Tag: tcpip

IP network

Posted on by lechuck park

From DALL-E with some prompting
The image presents an overview of IP network operation, emphasizing that there are two main methods by which data moves across the network. The focus is on the second method, where:

  • IP Address: Acts as the unique identifier within the internet, similar to a physical address in the real world.
  • Transmission Devices: These are network devices like switches and routers that facilitate the movement of data packets through the network.
  • Packets and Physical Connections: Data packets are routed based on their IP addresses through physical connections established within the network infrastructure.

The core message is that in an IP network, data doesn’t move on its own; it is routed based on IP addresses through devices that make the transport decisions, highlighting the importance of network infrastructure in the efficient delivery of data packets to their intended destinations.


ARP/RARP

Posted on by lechuck park

From DALL-E with some prompting
The image focuses on the primary uses and applications of ARP and RARP protocols in a network. ARP (Address Resolution Protocol) is utilized to translate IP addresses into MAC addresses to ensure packets are delivered to the correct destination. This information is stored in the ARP table, facilitating packet forwarding across the Ethernet network. On the other hand, RARP (Reverse Address Resolution Protocol) has largely been superseded by DHCP (Dynamic Host Configuration Protocol). DHCP is commonly used to dynamically assign IP addresses to devices on a network and to automatically configure network setting information.

TCP vs UDP

Posted on by lechuck park

From DALL-E with some prompting
This image explains how TCP provides reliable data transmission compared to UDP and underscores the reasons for this reliability. While UDP has a simple header structure utilizing basic port numbers and checksums, TCP includes additional fields in its header to ensure reliability. These supplementary fields encompass sequence and acknowledgment numbers for confirming data transmission and ordering, flags for connection state management, window size for flow control, and mechanisms for congestion control. The reliability of TCP is enabled through this complex header structure, with each field playing an essential role in ensuring accurate and dependable data transfer. Therefore, the reliability of all TCP communications is established through these specific fields in the header, emphasizing that TCP not just ‘enables’ reliability but ‘implements’ it in practice.