the differences is that BGP uses path attributes to favor one path over... R1(config-route-map)#router bgp 100 R1(config-router)#neighbor 22.2.2.2 route-map PREFER_PATH out The key points to keep in mind is that while many BGP attributes prefer a higher value, the MED is basically an external metric - and a lower metric is preferred, just as with the protocols you've...

Cisco CCNA Certification Exam Tutorial: Configuring Dialer Profiles by Chris Bryant
The most common method of configuring ISDN is with dialer maps, but dial information can also be configured on a logical interface. To pass the CCNA exam, you must know how to configure and troubleshoot both dialer maps and dialer profiles. Dialer Profiles allow different dialing information to... Configuring dialer profiles can be a little tricky at first, and the best way to master this skill is to get real hands-on practice in your own CCNA / CCNP home lab or a rack rental service. ... R1(config)#interface dialer0 R1(config-if)#ip address 172.16.1.1 255.255.255.0...

Cisco CCNA / CCNP Certification Exam Review: Protocol Basics by Chris Bryant
To earn your Cisco CCNA certification and pass the BSCI CCNP exam, you have to know your protocol basics like the back of your hand! To help you review these important concepts, here's a quick look at the basics of RIPv1, RIPv2, IGRP, and EIGRP. RIPv1: Broadcasts updates every 30 seconds to the... By mastering the basics of these protocols, you're laying the foundation for success in the exam room and when working on production networks. ... Equal-cost load-balancing on by default; unequal-cost load-sharing can be used with the variance command.

Cisco Certification: The OSI Model, Part I by Chris Bryant
To conquer the Introduction To Cisco Networking exam, and to begin the process of becoming an expert network troubleshooter, you have to master the OSI model and learn what happens at each of the seven layers. In this three-part series, we'll examine each level of the OSI model, paying... Passing the CCNA exam is all in the details, though, and you need to know what happens at the Application layer, as well as the common and not-so-common applications that run at this layer. ... While we don’t have a great deal of interaction with this layer, you need to know what happens at this layer to...

Cisco CCNP / BSCI Tutorial: The Role Of The OSPF ASBR by Chris Bryant
To pass the BSCI exam and earn your CCNP certification, you've got to master the (many) details of OSPF. You might have thought there were quite a few OSPF details in your CCNA studies, but you'll now build on that foundation on the way to earning your CCNP. ... The name itself raises some eyebrows, since you learned in your CCNA studies that OSPF doesn't use autonomous systems! ... When the RIP routes are redistributed into OSPF, that router is then an ASBR. ... In the below example, RIP subnets have been redistributed into OSPF.