Recognizing TCP characteristics | LinuC Level 1 102 Exam original practice question

1.07.1Basic

Review the basic properties of TCP as a transport protocol over IP.

Which description is correct?

Hint 1: Focus on protocol roles

Separate reliable transport, datagram transport, IP control messages, and name resolution before comparing the choices.

Hint 2: Key terms

Review the short definitions of transport protocols, control messages, and name resolution involved.

TCP: A connection-oriented transport that provides an ordered, reliable byte stream.
UDP: A connectionless transport that sends independent datagrams without built-in delivery or ordering guarantees.
ICMP: An IP control and error-reporting protocol that does not identify applications with TCP or UDP ports.
DNS: An application protocol that maps names to IP addresses and other resource records.

Detailed explanation

Correct接続を確立し、順序制御や再送によって信頼性のあるバイトストリームを提供する

Correct. TCP establishes a connection and provides ordered, reliable byte-stream delivery.

Incorrect接続を確立せず、各データグラムの到着や順序を保証しない

Incorrect. This describes UDP.

IncorrectIPパケットのエラー通知と診断だけを担当し、ポート番号を持たない

Incorrect. This describes ICMP diagnostics and error reporting.

Incorrectホスト名をIPアドレスへ変換するアプリケーションプロトコルである

Incorrect. Hostname resolution is DNS's role.

An example you can run in a temporary verification environment.

python3 -c "import socket; print(socket.getprotobyname('tcp'), socket.SOCK_STREAM)"

6 1（TCPのプロトコル番号とストリームソケット種別）

Foundation review

The part of an IP address that identifies the network rather than a host.

TCP and UDP provide different delivery, reliability, and connection semantics.

A numbered endpoint used to deliver traffic to a network service.

Question IDKL-102-953

EnvironmentPython 3 socket / 外部通信なし

Last technical review2026-08-13

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