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OSI and TCP/IP Models Flashcards

6 cards from real CCST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which OSI layer manages sessions between applications?

    Answer: Session (Layer 5)

    The Session Layer (Layer 5) manages communication sessions including setup, maintenance, and teardown.

  2. At which TCP/IP model layer does HTTP operate?

    Answer: Application

    HTTP operates at the Application layer, which combines OSI layers 5-7.

  3. What is the primary function of the Presentation Layer (Layer 6)?

    Answer: To translate data formats, handle encryption, and compress data

    The Presentation Layer translates between application format and network format, handling encoding, encryption, and compression.

  4. Which PDU is associated with the Transport Layer?

    Answer: Segments

    The Transport Layer uses segments (TCP) or datagrams (UDP) as its PDU.

  5. How does the TCP/IP model differ from the OSI model?

    Answer: TCP/IP has 4 layers mapping to OSI's 7, combining several layers

    TCP/IP has 4 layers: Application (= OSI 5-7), Transport (= OSI 4), Internet (= OSI 3), Network Access (= OSI 1-2).

  6. Which Network Layer protocol handles error reporting and diagnostics?

    Answer: ICMP

    ICMP provides error reporting (destination unreachable) and diagnostics (ping, traceroute) at Layer 3.