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Know the top CCNA interview questions and answers for freshers and experienced candidates to prepare for job interviews.

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Know the top CCNA interview questions and answers for freshers and experienced candidates to prepare for job interviews.

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Intermediate / 1 to 5 years experienced level questions & answers

Ques 2

Explain the difference between TCP and UDP.

TCP (Transmission Control Protocol) is connection-oriented, ensuring reliable data delivery. UDP (User Datagram Protocol) is connectionless and provides faster, but less reliable, data transmission.
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Ques 4

What is the difference between a hub, switch, and router?

A hub operates at the physical layer, a switch at the data link layer, and a router at the network layer. Routers connect networks, switches forward data within a network, and hubs broadcast data to all connected devices.
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Ques 7

What is the difference between a collision domain and a broadcast domain?

A collision domain is a network segment where collisions can occur, typically in Ethernet networks. A broadcast domain is a logical division of a network, where broadcasts are confined.
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Ques 9

Explain the concept of QoS (Quality of Service) in networking.

QoS ensures that network traffic is prioritized based on specific criteria, such as bandwidth, latency, and packet loss, to meet performance requirements.
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Ques 10

What is the purpose of ACLs (Access Control Lists) in routing?

ACLs control traffic flow by permitting or denying packets based on defined rules. They are commonly used for security and traffic filtering.
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Ques 12

What is the purpose of the HSRP (Hot Standby Router Protocol)?

HSRP provides high availability by allowing multiple routers to work together in a group, with one router acting as the active router and the others as standby routers.
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Ques 13

What is the purpose of a proxy server in networking?

A proxy server acts as an intermediary between clients and servers, forwarding requests and responses. It is often used for security and caching.
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Ques 15

What is the purpose of the Hubs and Spokes topology in networking?

Hubs and Spokes topology is a network design where multiple remote sites (spokes) are connected to a central site (hub) for efficient communication.
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Ques 16

What is the purpose of SNMP (Simple Network Management Protocol)?

SNMP is used for managing and monitoring network devices. It allows the retrieval of information and the configuration of network components.
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