CCNA 200-301 Practice Test

200-301 practice test: what's covered

• CCNA 200-301 v1.1

Free 200-301 sample questions

1. A user reports that a file transfer keeps losing packets, yet the application still receives every byte intact and in order. Which TWO functions of the OSI Transport layer make this reliable delivery possible? (Choose TWO)

   • A. Acknowledgements with windowing (flow control)
   • B. Sequencing and retransmission of lost segments
   • C. Routing packets between different IP subnets
   • D. Framing and MAC addressing on the local link
   • E. Encoding bits onto the physical medium
   Show answer

   Correct: A and B. TCP reliability uses acknowledgements with windowing plus sequencing and retransmission of lost segments. Routing is a Layer 3 function, framing and MAC addressing are Layer 2, and bit encoding is Layer 1, so those are not Transport-layer reliability functions and are incorrect.

2. A technician plugs two PCs into the same device and sees that frames are forwarded only out the port toward the destination MAC, not flooded everywhere. Which device is forwarding based on a MAC address table at OSI Layer 2?

   • A. A router doing L3 forwarding
   • B. A LAN switch
   • C. A standalone repeater hub
   • D. A DNS server appliance
   Show answer

   Correct: B. A switch builds a MAC address table and forwards unicast frames out only the port toward the destination, which matches the observed behavior at Layer 2. A router forwards by IP at L3, not MAC; a hub floods all ports because it has no table, and a DNS server is not a forwarding device at all.

3. You are documenting the addressing plan for the subnet 192.168.10.0/26 and must record the directed broadcast address that hosts use to reach all stations in that subnet. Which address is correct?

   • A. 192.168.10.31
   • B. 192.168.10.63
   • C. 192.168.10.127
   • D. 192.168.10.255
   Show answer

   Correct: B. A /26 mask yields blocks of 64 addresses, so the first subnet spans .0 through .63 and its broadcast is .63. The value .31 belongs to a /27 boundary, not /26; .127 and .255 fall in later /26 blocks and are therefore incorrect for the .0 subnet.

4. A /29 is assigned to a LAN segment. How many usable host addresses does that prefix provide?

   • A. Exactly 6 hosts
   • B. Exactly 8 hosts
   • C. Exactly 14 hosts
   • D. Exactly 30 hosts
   Show answer

   Correct: A. A /29 contains 8 total addresses, and after removing the network and broadcast addresses 6 usable host addresses remain. The value 8 ignores the two reserved addresses, while 14 corresponds to a /28 and 30 corresponds to a /27, so those masks are larger than required and incorrect.

5. While capturing IPv6 traffic on a freshly booted host, you notice an address that is automatically generated, never routed off-link, and used for neighbor discovery. Which IPv6 prefix identifies this address type?

   • A. FE80::/10 link-local
   • B. FF00::/8 multicast
   • C. FC00::/7 unique local
   • D. 2000::/3 global unicast
   Show answer

   Correct: A. Link-local addresses use the FE80::/10 prefix, are auto-configured on every interface, and are confined to the local link for functions like neighbor discovery. FF00::/8 is multicast and FC00::/7 is private unique-local, while 2000::/3 is globally routable, so none of those is correct for an unrouted on-link address because they are not link-local.

Last updated: 2026-10-19

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