CCNA 면접 질문과 답변
Ques 16. Explain the concept of CIDR (Classless Inter-Domain Routing).
CIDR is a method of allocating IP addresses and routing IP packets based on variable-length subnet masking, improving the efficiency of address space usage.
Ques 17. What is the purpose of the OSI model?
The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven abstraction layers.
Ques 18. 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.
Ques 19. What is subnetting and why is it used?
Subnetting is the process of dividing a network into sub-networks to improve performance and security. It helps manage IP addresses more efficiently.
Ques 20. What is the purpose of ARP (Address Resolution Protocol)?
ARP is used to map a 32-bit IP address to a MAC address on a local network, allowing communication between devices.
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