1.3 Introduction to IP Flashcards
What layer of the OSI model do TCP and UDP operate at?
OSI layer 4, the transport layer.
What does TCP stand for and what is its main characteristic?
Transmission Control Protocol; it is connection-oriented with reliable delivery and flow control.
How does UDP differ from TCP in terms of connection?
UDP is connectionless, with no formal open or close to the connection and no error recovery or flow control.
What is meant by “reliable delivery” in the context of TCP?
It means TCP can recover from errors, manage out-of-order messages, and retransmit data if needed.
What does flow control in TCP allow?
It allows the receiver to manage how much data is sent.
What is a key feature of UDP regarding data transmission?
UDP is “unreliable” as it doesn’t provide error recovery, reordering, or retransmission of data.
What is multiplexing in the context of TCP and UDP?
It is the use of multiple applications simultaneously.
What analogy is used to describe how IP addresses data delivery?
The IP is like a delivery truck that delivers data from one IP address to another.
What are non-ephemeral ports and their typical range?
Non-ephemeral ports are permanent port numbers ranging from 0 to 1023.
What range do ephemeral ports cover?
Ephemeral ports range from 1024 to 65,535.
Why is it said that port numbers are used for communication and not security?
Because port numbers facilitate data transmission but do not inherently provide security.
How are TCP and UDP port numbers different?
TCP port numbers and UDP port numbers are not the same and can be different for services.
