CCNA 면접 질문과 답변
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Ques 31. What is the role of a DNS (Domain Name System) server?
DNS translates human-readable domain names into IP addresses, facilitating the routing of data on the Internet.
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Ques 32. What is the purpose of the subnet mask in networking?
The subnet mask defines the network and host portions of an IP address. It is used in conjunction with IP addresses for routing and addressing purposes.
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Ques 33. What is OSPF (Open Shortest Path First) and how does it work?
OSPF is a link-state routing protocol that calculates the shortest path to a destination based on a SPF (Shortest Path First) algorithm.
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Ques 34. 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 35. 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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