|
Home::Computer Certification
Cisco CCNP / BSCI Certification: Introduction To ISIS Terminology
Author : Chris Bryant, CCIE #12933
When you're studying to pass the BSCI exam and earn your CCNP certification, you're going to be introduced to ISIS. ISIS and OSPF are both link-state protocols, but ISIS works quite differently from OSPF. You must master these details in order to earn your CCNP.
One of the major differences between OSPF and ISIS will be evident to you when you first begin your BSCI exam studies, and that is the terminology. ISIS uses terms that no other protocol you've studied to date uses, and learning these new terms is the first step to BSCI and CCNP exam success.
First off, what does "IS" stand for in "ISIS"? It stands for "Intermediate System", which sounds like a group of routers. As opposed to Autonomous Systems, which are logical groups of routers, an Intermediate System is simply a single router. That's it.
You'll also become familiar with End Systems, referred to in ISIS as an "ES". The End System is simply an end host.
ISIS and OSPF both use the concept of areas, but ISIS takes a different approach to this concept. ISIS routers use three different types of routing levels, according to the area a router has been placed in. Level 2 routers are connected only to the backbone and serve as a transit device between non-backbone areas. Level 1 routers are totally internal to a non-backbone area.
ISIS uses both Level-1 and Level-2 Hellos, meaning that the two types of routers just mentioned cannot form an adjacency. Luckily for us, there is a middle ground, and that is the Level 1-2 router. These routers connect non-backbone areas to backbone areas. L1-L2 routers keep two separate routing tables, one for L1 routing and another for L2 routing. This is the default setting for a Cisco router, and L1-L2 routers can form adjacencies with both L1 and L2 routers.
Part of the challenge of learning ISIS is getting used to the differences between ISIS and OSPF. Keep studying the terminology, master one concept at a time, and soon you'll be a master of ISIS and a CCNP to boot!
Article Source: http://www.articledashboard.com
Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage (www.thebryantadvantage.com), home of free http://www.thebryantadvantage.com/">CCNA and http://www.thebryantadvantage.com/ccnpstorebsci.htm">CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. Video courses and training, binary and subnetting help, and corporate training are also available. Pass the http://www.thebryantadvantage.com/UltimateCCNAStudyPackage.html">CCNA exam and http://www.thebryantadvantage.com/ccnpstorebsci.htm">BSCI exam with Chris Bryant, CCIE #12933!
For a copy of his FREE ebooks, “How To Pass The CCNA” and “How To Pass The CCNP”, visit the website and download your copies! Get your http://www.thebryantadvantage.com/">CCNP certification with The Bryant Advantage!
Spam emails More free articles Related articles
|
More related feeds |
Cisco CCNP BSCI Certification Introduction To ISIS Terminology
When you're studying to transfer the BSCI communicating and acquire your CCNP certification, you're feat to be introduced to ISIS. ISIS and OSPF are both link-state protocols, but ISIS entireness quite differently from OSPF. ...Cisco CCNP BSCI Certification Introduction To ISIS Terminology
When you're studying to pass the BSCI exam and earn your CCNP certification, you're going to be introduced to ISIS. ISIS and OSPF are both link-state protocols, but ISIS works quite differently from OSPF. You must master these details ... Cisco CCNP / BSCI Exam Tutorial: 10 ISIS Details You Must Know!
Earning your CCNP certification and passing the BSCI exam depends on knowing the details of many Cisco technologies, ISIS chief among them. To help you prepare for exam success, here's a list of ISIS terminology and basic concepts that ... Just Answers: Cisco CCNP BSCI Certification Introduction To ISIS ...
n you re going to be introduced to ISIS. ISIS and OSPF are both link state protocols but ISIS works quite differently from OSPF. You must master these details in order to earn your CCNP. Part of the challenge of learning ISIS is getting ... Wiki Articles: Cisco CCNP BSCI Certification Introduction To ISIS ...
S and OSPF are both link state protocols but ISIS works quite differently from OSPF. You must master these details in order to earn your CCNP. Part of the challenge of learning ISIS is getting used to the differences between ISIS and ... Cisco CCNA, CCENT, CCNP, And CompTIA Questions: HSRP, OSPF Cost ...
Answer: B, E. In addition to the source port and destination port numbers, the UDP and TCP headers also have a checksum field in common. CCNP Certification / BSCI Exam: In ISIS, what is the most efficient point of a network at which to ... Cisco CCNP - BSCI Certification: Introduction To ISIS Terminology
When you're studying to pass the BSCI exam and earn your CCNP certification, you're going to be introduced to ISIS. ISIS and OSPF are both link-state protocols, but ISIS works quite differ.
|
|
|
