CCNA Certification
The CCNA Training helps the candidate enhance skills and knowledge in network fundamentals, network access, IP connectivity, IP services, security fundamentals, and automation and programmability.
What does Protocol mean?
Answer: Protocol is defined as the rules that connect two or more devices to transfer information from one device to another. It helps to know how data is being transferred from one network to another network for communication.
What is the OSI reference model?
Answer: OSI is a reference model that tells how information and data are communicated over a network. It is a conceptual framework that understands the relationships of transmission.
What are the different layers of the OSI model?
Answer- Basically, there are seven layers of the OSI model. Each layer has its own functionality in the OSI model.
They are:
• Layer 1 – Physical
• Layer 2 – Data Link Layers
• Layer 3 – Network
• Layer 4 – Transport
• Layer 5 – Session
• Layer 6 – Presentation
• Layer 7- Application
What are Routers?
Answer- Routing is the process of finding the path on which the information or data can pass from the source to its destination. The device by which routing is done is called Routers.
What is the difference between Switch, Routers, and Hub?
Answer- Switch: A Switch is used to receive the signal to create a frame. It forwards the packets between various LAN segments. It is the platform for packet control when the data is sent at a Data Link layer or Network layer of the OSI model. It supports a single broadcast domain and multiple collision domains.
Routers: A router is defined as a networking gateway device that is used to forward data packets to computer networks. A router is connected by at least a single LAN with its IP address or with LAN or WAN. A router supports two broadcast domains.
Hub: In the hub, if anything comes in its port, then it sends it out to the others. It is less expensive and the least complicated. It has a single collision domain and a single broadcast domain.
What is Half-duplex and Full-duplex?
Answer- In half-duplex, the transmission of information or communication is from one direction only.
Define Network Congestion?
Answer- The process in which a network node is carrying more data that can’t be handled on the network, and owing to which loss of packets or information happens on the network node and the receiver can’t receive appropriate information is termed as Network Congestion.
What is the difference between LAN, MAN, and WAN?
Answer- LAN- It is a local area network where computers and network devices are connected with each other, usually within the same area or building. Connections in LAN must be of high speed.
MAN- It is a metropolitan area network where the networks are connected widely within several buildings in the same city.
WAN- It is a wide area network where the networks are limited to one enterprise or organization and can be accessed by the public. It connects several LANs. Connection in WAN is of high speed and expensive too.
Define IP Address
Answer- Internet Protocol (IP Address) is a 32-bits to 128-bits identifier for a device on TCP/IP protocol. The IP address of a device must be uniquely defined for communication.
What is the difference between Unicast, Multicast, Broadcast, and Anycast?
Answer- Unicast: It is the exchange of messages between a single source and a single destination. In Unicast, packets sent from the sender contains the data address of the receiver so that it can go to the receiver directly.
Broadcast: It is the exchange of messages between one sender to all possible multiple receivers. It works only on a local network. Broadcasting of data can’t be done on the public internet due to a massive amount of unrelated and unnecessary data.
Multicast: It is the exchange of messages between one sender and multiple receivers. In multicast, the network settings determine your receiving clients and sort of broadcasting.
Anycast: It is the exchange of messages between one host to another host. It uses TCP and UDP protocols. The copy of each data packet goes to every host that requests it.
What are the different types of networks in CCNA?
Answer-There are two types of network:
• Server-based network
• Peer-to-Peer network
What is PING used for?
Answer-PING is a Packet Internet Groper. It is used to test the reachability of a host on an Internet Protocol (IP) network
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