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Packets of the same session may be routed through different paths in: A. TCP, but not UDP B. TCP and UDP C. UDP, but not TCP D. Neither TCP nor UDP

GATE 2005 · Computer Networks · UDP · easy

Answer: Both TCP and UDP can have their packets routed through different paths. Answer: B. TCP and UDP.

  1. Identify the layer responsible for routing: Routing is done by the Network layer (IP), not the transport layer (TCP/UDP). Both TCP and UDP pass their segments as payloads inside IP datagrams.
  2. Apply IP's best-effort, connectionless property: IP routes each datagram independently. Even consecutive packets sent by the same TCP connection or UDP socket can be forwarded via different routers if the routing tables change between packets. Therefore, both TCP sessions and UDP sessions can have their packets routed through different paths.