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Cisco 공인 네트워크 어소시에이트(CCNA 200-125)

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회차 · 2026-10

How many usable host addresses are in a conventional IPv4 /27 subnet?

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2026-10 회차 · 연습문제 23개와 해설

공식 기출 회차와 구분되는 자체 제작 학습 자료입니다.

The exam code in this catalog entry is retired. This 2026-10 set reviews foundational concepts; it does not claim alignment with a current replacement exam blueprint.

이 페이지의 연습문제 20개

  1. How many usable host addresses are in a conventional IPv4 /27 subnet?

  2. What is the primary purpose of Spanning Tree Protocol in a switched LAN?

  3. Which route is selected first when destination prefixes have different lengths?

  4. In conventional IPv4 subnetting, how many usable host addresses does a /28 subnet provide?

  5. What is the network address of 198.51.100.77/28?

  6. What is the broadcast address of 198.51.100.64/28?

  7. What is the main role of a router's routing table?

  8. Which IPv4 address belongs to a private address range?

  9. Which command family helps test IP reachability using echo requests and replies?

  10. What does traceroute help reveal?

  11. Why must an Ethernet host use the correct subnet mask?

  12. What does a router do to an IPv4 packet's TTL during ordinary forwarding?

  13. Which Ethernet address is a broadcast destination?

  14. Why configure a default gateway on a workstation?

  15. Which transport protocol provides a connection-oriented byte stream?

  16. Which protocol is commonly chosen when an application prefers small independent datagrams without TCP connection setup?

  17. Why can a duplex mismatch cause poor Ethernet performance?

  18. What is the purpose of a VLAN identifier?

  19. Which spanning-tree bridge identifier wins when otherwise compared for root election?

  20. Why should unnecessary switch access ports be administratively disabled?

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