Continue your lesson
Tie every forwarding decision to interface state, Layer 2 state, addressing, routing, and policy.
Block 1 of 1Compare TCP · UDP · TCP sequence number · TCP flow control
Current · 12 min
Compare TCP · UDP · TCP sequence number · TCP flow control
Concept notes
TCP
Provides connection-oriented reliable ordered delivery with acknowledgments.
UDP
Provides connectionless delivery without built-in retransmission or ordering.
TCP sequence number
Identifies byte positions so received data can be reordered.
TCP flow control
Uses a receive window to limit unacknowledged sender data.
Review the concept notes, then answer four related questions. That is enough for today; more practice is optional.
Practice the reasoning here
Write or inspect a small Cisco configuration, name the expected show-command evidence, and explain how a frame or packet crosses it.
- State the expected result before changing or testing anything.
- Name the observation, command, log, or report that would confirm it.
- Explain why the closest alternative does not fit the same requirement.
Check the whole objective
This unlocks objective 1.5 for recall. The latest checkpoint needs 70% or higher; a lower result puts the lesson back near the front of your timeline.