As the Enterprises is migrating towards the controller based architectures, the role and skills are required to evolve of that of a core network engineer and are considered to be vital than ever. So as to prepare for this network transition, the CCNA Routing and Switching certification will not only help you to prepare you with the knowledge of foundational technologies but also going to ensure that you stay relevant with skill sets that are needed for the adoption of next-generation technologies.
Below are some questions and answers which are asked during the Interview of CCNA R&S:
1) What do you mean by Routing?
Routing is the process of finding a path on which the data could be passed from source to destination. Routing is done by the devices called routers, which are network layer devices.
2) What is the function of the Data Link?
The job of the Data Link layer is to check the messages which are sent to the right device. Another function of Data Link is framing.
3) What is the key Benefit of using switches?
When a switch receives a signal, it will create a frame out of the bits that were from that signal. Along with this process, it will also gain access and read the destination address, after which it is going to forward that frame to the appropriate port. This means of data transmission is a very efficient one, instead of broadcasting it on all the ports.
4) When will the network congestion occur?
Network congestion is going to occur when too many users are trying to use the same network bandwidth. This is especially true when we talk about big networks that do not resort to segmentation of the network.
5) What do you mean by Window in networking terms?
A Window refers to the number of segments that would be allowed to send from the source to destination sending an acknowledgment back.
6) Does the bridge divide a network into minor sections?
No, Not really. What a bridge actually does is to take the large chunk of network and filter it, without modifying the size of the network.
7) Which LAN switching method would be used in Cisco Catalyst 5000?
CISCO Catalyst 5000 is going to use the Store and forward switching method. It will store the entire frame to its buffers and performs a CRC check before deciding that whether to forward that data frame or not.
8) What would be the role of the LLC sublayer?
The LLC sublayer stands for the Logical Link Control Sublayer. It could provide optional services to an application developer. One option is to provide the flow control to the Network layer by using stop or start codes. The LLC could also be provided error correction.
9) How does IGRP differ from RIP?
IGRP takes consideration many factors before it decides about the best route to take, such as reliability, bandwidth, MTU and hop count. On the other hand, RIP just relies on the number of hops in order to establish the best route to a network.
10) What are the various memories that are used in a CISCO router?
Various memories that are used in a CISCO router are:
• Flash Memory that stores the Cisco IOS.
• DRAM that stores the configuration file that is being executed
• NVRAM that stores the startup configuration file
Basically, there are much more questions that are answered in the Interview of the CCNA Routing and Switching. If you need to brush up your knowledge more, you need to join a good training center. My personal recommendation would be the SPOTO CCIE Club.