Top 70 CCNA Interview Questions & Answers Routing is done by a device called routers, which are network layer devices .. Download PDF. The most preferred certifications in networking are CCNA, CCNP from Cisco Systems, USA. CCNA (Cisco Certified Network Associate) is an online exam which deals with networking concepts like IPv4, IPv6, routers and switches. Apart from getting jobs in networking, CCNA Certification. Networking Basic & Ccna Interview Questions and Answers for Freshers - Free download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online .
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CCNA Interview Questions | Advanced CCNA Technical Topics | For freshers & Professionals | Free What is the purpose of each part of a network address?. + Ccna Interview Questions and Answers, Question1: What is a node? Question2: What is the purpose of the Data Link? Question3: When does network . Engineers with a background in networking are highly considered in the IT Industry and acquiring Download CCNA Interview Questions PDF.
Its response time is less as distance has to cover less. Protocols is basically a set of rules that is required to be followed by a network for communication. It provides the standards that a network should have to follow while communicating to another network. File Transfer protocol FTP is special protocol used to exchange the files from a computer to internet.
It is most commonly used to upload a file or image, and also applied while downloading the pdf and other files or images from internet. POP3 is before using mail server in which all mail should be downloaded first if signed in with different PC. This focuses on sending and receiving the messages to increment interoperability, flexibility, and performance of application.
It reduces the development complexity which spans multiple OS and network protocols. Seven OSI layers are: Give some components name that is used in Physical Layer? All physical components of network are work at Physical layer such like Hub, Router, Switch, Communication Cables, etc. Multicasting gives the facility to send single message different recipients such like email, teleconferencing. In this some standards are used and network infrastructure.
By PING service we also get some other information like packets lost information, sent packets or received. Physical layer, Data link layer, network layer are the network support layer and Session layer, presentation layer and application layer are the User support layers. In networking pipelining is defined as the process in which a task starts before the previous task ends. These above questions will help the fresher candidates and give them a good knowledge of networking basic questioning that can be asked in their Interviews.
Which layer of OSI model I responsible for reliable connections? The transport layer is responsible for reliable connection. Ques 2: What is the main difference between acknowledgement and handshaking? Acknowledgement is just a message which convey the sender that receiver received the data successfully. Handshaking is used to convey the properties of the connection that is being established.
Ques 3: When does the congestion occur? Network congestion is occurred due to accessing of same bandwidth by many users at the same time and there is no alternative to network segmentation.
Ques 4: What is routing? Routing is process of finding the shortest path for communicating from source to destination. This process is accomplished by the routers on network. Ques 5: What is window in networking terms? A window is sets of segment that is allowed to be sent from source to destination before the acknowledgement is sent back to it. Ques 6: What is VLAN? Ques 7: What is sub-Netting?
Why it is used? It is used to break the larger network into smaller sub-networks, used in IP Networks. Basically used for minimizing the network traffic, optimizing the performance, and managing the network. Ques 8: What is communication and how it is differ to transmission? Communication means exchanging of data between source and destination. Whereas, transmission refers to only transferring of data from source to receiver.
Ques 9: Two interface of the router is configured with IP addresses Would the routing table of the router contain any information? Provide explanations Ans. The router would have to perform AND operation with IP address and subnet mask when the interface has configured. This is ultimately yield a network address and after it configured to interface, two entries will available in the routing tables which are Ques Does bridge divide a network into smaller segments?
No, it not, it only filters the large networks without changing their size. What is the role of LLC sub layer?
Logical Link Control sub layer provides the controlled or optional services to the Network layer with start and stop codes.
It also does the error correction. A method to standardize and categorize fault tolerance disk systems. Some servers use the three RAID: List the two types of transmission technology? Point-to-point and broadcast transmission technologies are available in the CCNA. What is point-to-point transmission protocol?
It is an industry standard in which the exchange of multiport datagrams is done use of protocol that is providing point-to-point link. What are the possible ways of data exchange? There are only three types of possible ways to exchange data i. Simplex, Half-duplex and full- duplex. What is the difference between Baseband and Broadband? If the transmission is on baseband, the entire of the cable is consumed by the single signal. Whereas, in in broadband transmission, signals are sent on multiple frequencies, allowing multiple signals to be sent simultaneously.
In TCP protocol reliable transmission is done. Difference between public IP and private IP? Public IP should be unique address that is assigned to a company. Private address can be used by anyone on private network because it is not recognized by the internet.
What is latency? Latency is the time duration that is measured from the point of time which a device receives a data frame to the time it sends out again towards another network segment. What is frame relay?
Frame Relay is a WAN protocol that delivers connection-oriented communication by implementing and retaining virtual circuits. It has a high performance rating and operates at the Data Link and Physical Layers. Explain difference between Router, Switch and Hub?
A hub is typically the least expensive, least intelligent, and least complicated of the three. Its job is very simple anything that comes in one port is sent out to the others.
Hub has single collision domain and single broadcast domain Switch: Switch is a device that filters and forwards packets between LAN segments.
Switches operate at the data link layer layer 2 and sometimes the network layer layer 3 of the OSI Reference Model and therefore support any packet protocol. Switches have multiple collision domains and have a single broadcast domain. Explain broadcast and collision domain? A broadcast domain is a logical division of a computer network, in which all nodes can reach each other by broadcast at the data link layer.
A collision domain is a section of a network where data packets can collide with one another when being sent on a shared medium or through repeaters. What is the range of class A address? Question 5. The Application Layer supports the communication components of an application and provides network services to application processes that span beyond the OSI reference model specifications.
It also synchronizes applications on the server and client. Question 7. The maximum limit is 15 hop counts. Anything higher than 15 indicates that the network is considered unreachable. Question 8. The show protocols command shows the global and interface-specific status of any configured Level 3 protocol.
Question 9. What Is As autonomous System? A group of devices under a single administration is called an AS. Question Erase startup-config is the command to delete preconfigured files on the router. Service Password Encryption command encrypts plain text password into type 7 password.
These are not very much secure and can be easily decrypted. What Is Dhcp Scope? What Is Round Trip Time? RTT is the propagation time between two nodes. It is the time taken to send a packet out of the interface and receiving the acknowledgement. Although both are the communication devices and both are used to transmit and receive data but full-duplex facilitate you to transmit and receive data at the same time while half-duplex cannot receive while it is transmitting data.
What Does Mtu Stand For? MTU determines the maximum size of a packet that is sent across the network. You can increase MTUs across the network, but this setting generally slows down the network compared to smaller MTU settings. Broadcast domain is a domain where if a broadcast frame is forwarded, every device pays attention and receives the data.
While in Collision domain, chances of data collision is maximum. Like in Hub, if two or more send traffic at the same time, data will collide in between and none of the devices will receive the data.
It should include subnet mask of each destination address. What Is Subnet? Why Is It Used?
Subnets are used in IP network to break up larger network into smaller network. It is used to optimize the performance of network because it reduces traffic by breaking the larger network into smaller networks.
It is also used to identify and isolate network's problem and simplify them. What Is Network Latency? Network latency refers to the performance of one device when it communicates with another. Network latency is affected by bandwidth speeds, network card performance, cabling and congestion.
What Is Poe power Over Ethernet? POE allows electrical current to be carried by the cable rather than the power cords. It minimizes the number of wires required to install the network. There are five types of passwords can be set on a Cisco router: It is a media access control method used in local area networking using early Ethernet technology to overcome the occurred collision.
It is used in wireless network to avoid collision. These two modes are somewhat self-explanatory. The user mode allows the user to view router status and basic system information.
With privileged mode access status, the router can be configured and all status messages and errors can be viewed.
IPv4 is a 32 bits address and IPv6 is bits address. ARP is a protocol that is used to map an IP address to a physical machine address. Straight cable: Straight cable is used to connect different group devices.
For example: Switch- Router. Cross cable: Cross cable is used to connect same group devices. When you send traffic on a network, the router default gateway in Windows computer terminology determines how to route the traffic. Each router is considered a hop. With IGRP, several more factors are considered. What Is Checksum? A checksum is a count of the number of bits in a transmission data that is included with the data so that the receiver can check to see whether the same number of bits arrived.
These are the three possible ways of data transmission: These are the two major types of networks: What Are Data Packets? Data packets are the encapsulation units that transmit information across a network.
It also contains the numeric identification number that defines the order and packet number. When you send data across the network, that information is segmented into data packets. The recipient then puts these packets together to be able to read the information. Basically, data packets contain the information and routing configurations for your transferred message.
What Is Gateway-to-gateway Protocol? Gateway-to-Gateway protocol is now obsolete. This was being used for routing datagrams between internet gateways.