 Category :: Computer Certification Articles |
Author :: Chris Bryant, CCIE #12933  |
| |
| Article Title :: Cisco CCNA Certification: Error Detection vs. Error Recovery |
| |
| Passing the CCNA, Intro, and ICND exam is all about knowing and noticing the details. (Which makes perfect sense, since becoming a master networking administrator or engineer is also about noticing the details!) One such detail knows the difference between error detection and error recovery. While the terms are sometimes used interchangeably, they are not the same thing.
Error detection is just that - error detection only. Two common error detection methods are found at the Data Link layer of the OSI model, the FCS (Frame Check Sequence) and CRC (Cyclical Redundancy Check). A mathematical equation is run against the data in the frame, and the result is sent along with the data. (read full article) |
| |
 |  |
| |
| Category :: Computer Certification Articles |
Author :: Chris Bryant, CCIE #12933 |
| |
| Article Title :: Cisco CCNP / BSCI Certification: The Local Preference BGP Attribute |
| |
| When studying for your BSCI exam for the CCNP, you get your first taste of BGP. One of the major differences between BGP and the other protocols you've studied to date is that BGP uses attributes to describe paths, and to influence the selection of one path over the other.
In this free tutorial, we're going to take a look at the Local Preference attribute and compare it to the Cisco-proprietary BGP attribute "weight".
The Local Preference (LOCAL_PREF) attribute is used to influence how traffic will flow from one Autonomous System (AS) to another when multiple paths exist. For example, if AS 100 has two different paths to a destination network in AS 200, the LOCAL_PR (read full article) |
| |
| |
| |
| Category :: Computer Certification Articles |
Author :: Chris Bryant, CCIE #12933 |
| |
| Article Title :: Cisco CCNA Certification: Cisco Switching Modes Tutorial |
| |
| To pass the CCNA exam and earn that coveted certification, you've got to know Cisco switches inside and out. Among the many important details you've got to know are the three methods that Cisco switches use to forward frames, and the differences between the three.
The first switching method is Store-and-Forward. The name is the recipe, because that's just what the switch does - it stores the entire frame before beginning to forward it. This method allows for the greatest amount of error checking, since the Frame Check Sequence (FCS) can be run before the frame is forwarded. As always, there is a tradeoff, since this error checking process makes this the slowest of the three fram (read full article) |
| |
| |
| |
| Category :: Computer Certification Articles |
Author :: Chris Bryant, CCIE #12933 |
| |
| Article Title :: Cisco CCNP / BSCI Certification: The BGP Attribute “MED” |
| |
| 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 another when multiple paths to or from a destination exist.
Notice I said "to or from". In earlier free BGP tutorials, I discussed the BGP attributes "weight" and "local preference". These attributes are used to favor one path to a destination over another; for example, if BGP AS 100 has two paths to a destination in AS 200, these two attributes can be set in AS 100 to favor one path over (read full article) |
| |
| |
| |
| Category :: Computer Certification Articles |
Author :: Chris Bryant |
| |
| Article Title :: Cisco CCNA Certification: Becoming A Truly Valuable CCNA |
| |
| I've been active in the Cisco Certification track for four years, working my way from the CCNA to the coveted Cisco Certified Internetwork Expert title, and during that time I've conducted job interviews and casual conversations with hundreds of CCNAs and CCNA candidates.The CCNA is an exciting beginning to your Cisco career, but just having the certification simply isn't enough. A recruiter or interviewer isn't going to be impressed just with the cert; you've got to have some real-world knowledge to back it up.I've been down that road myself, and sat on both sides of the CCNA job interview table. With that in mind, I'd like to offer to you some tips on becoming a truly va (read full article) |
| |
| |
| |
| Category :: Computer Certification Articles |
Author :: Chris Bryant |
| |
| Article Title :: Cisco Certification: Five Things To Do DURING Your CCNA Exam |
| |
| There are plenty of articles out there about how to prepare for the CCNA exam. However, there are also things you can do to increase your chances of success on exam day during the most important part of the entire process -- the time that you're actually taking the test.I've taken many a certification exam over the years, and helped many others prep for theirs. Here are the five things you must do on exam day to maximize your efforts.1. Show up on time. Yeah, I know everyone says that. The testing center wants you there 30 minutes early. So why do so many candidates show up late, or in a rush? If you have a morning exam appointment, take the traffic into accoun (read full article) |
| |
| |
| |
| Category :: Computer Certification Articles |
Author :: Chris Bryant |
| |
| Article Title :: Cisco Certification: How To Become A Truly Valuable CCNA |
| |
| I've been active in the Cisco Certification track for four years, working my way from the CCNA to the coveted Cisco Certified Internetwork Expert title, and during that time I've conducted job interviews and casual conversations with hundreds of CCNAs and CCNA candidates.The CCNA is an exciting beginning to your Cisco career, but just having the certification simply isn't enough. A recruiter or interviewer isn't going to be impressed just with the cert; you've got to have some real-world knowledge to back it up.I've been down that road myself, and sat on both sides of the CCNA job interview table. With that in mind, I'd like to offer to you some tips on becoming a truly va (read full article) |
| |
| |
| |
| Category :: Computer Certification Articles |
Author :: Chris Bryant |
| |
| Article Title :: Cisco Certification: The Joy Of Hex |
| |
| Cisco certification candidates, particularly CCNA candidates, must master binary math. This includes basic conversions, such as binary-to-decimal and decimal-to-binary, as well as more advanced scenarios involving subnetting and VLSM.There’s another conversion that might rear its ugly head on your Cisco exam, though, and that involves hexadecimal numbering.Newcomers to hexadecimal numbering are often confused as to how a letter of the alphabet can possibly represent a number. Worse, they may be intimidated – after all, there must be some incredibly complicated formula involved with representing the decimal 11 with the letter “b”, right?Wrong.The numbe (read full article) |
| |
| |
| |
| Category :: Computer Certification Articles |
Author :: Chris Bryant |
| |
| Article Title :: Cisco Certification: What To Do DURING Your Exam! |
| |
| There are plenty of articles out there about how to prepare for Cisco exams. However, there are also things you can do to increase your chances of success on exam day during the most important part of the entire process -- the time that you're actually taking the test.I've taken many a certification exam over the years, and helped thousands of others prep for theirs. Here are the five things you must do on exam day to maximize your efforts.1. Show up on time. Yes, I know everyone says that. The testing center wants you there 30 minutes early. So why do so many candidates show up late, or in a rush? If you have a morning exam appointment, take the traffic into account. (read full article) |
| |
| |
| |
| Category :: Computer Certification Articles |
Author :: Chris Bryant |
| |
| Article Title :: Cisco Certification: Introduction To ISDN, Part I |
| |
| From the CCNA to the CCIE, ISDN is one of the most important technolgies you'll work with. It's also very common in the field; ISDN is frequently used as a backup connection in case an organization's Frame Relay connections go down. Therefore, it's important to know ISDN basics not only for your particular exam, but for job success.ISDN is used between two Cisco routers that have BRI or PRI interfaces. Basically, with ISDN one of the routers places a phone call to the other router. It is vital to understand not only what causes one router to dial another, but what makes the link go down.Why? Since ISDN is basically a phone call from one router to another, you're getting (read full article) |
| |
| |
| |
| |
| Prev 1 2 3 4 5 [6] 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 Next |
Article Categories
