Three Key Lessons of CCNA
There are different lessons in Cisco CCNA Certification. Network
engineers need to learn these lessons and pass CCNA 200-301 exam. To do this,
after learning each CCNA lesson, they should practice with different questions
and answers with a CCNA practice test. In this article, we will talk about key four
lessons of Cisco CCNA certification. These lessons are the foundation lessons
of Cisco CCNA certification.
OSI Model
OSI Reference model is one of the most important beginner lessons of an
entry level network certification. This model summarizes the network concepts
and protocols. We can understand the level of networking with OSI model.
There are seven layers in OSI model. These are:
·
Application
Layer
·
Presentation
Layer
·
Session
Layer
·
Transport
Layer
·
Network
Layer
·
Data-Link
Layer
·
Physical
Layer
You learn the protocols of each layer and the concepts of this layers. For
example, in physical layer, you learn network cabling. Basically, osi
model is the summary of networking. But beside OSI model, there is also another
model named TCP/IP model.
TCP/IP Model
Tcpip model is the
second model used in networking. Basically, it has 4 layers before but at the
recent model it has 5 layers. These layers are similar to OSI model but with a
difference. In tcpip model, the last three layers are combined in one
application layer. So what are the layers of tcpip model? These are:
·
Application
Layer
·
Transport
Layer
·
Internet
Layer
·
Data-Link
Layer
·
Physical
Layer
Recently, tcpip model is more popular than osi model. Even in CCNA
200-301 exam, tcpip model is covered. Some parts are very similar to osi model.
For example, in physical layer, network cabling is done also in tcpip
model.
Interior Gateway Protocols
There are various network protocols used in networking world. One of the
most important ones are interior gateway protocols. Cisco CCNA
certification and other network certifications covers these routing protocols
in certification lessons. So, what are these interior gateway protocols? These
are given below:
·
RIP
·
OSPF
·
EIGRP
·
IS-IS
All these protocols are used as interior gateway protocols (IGPs). In
CCNA certification course, there are special lesson for each of these protocols
but as an overview, interior gateway protocols are covered. So, we can separate
this overview as a one lesson.
CCNA Practice Test
After learning these lessons, it is important to practice on these
lessons. There are many network questions and answers on these lessons. So, you
can use a CCNA practice test to practice on these lessons. Cisco CCNA
200-301 needs more practice on different questions. If you solve different
questions, you can pass your exam easily. Beside solving different questions
will prepare you to real life networking. You can be more experienced in your
real network job if you solve CCNA practice Test. As a network engineer, you
will be familiar with different scenarios and different network concepts with
these questions.
CCNA practice test
coverS not only these three lessons, osi model, tcpip model and interior
gateway protocols, But the other required lessons in CCNA 200-301 exam like network
cabling. So, you can practice on all the course content with these
questions and answers.
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