CCNA Interview Questions and Answers in 2021

By Syed Irfan

Last updated on Oct 5 2021

CCNA Interview Questions and Answers in 2021

Top 45 CCNA Interview Questions and Answers in 2021

 

Networking is a very important part of every organization. It helps the organization stay connected with the entire digital world that has taken over the market. The most beneficial network providers globally is Cisco, it provides great quality networking hardware and software. Telecommunication devices from CISCO are very beneficial. A lot of the professionals actually prefer getting the CCNA certification. This is one of the most beneficial certifications in the field of Cisco. It uses these communication devices in the best possible way to allow organizations to experience that functionality out of them. But to get a job with a certification of professional has to clear the interview. The questions in the interview are going to be completely based upon the fundamentals of Cisco and how professional can use these fundamentals to exceed in his career

 

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Basic CCNA Interview Questions and Answers

 

 

  1. What do we understand by routing?

In most simple terms, routing is a path in which the source can transfer a particular data towards its destination. Routing is done with the help of network layer devices, which are called routers

 

  1. What is the use of data link?

The first function of the data link is to have a check-up on the messages that are sent. It ensures that the messages are sent to the right person. The second purpose of the data link layer is the framing of the messages.

 

  1. What are the advantages of personal experience after using switches?

Using a switch is very beneficial for the user. It helps create a frame from all the bits that were received from the particular signal. It helps in gaining access and reading the destination address, which makes delivering data more precise. The switch is considered to be a very efficient means of data transmission.

 

  1. What is a network condition, and when does it occur?

Network congestion is actually a situation in which too many users are trying to fit in the same bandwidth. when too many users use particular network bandwidth, network congestion takes place, which either leads to crashing of the portal

 

  1. What do we refer to as a window in terms of networking?

In terms of networking, a window refers to the complete number of segments sent from the source to the destination.

 

  1. Can a network be divided into smaller sections with the help of a bridge?

The bridge actually has no working changing the size of the network. The primary function of the bridge is filtering all the large networks to make networking more refined. It is really not possible to actually use a bridge to divide the network into smaller sections.

 

  1. What is the LAN switching method that was used in Cisco catalyst 5000?

The LAN switching method used in Cisco catalyst 5000 is the store and forward switching method. The store and forward switching method stores the entire framework, and it helps in performing CRC checks. The CRC checks are performed before making any decision about forwarding the data frame.

 

  1. What is the LLC sublayer, and what is its usage?

LLC is used for logical link control. The usage of LLC sublayer is to provide different optional services to an application designer or developer. The LLC sublayer is one of the most efficient tools that is used in Cisco for error correction. It also helps provide flow control to the entire network layer with the usage of the stop code or the start code.

 

  1. What is the basic difference between RIP and IGRP?

The basic difference between RIP and IGRP is based on what do they rely on. RIP completely relies upon the number of hops so that it can establish the best route to the network. RIP is widely used for network rectification and reduce congestion in the network. But IGRP is a completely functional tool that checks upon all the different factors that affect the network before establishing the network's best route. Different factors and which IGRP Relays are bandwidth, reliability, MTU, and hop count.

 

  1. Name all the different memories that are used in the router of the Cisco.

The different memory is data used in the Cisco router as known as NVRAM. NVRAM help in the storage of the startup configuration file. The last memory is known as DRAM. DRAM helps in the storage of all the configuration files that are executed in the router. The last memory in the Cisco router is known as the flash memory, which helps in the storage of Cisco iOS.

 

  1. What do you understand by bootP?

BootP refers to a protocol. This protocol is used to boot diskless workstations intimately connected to the parent network. The full form of bootP is actually a boot program as it helps in determining the IP addresses to different workstations. Also, it provides the IP address to different server PC is that it is currently using the network.

 

Intermediate CCNA Interview Questions and Answers

 

  1. What are the different uses of the application layer in the process of networking?

The most important communication component that is used in networking is the application layer. The application layer helps in providing different network services by supporting all the communication components of the application. This process is actually beyond the psi reference specifications. application layer makes it very convenient for the usage of networking as it synchronizes the application of the server and the user

 

  1. How would we differentiate between the user mode and the privilege mode?

When a user is using the Cisco router, all the regular tasks are performed with user mode. The user-mode helps in fulfilling a lot of tasks like living systems information, connecting to the different remote devices, and checking up the router's status. When we talk about the privileged mode, we see that includes all the usage of the user-mode, plus it has a lot of other options as well, which is actually considered a privilege. This privilege mode is actually used to make different configurations on the router, such as making tests and debugging.

 

  1. What is 100BaseFX?

In 100BaseFX, hundred refers to the speed of the network, which is 100 Mbps. 100BaseFX is actually an Ethernet that helps in using the fiber optics cable. The fiber optic cable is used at the mean transmission medium in the router, which is only possible with 100BaseFx.

 

  1. How will we differentiate between the full-duplex and half-duplex?

While using the Cisco router on networking, some devices are used, which is the transmission device. In a full-duplex, the transmission device can perform both the tasks efficiently. It can transmit data to the parent network, and It can also receive data simultaneously. A person with the uses of full-duplex experiences great benefits as it functions in a very amazing way to provide a great networking experience. But while using a half-duplex, the transmitting device can either receive or communicate at the same time. The transmission device can't perform both tasks with the help of a half-duplex.

 

  1. What do you understand by MTU?

MTU is used for the maximum transmission unit. MTU actually refers to the maximum packet size of data sent to the destination from the source. The data's maximum packet size is sent in the data line when there is no requirement of fragmentation of data. This means that this is the maximum capacity that can be transmitted in the data line. If this capacity is exceeded, there is a requirement to fragment data to ensure that the data reaches the destination.

 

  1. What is the functional purpose of through LAN switch?

Cut through line is one of the most important features in Cisco. This helps the router in receiving certain data frame. When the router receives all the data, it immediately sends out all the data from networking segments towards the destination address.

 

  1. What do you understand by latency?

In the simplest terms, latency is referred to as a point in time. When we go into details, we understand that light energy is actually the total amount of time that is delayed, which helps measure all the data received from the network frame. It Calculates the total time between the receiving of data and the going back of data towards the network segment.

 

  1. What is the maximum limit in the number of hops while utilizing RIP?

While utilizing RIP, the maximum limit of 15 hop counts. If the limit of 15 hop count limit is exceeded, then the network is actually considered an unreachable network.

 

  1. What do you understand by frame relay?

In the first place, frame relay is actually a WAN protocol. The primary frame relay is to provide a complete connection oriented communication with the help of creating virtual circuits and maintaining those virtual circuits. Frame relay actually has a high-performance rating, for which it is extremely beneficial to operate all the data links and physical layer very easily.

 

  1. Can a Cisco router be configured to router IPX?

The reason command in the Cisco router is 'IPX ROUTER.' This is the initial thing that one has to do to enable IPX routing. Every interface that is actually used in the IPX network has to be configured with a network number. All these interfaces have to be configured by an encapsulation method to configure the Cisco router to router IPX.

 

  1. What are the different IPX access lists?

There are two different types of IPX access lists—known as a standard IPX access list and the extended IPX access list.

 

  1. What are the benefits of VLANS?

The primary benefit of using VLAN is that it helps in creating different collision domains by using groups. It eliminates the usage of physical location, which makes it very beneficial. Establishing a network by different means is only possible by using VLAN.

 

  1. What do we mean by subnetting?

Subnetting is a term that means to create small and networking portals that are easier to access directly from the parrot network. Each small network has its own subnet number, which helps in assigning additional parameters after the process of subnetting.

 

  1. List the different advantages of a layered model in terms of networking.

Using a layered network actually provides a lot of advantages to the user. The primary benefit is that it helps the user to make a lot of changes in one layer without having any changes in the other layers. The specialization is highly increased while using a layered network, which makes networking much faster. Troubleshooting the problems is more efficient with a lead network in comparison to the conventional network.

 

  1. Why is the UDP lease preferred by a lot of users in comparison to TCP?

UDP lease is favored by a lot of people as it is completely unreliable and unsequenced. UDP actually does not have the capability to establish virtual circuits. This makes networking more convenient for a lot of users.

 

  1. The presentation layer supports a few standards. What are those standards?

The presentation layer actually supports many standards. This helps in ensuring that all the data is actually presented in a very accurate way. In detail, the presentation layer supports PICT, TIFF, JPG, MIDI, MPEG, and a lot more.

 

  1. What is the easiest method by which a router can be configured?

Many users actually prefer configuring the router in a very remote way. The easiest way to configure a router at the convenience of the user is by the usage of the Cisco autoinstall procedure. It is extremely is it actually configure the router in a very convenient way, but it is also important to connect the router to a WAN or LAN.

 

  1. What is actually displayed in the show protocol?

The show protocol actually displays all the routed protocols that are completely configured on that particular router. And it also displays the address of the network which is assigned to each interface.

 

  1. How can IP addresses be depicted?

It is very easy to depict an IP address with the usage of dotted decimal binary code for hexadecimal. These are the three significant ways through which it is extremely easy to depict an IP address.

 

Advanced CCNA Interview Questions and Answers

 

  1. How can a user shift to the privilege mode from the user mode, and how to get back to the user-mode?

It is extremely easy for a user who is currently in the user mode to shift to the privilege mode. The privilege provides the users with a lot of benefits for which many people switching to the privilege mode. Switch to the privilege for all the users has to do is to command enable when the system is asking for the prompt. But you have to get back to the user-mode. The procedure is the same. All they have to do is to enter the disable command.

 

  1. What do you understand by HDLC?

HDLC is the acronym that is used for high-level data link control protocol. This is one of the most functional features that are available in Cisco networking as it is one of the most priority protocols which is provided by Cisco. Usage of HDLC is so important that it is actually a default encapsulation that is actually operated within each and every Cisco router in the world.

 

  1. What is internetwork, and how are they created in Cisco?

The internetwork is actually one of the ways in which different networks collector with the use of some third party device are also known as intermediate devices. These devices can either be a router or a gateway device. An internetwork and we created with the help of these intermediate devices as a router. When the network administrator actually provides a proper networking address which can be connected to the router.

 

  1. What is the meaning of bandwidth? 

Bandwidth actually refers to the entire transmission capacity of the intermediate device. Intermediate device very important rule of connecting the network with the devices that are used by the user. The entire capacity of the network which device can handle is referred to as the bandwidth. The bandwidth is measured in kbps and is actually measure what volume of data can be an intermediate device handle.

 

  1. What is the function of hold-down?

The hold-downs are a very important feature in the world of Cisco. The primary use of old towns is prevention. It helps in preventing these messages from reinstating a probable link in the network which is used by the user. This does not create any inconvenience while using networking, which is one of the most appreciated features of Cisco.

 

  1. What do we refer to as packets?

Data encapsulation is a very important step in the world of Cisco. The result of the data encapsulation is actually a packet. Referred to as datagrams that contain data that has been different protocols of the OSI layer.

 

  1. What is the meaning of segments?

The data streams which are actually a product of upper OSI is called a segment. The segment is such a form of a data sim which is completely ready for the transmission process towards the network. What is the logical unit charge? The transport layer is actually the segments that make up the unit?

 

  1. What are the different benefits of LAN switching

LAN switching is one of the most functional steps with every user who uses networking should prefer. It provides the user with a variety of benefits that are useful and can provide the user with great functional value. The first benefit of LAN switching is that it enables a user to experience full-duplex data transmission Vendita reception. It also helps the user in media rate adoption m. Using a LAN switch is very easy and is considered to be a very efficient migration process.

 

  1. What do we mean by route poisoning?

The very simple meaning of route poisoning face making the network unreachable. Route poisoning is an actually complete process where the data entry of 16 is entered in a route which makes the root completely invisible. this is a very healthy advisable step which is provided to a lot of people who use networking which allows the users to prevent several problems in the route

 

  1. How can someone find valid hosts in a subnet?

Finding a valid host in a subnet is very easy. Any user who uses a route or networking can easily find a valid host by simply subtracting the subnet Mask from 256. it is considered to be one of the most convenient and accurate ways in which the valid host could be found which exists between the subnet.

 

  1. What do we mean by DLCI?

DLCI is used for the data-link connection identifier. It is a very crucial part of school as it helps the users to have very convenient networking. The primary role of data links connection identifier to help the user in the identification of virtual circuits that currently exist in the network. The detailing connection identifiers are most likely assigned by a frame relay service provider.

 

  1. There are certain conversion steps in data encapsulation. Explain those steps

Data encapsulation is a very crucial step in the entire process of networking. When we talk about data encapsulation from the point of view of a transmitter, the entire data breach to be transformed his first converted into segments. Segmentation is a very crucial part, as it is the Grass root level steps that help in establishing a strong network. These segments are then formed into a packet or datagrams when they are passed on to the next layer. The packets actually come from different segments of data, which are to be transformed in the data wire. Different packets are then put together and formed as frames. When friends are formed, there are fast on the network interface. tell the final step when the network interfaces passed off the phone after being converted into bits prior. This is a very important step in the process of networking by different styles put together to form a uniform big collection of data which can be transmitted with the help of the data wires.

 

  1. Name the different types of passwords that can be set in a Cisco router.

Cisco router has different types of passwords. Total five types of the password which Allow the network to enable secret, the virtual terminal, console, and auxiliary.

 

  1. Is network segmentation a good step while dealing with a large network?

Network segmentation is very beneficial when actually a user is managing a large network. It helps in the reduction of network congestion and network traffic, which makes using a particular network very beneficial and convenient.

 

  1. What are the different ways to gain access to a router?

The router can be accessed in three different ways, which is the usage of Telnet, AUX, and Console

 

These are the top 45 CCNA interview questions. This CCNA interview questions list is made after understanding the knowledge and skills which are expected to be present in a professional who has the CCNA certification.

 

For info about CCNA Training, chat with our course expert. We offer training for CCNA aspirants and training for other popular cybersecurity certifications in online, live-online, and classroom modes of study.

 

About the Author

Sprintzeal   Syed Irfan

Content Writer with Experience in Creating Content for IT Networking and Other Popular Domains.

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