IB Computer Science Topic A2.1.4 Network Protocols Used for Transport and Application Revision Notes (SL/HL)

IB Computer Science Topic A2.1.4 Network Protocols Used for Transport and Application Revision Notes (SL/HL) | RevisionDojo

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Transmission Control Protocol (TCP)

Definition

Transmission Control Protocol (TCP)

Transmission Control Protocol (TCP) is a connection-oriented protocol that ensures reliable and ordered delivery of data between devices on a network.

Note

TCP operates at the transport layer of the TCP/IP model, providing end-to-end communication services for applications.

Key Features of TCP

Connection Establishment: TCP uses a three-way handshake to establish a connection between the sender and receiver.
1. SYN: The sender sends a synchronization request.
2. SYN-ACK: The receiver acknowledges the request and sends its own synchronization request.
3. ACK: The sender acknowledges the receiver's request, establishing the connection.
Reliable Data Transfer: TCP ensures that all data packets are delivered accurately and in the correct order.
1. Acknowledgments: The receiver sends an acknowledgment for each packet received.
2. Retransmission: If a packet is lost or corrupted, the sender retransmits it.
Flow Control: TCP uses a sliding window mechanism to prevent network congestion by controlling the rate of data transmission.
Connection Termination: TCP gracefully closes connections using a four-way handshake (FIN, ACK, FIN, ACK).

Tip

When implementing TCP in applications, consider its overhead.
While TCP ensures reliability, it may introduce latency due to its connection setup and error-checking mechanisms.

User Datagram Protocol (UDP)

Definition

User Datagram Protocol (UDP)

User Datagram Protocol (UDP) is a connectionless protocol that provides faster but less reliable data transmission compared to TCP.

Note

UDP operates at the transport layer and is ideal for applications where speed is prioritized over reliability.

Key Features of UDP

Connectionless Communication: UDP does not establish a connection before sending data, reducing overhead and latency.

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Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Note

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Tip

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Transmission Control Protocol (TCP)

Definition

Transmission Control Protocol (TCP)

Transmission Control Protocol (TCP) is a connection-oriented protocol that ensures reliable and ordered delivery of data between devices on a network.

Note

TCP operates at the transport layer of the TCP/IP model, providing end-to-end communication services for applications.

Key Features of TCP

Connection Establishment: TCP uses a three-way handshake to establish a connection between the sender and receiver.
1. SYN: The sender sends a synchronization request.
2. SYN-ACK: The receiver acknowledges the request and sends its own synchronization request.
3. ACK: The sender acknowledges the receiver's request, establishing the connection.
Reliable Data Transfer: TCP ensures that all data packets are delivered accurately and in the correct order.
1. Acknowledgments: The receiver sends an acknowledgment for each packet received.
2. Retransmission: If a packet is lost or corrupted, the sender retransmits it.
Flow Control: TCP uses a sliding window mechanism to prevent network congestion by controlling the rate of data transmission.
Connection Termination: TCP gracefully closes connections using a four-way handshake (FIN, ACK, FIN, ACK).

Tip

When implementing TCP in applications, consider its overhead.
While TCP ensures reliability, it may introduce latency due to its connection setup and error-checking mechanisms.

User Datagram Protocol (UDP)

Definition

User Datagram Protocol (UDP)

User Datagram Protocol (UDP) is a connectionless protocol that provides faster but less reliable data transmission compared to TCP.

Note

UDP operates at the transport layer and is ideal for applications where speed is prioritized over reliability.

Key Features of UDP

Connectionless Communication: UDP does not establish a connection before sending data, reducing overhead and latency.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A1 Computer fundamentals4 subtopics

A2 Networks4 subtopics

A3 Databases4 subtopics

A4 Machine learning4 subtopics

B1 Computational thinking1 subtopic

B2 Programming5 subtopics

B3 Object-oriented programming2 subtopics

B4 Abstract data types (HL only)1 subtopic

IB Computer Science Topic A2.1.4: Network Protocols Used for Transport and Application Notes

A1 Computer fundamentals4 subtopics

A2 Networks4 subtopics

A3 Databases4 subtopics

A4 Machine learning4 subtopics

B1 Computational thinking1 subtopic

B2 Programming5 subtopics

B3 Object-oriented programming2 subtopics

B4 Abstract data types (HL only)1 subtopic

Transmission Control Protocol (TCP)

Key Features of TCP

User Datagram Protocol (UDP)

Key Features of UDP

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Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Transmission Control Protocol (TCP)

Key Features of TCP

User Datagram Protocol (UDP)

Key Features of UDP

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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