As we have covered in our previous CCNA blog posts, Cisco has made both the Cisco CCENT 100-101 exam, the ICND2 200-101 exam and the CCNA 200-120 exam quite a bit more difficult than the predecessor versions of each exam. What has happened is Cisco has gone into much more detail on the various CCNA exam topics and really make it a perquisite that you have some hands on experience with Cisco routers and Cisco switches to pass your Cisco certification exams. So let’s look at today’s practice CCNA question and then we will talk about the theory of how to approach the question when you take the exam. Note that these are not actual exam questions but similar to the complex type of questions you might see on a Cisco exam which requires you to understand a topology diagram and be able to read the associated output from it. Then put it all together to understand exam concept.
Please refer to the network topology and the show ip route information below.
How will packets from PC A within the 192.168.1.0/24 LAN be forwarded to PC B on 192.168.4.0/26 LAN?
A. The router will forward packets from R1 to R2 to R4
B. The router will forward packets from R1 to R4
C. The router will forward packets from R1 to R3 to R4
D. The router will forward packets from R1 to R2 to R4 AND from R1 to R3 to R4
Before we provide you the correct answer, let’s review some of the CCNA theory behind the question.
EIGRP uses a composite metric made up of several K values. One of the K values used in determining the metric is the link cost. In this scenario, the routing table shows the route to reach the network 192.168.4.0/26 as: