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Last updated on Nov 18, 2023
Cisco Systems' CCNA (Cisco Certified Network Associate) certification is a popular qualification for computer network engineers. Entry-level network engineers, network administrators, network support engineers, and network specialists are all eligible to take the exam. It is beneficial to become acquainted with a wide range of networking principles, such as OSI models, IP addressing, network security, and so on.
In this article, you can go through the set of CCNA interview questions most frequently asked in the interview panel. This will help you crack the interview as the topmost industry experts curate these at HKR training.
Let us have a quick review of the CCNA interview questions.
Ans: It is the responsibility of the Data Link layer to ensure that messages are delivered to the relevant device. Framing is another function of this layer.
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Ans: Logical Link Control is the acronym for the LLC sublayer. It can give an application developer optional services. One way is to use stop/start codes to offer flow control to the Network layer. Error correction is another service that the LLC can provide.
Ans: The first step is to use the "IPX routing" command to enable IPX routing. After that, a network number and encapsulation mechanism are assigned to each IPX network interface.
Ans: The following are three different types of cables that are used:
Ans: Frame Relay is a WAN technology that creates and maintains virtual circuits to facilitate connection-oriented communication. It operates at the Data Link and Physical Layers and has a high-performance rating.
Ans: IPX access lists are classified into two types.
Only the source or destination IP address can be filtered using a standard Access List. When filtering a network, an Extended Access List uses the source and destination IP addresses, port, socket, and protocol.
Ans: Ranges for private IP are
Ans: OSPF is an acronym for Open Shortest Path First. It is a link-state routing protocol that employs the Dijkstra algorithm to connect to a wide number of networks with no restriction on the number of hops.
Ans: EIGRP protocol consists of
Ans: The IEEE standard defines it as a method of supplying electric power to network devices via an existing data connection.
Ans: PING is an acronym for Packet Internet Groper. It is used to determine whether a host is reachable via an Internet Protocol (IP) network. When data is delivered over the network using IP addresses, the receiver will PING the sender to receive the data.
Ans: Poisoning a route is the process of making it unreachable by inserting a table entry of 16 into it. This is done to avoid issues with route updates being inconsistent.
Ans: There are three methods for transferring data:
Ans: The Address Resolution Protocol (ARP) is a protocol that maps an IP address to a physical machine.
Reverse Address Resolution Protocol (RARP) is a protocol that maps a MAC address to an IP address.
Ans: It might be a single network or a collection of networks controlled by a single directive. It's known as an Autonomous System Number, and it's specified by a unique number or code (ASN). It is also referred to as a routing domain.
Interior Gateway Protocol (IGP) is used to communicate between networks within an AS.
Ans: It's a set of elements arranged in a precise order.
Topology can be divided into several types:
Ans: The following are the various types of memory that are used:
Ans: The following parameters are verified during configuring:
Ans: In local area networking, Carrier Sense Multiple Access with Collision detection (CSMA/CD) is a media access control method. When a collision happens, it uses early Ethernet technology to overcome it.
In the wireless network, Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) is utilized to avoid collisions.
Ans: Segmenting a network can help a network administrator minimize network traffic while simultaneously guaranteeing that all users have access to high bandwidth. This results in improved performance, which is particularly important for a developing network.
Ans: VTP is an acronym for Virtual Trunk Protocol. The VTP types are:
Ans: ACL is an acronym for Access Control List. It's a set of commands that a router uses to filter packets. The ACL types are as follows:
Ans: The following is the range of public IP addresses:
Ans: VLANs enable groups other than physical location to create collision domains. VLANs can be used to create networks based on a variety of criteria, including function, hardware type, and protocol, among others. When opposed to traditional LANs, where collision domains are always related to a physical location, this is a significant advantage.
Ans: The sender's information, the recipient's information, and the data contained in a data packet make up a data packet. It also includes a numeric identification number that identifies the packet and order number. When data is transferred across the network, it is segmented into data packets. In a brief, data packets include the information and routing configuration for the message you're sending.
Ans: At the data link layer, a broadcast domain is a logical division of a computer network in which all nodes can communicate with each other through broadcast.
A collision domain is a network segment where data packets can collide while being sent over a common medium or through repeaters.
Ans: There are five classes of IP addresses:
Ans: In Local Area Networks, LAN switching is a type of packet switching. It's an essential component of most networks because it helps to boost LAN efficiency and addresses the existing bandwidth problems. It allows several users to communicate with one another directly. A system of simultaneous point-to-point connections between pairs of devices is created through LAN switching. It offers a collision-free network and also high-speed connectivity.
Ans: LAN Switching has the following advantages:
Ans: When a switch receives a signal, it constructs a frame using the signal's bits. It acquires access and reads the destination address using this method, following which it sends the frame to the proper port. Instead of broadcasting data across all ports, this is an extremely efficient method of data transmission.
Ans: The Store-and-forward switching method is used by the CISCO Catalyst 5000. Before selecting whether or not to forward the data frame, it saves the full frame to its buffers and runs a CRC check.
Ans: A bit rate is the total number of bits transferred in one second, whereas a baud rate is the number of signal units per second needed to represent those bits.
Baud rate=bit rate / N, where N = Each signal shift represents a number of bits.
Ans: Data from the end-user is translated to segments from the perspective of a data transmitter. After that, segments are transferred to the subsequent tiers, where they are transformed into packets or datagrams. Before being sent to the network interface, these packets are transformed into frames. Finally, before data transfer, frames are transformed to bits.
Ans: The data encapsulation conversion steps include:
Ans: CDP is an acronym for Cisco Discovery Protocol. It's a Layer 2 proprietary protocol that only Cisco routers and switches support. This protocol gathers data from devices that are directly connected.
It finds neighboring devices, determines how they're set up, and allows the systems to learn about one another through various network-layer protocols. CDP makes it easier to manage an accurate inventory of Cisco network devices.
Ans: The following information is discovered by the CDP:
Ans: The HDLC protocol stands for High-Level Data-Link Control. It's a widely used ISO-standard bit-oriented Data Link layer protocol for data transmission. It can be used for both point-to-point and point-to-multipoint networking.
HDLC divides data into frames, allowing devices to control the flow of data. The frame is sent over the network to its intended destination, which checks that it is successfully received.
Ans: The following are some of the advantages of HDLC:
Ans: There are five different kinds of passwords that can be used to secure a CISCO router:
Ans: The following are the distinctions between User Mode and Privileged Mode:
User Mode
Privileged Mode
Ans: The loopback address is set to 127.0.0.1. A loopback address is a unique IP address that allows a network administrator to treat a local system as if it were a remote machine. Local testing is also done with it. On the loopback network, every traffic sent by a computer application is directed to the same computer.
Ans: On some ports, the switch does not communicate. They may be monitored and vlans taxis established. They are speedy and can store MAC addresses. They also don't separate the speed on each port. The main advantage of using switches is that each switch port has its impact area, which eliminates the possibility of casing crashes. It advances the bundles based on the destination address, obviating the need for parcels to be sent to all ports as well as center points.
Ans: A checksum is a blunder discovery approach in which the transmitter calculates a numerical reward based on the number of set or unconnected bits in a message and sends it along with each message outline. A similar checksum work (recipe) is connected to the message edge at the collector end to retrieve the numerical esteem. If the received checksum esteem matches the provided esteem, the communication is considered successful and error-free. A hash total is another name for a checksum.
Ans: Disseminated information handling is a PC organizing technique in which multiple PCs from diverse locations share PC processing capabilities. This isn't a solitary, centralized server that oversees and manages all associated frameworks. PCs that involve the appropriated information handling system are situated at various areas yet interconnected by methods for remote or satellite.
Ans: The TCP/IP Layer in the OSI is largely used to transport packets from one machine to another through seven layers. The seven sorts of layers are as follows:
Ans: The following are the benefits of static routing, RIP, EIGRP, and OSPF:
Ans:
Hub
A single broadcast domain and collision domain exist in the hub. Anything that enters one port is forwarded to the others.
Switch
It's a filtering and forwarding device for packets among LAN segments. A single broadcast domain and multiple collision domains are present on switches. It works at the data connection layer 2 and layer 3 and supports any packet protocol.
Router
A router is a device that sends data packets through a network.
Ans:
LAN: It's a type of local area network in which computers and network devices are linked together, usually within a single room or building. LAN connections must be fast. For instance, Ethernet.
MAN: It is a metropolitan area network in which multiple buildings in the same city are connected. For instance, the IUB Network.
WAN: It is a type of wide-area network in which the networks are restricted to a single company or organization but can be accessed by the general public. It connects a number of LANs.The WAN connection is both fast and expensive. For instance, the Internet.
Ans:
Unicast: It is the transmission of data from a single source to a single destination. In Unicast, packets transmitted from the sender include the receiver's data address, allowing them to be sent directly to the receiver.
Broadcast: It is the transmission of communications from one sender to as many receivers as feasible. It can only be used on a local network. Due to a large amount of unrelated and unneeded data on the public internet, data broadcasting is not possible.
Multicast: It is the sending and receiving of messages between a single sender and multiple recipients. Your receiving clients and the type of broadcasting are determined by the network settings in multicast.
Anycast: It is the transmission of data from one host to another. TCP and UDP protocols are used. Every host that requests it receives a copy of each data packet.
Ans: OSPF creates a default only if it is configured with the default-data begin direction and if there is a default configuration in the case from another process. OSPF's default course is 0.0.0.0. Use the direction default-data start consistently if you require an OSPF-empowered switch to generate a default course even if it doesn't have a default.
These interview questions and answers will assist anyone in successfully clearing a CCNA interview, whether they are fresher or experienced. And these are the interview's most commonly asked questions and responses. We hope that this article has given you a better understanding of the fundamentals and advanced principles of networking.
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